diff --git a/README.md b/README.md index 8589a2b..b9a5f07 100644 --- a/README.md +++ b/README.md @@ -11,8 +11,11 @@ For a more technical breakdown and explanation, you can read more on the [overvi [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT) -The `thunderbird user.js` is a **template** which aims to provide as much privacy and enhanced security as possible. -It differs from the `arkenfox user.js` in that the focus is to keep Thunderbird as an **email client** and disable as many web browsing features as possible. We believe web browsing should be done in a web browser, and not an email client. +The `thunderbird user.js` is a **template** which aims to provide as much privacy and enhanced security as possible, and to reduce tracking and fingerprinting as much as possible - while minimizing any loss of functionality and breakage (but it will happen). + +Everyone, experts included, should at least read the [implementation](https://github.com/HorlogeSkynet/thunderbird-user.js/wiki/1.3-Implementation) wiki page. + +It differs from the `arkenfox user.js` in that the focus is to keep Thunderbird as an **e-mail client** and disable as many web browsing features as possible. We believe web browsing should be done in a web browser, and not an email client. - If you're using Thunderbird (< 68) with Tor we suggest that you install the [TorBirdy](https://addons.thunderbird.net/addon/torbirdy) add-on. If you are using Tor, you should also consider using [Tails](https://tails.boum.org/) or [Whonix](https://www.whonix.org/). - If you're using **Gmail**, please check [this article about OAuth2](https://github.com/HorlogeSkynet/thunderbird-user.js/wiki/3.1-OAuth2-Users). diff --git a/user.js b/user.js index 1ff6fba..657b00d 100644 --- a/user.js +++ b/user.js @@ -1,183 +1,174 @@ /****** * name: thunderbird user.js * date: 14 December 2021 -* version: v78.1 +* version: v91-beta * url: https://github.com/HorlogeSkynet/thunderbird-user.js * license: MIT (https://github.com/HorlogeSkynet/thunderbird-user.js/blob/master/LICENSE) * releases: https://github.com/HorlogeSkynet/thunderbird-user.js/releases * README: - 0. Consider using Tor - 1. READ the full README - * https://github.com/HorlogeSkynet/thunderbird-user.js/blob/master/README.md - 2. READ this - * https://github.com/HorlogeSkynet/thunderbird-user.js/wiki/1.3-Implementation - 3. If you skipped steps 1 and 2 above (shame on you), then here is the absolute minimum - * Auto-installing updates for Thunderbird and extensions are disabled (section 0302) - * Real time binary checks with Google services are disabled (section 0412) - * Browsing related technologies, and JavaScript disabled. Use your web browser for browsing. - * You will need to make changes, and to troubleshoot at times (choose wisely, there is always a trade-off). - While not 100% definitive, search for "[SETUP". If required, add each pref to your overrides section at - default values (or comment them out and reset them in about:config). Here are the main ones: + + 1. Consider using Tor if it meets your needs or fits your threat model + * https://www.torproject.org/about/torusers.html.en + 2. Required reading: Overview, Backing Up, and Implementation entries + * https://github.com/HorlogeSkynet/thunderbird-user.js/wiki + 3. If you skipped step 2, return to step 2 + 4. Make changes + * There are often trade-offs and conflicts between security vs privacy vs anti-fingerprinting + and these need to be balanced against functionality & convenience & breakage + * Some site breakage and unintended consequences will happen. Everyone's experience will differ + e.g. some user data is erased on close (section 2800), change this to suit your needs + * While not 100% definitive, search for "[SETUP" tags + e.g. wanna re-enable account auto configuration? check 9101 & 9102 + * Take the wiki link in step 2 and read the Troubleshooting entry + 5. Some tag info [SETUP-INSTALL] if you experience any issue during Thunderbird setting up, read it [SETUP-FEATURE] if you miss some (expected) Thunderbird features, read it [SETUP-SECURITY] it's one item, read it [SETUP-WEB] can cause some websites to break - [SETUP-CHROME] changes how Thunderbird itself behaves (i.e. NOT directly website related) - [SETUP-PERF] may impact performance - [SETUP-HARDEN] maybe you should consider using the Tor Browser - * [WARNING] tags are extra special and used sparingly, so heed them - 4. BACKUP your profile folder before implementing (and/or test in a new/cloned profile) - 5. KEEP UP TO DATE: https://github.com/arkenfox/user.js/wiki#small_orange_diamond-maintenance + [SETUP-CHROME] changes how Thunderbird itself behaves (i.e. not directly website related) * INDEX: + 0100: STARTUP 0200: GEOLOCATION / LANGUAGE / LOCALE - 0300: QUIET BIRD - 0400: BLOCKLISTS / SAFE BROWSING - 0500: SYSTEM ADD-ONS / EXPERIMENTS + 0300: QUIETER BIRD + 0400: SAFE BROWSING 0600: BLOCK IMPLICIT OUTBOUND - 0700: HTTP* / TCP/IP / DNS / PROXY / SOCKS etc - 0800: HISTORY / FORMS - 1000: CACHE / FAVICONS - 1200: HTTPS (SSL/TLS / OCSP / CERTS / HPKP / CIPHERS) + 0700: DNS / DoH / PROXY / SOCKS / IPv6 + 0800: LOCATION BAR / SEARCH BAR / SUGGESTIONS / HISTORY / FORMS + 0900: PASSWORDS + 1000: DISK AVOIDANCE + 1200: HTTPS (SSL/TLS / OCSP / CERTS / HPKP) 1400: FONTS 1600: HEADERS / REFERERS - 1800: PLUGINS - 2000: MEDIA / CAMERA / MIC - 2200: WINDOW MEDDLING & LEAKS / POPUPS + 1700: CONTAINERS + 2000: PLUGINS / MEDIA / WEBRTC 2300: WEB WORKERS - 2400: DOM (DOCUMENT OBJECT MODEL) & JAVASCRIPT + 2400: DOM (DOCUMENT OBJECT MODEL) 2600: MISCELLANEOUS 2700: PERSISTENT STORAGE 2800: SHUTDOWN 4000: FPI (FIRST PARTY ISOLATION) 4500: RFP (RESIST FINGERPRINTING) - 4600: RFP ALTERNATIVES - 4700: RFP ALTERNATIVES (NAVIGATOR / USER AGENT (UA) SPOOFING) - 5000: PERSONAL - 6000: THUNDERBIRD (AUTO CONFIG / UI / HEADERS / ADDRESS BOOK) - 6100: EMAIL COMPOSITION (ENCODING / FORMAT / VIEW) - 6200: OTHER THUNDERBIRD COMPONENTS (CHAT / CALENDAR / RSS) - 6300: THUNDERBIRD ENCRYPTION (ENIGMAIL / AUTOCRYPT / GNUPG) + 5000: OPTIONAL OPSEC + 5500: OPTIONAL HARDENING + 6000: DON'T TOUCH + 7000: DON'T BOTHER + 8000: DON'T BOTHER: NON-RFP + 9000: PERSONAL + 9100: THUNDERBIRD (AUTO CONFIG / UI / HEADERS / ADDRESS BOOK) + 9200: EMAIL COMPOSITION (ENCODING / FORMAT / VIEW) + 9300: OTHER THUNDERBIRD COMPONENTS (CHAT / CALENDAR / RSS) + 9400: THUNDERBIRD ENCRYPTION (OPENGPG / GNUPG) 9999: DEPRECATED / REMOVED / LEGACY / RENAMED ******/ /* START: internal custom pref to test for syntax errors - * [NOTE] In FF60+, not all syntax errors cause parsing to abort i.e. reaching the last debug - * pref no longer necessarily means that all prefs have been applied. Check the console right + * [NOTE] Not all syntax errors cause parsing to abort i.e. reaching the last debug pref + * no longer necessarily means that all prefs have been applied. Check the console right * after startup for any warnings/error messages related to non-applied prefs * [1] https://blog.mozilla.org/nnethercote/2018/03/09/a-new-preferences-parser-for-firefox/ ***/ user_pref("_user.js.parrot", "START: Oh yes, the Norwegian Blue... what's wrong with it?"); -/* 0000: disable about:config warning - * FF71-72: chrome://global/content/config.xul - * FF73+: chrome://global/content/config.xhtml ***/ -user_pref("general.warnOnAboutConfig", false); // XUL/XHTML version -user_pref("browser.aboutConfig.showWarning", false); // HTML version [FF71+] +/* 0000: disable about:config warning ***/ +user_pref("browser.aboutConfig.showWarning", false); /*** [SECTION 0100]: STARTUP ***/ user_pref("_user.js.parrot", "0100 syntax error: the parrot's dead!"); /* 0101: disable default browser check - * [SETTING] Edit>Preferences>Advanced>Always check to see if Thunderbird is the default mail client on startup ***/ + * [SETTING] General > System Integration > Always check to see if Thunderbird is the default... ***/ user_pref("mail.shell.checkDefaultClient", false); -/* 0102: set START page - * [SETTING] Edit>Preferences>General>Thunderbird Start Page ***/ +/* 0102: set START page [SETUP-CHROME] + * [SETTING] General > Thunderbird Start Page ***/ user_pref("mailnews.start_page.enabled", false); +/* 0104: set NEWTAB page + * true=Activity Stream (default), false=blank page ***/ +user_pref("browser.newtabpage.enabled", false); /*** [SECTION 0200]: GEOLOCATION / LANGUAGE / LOCALE ***/ user_pref("_user.js.parrot", "0200 syntax error: the parrot's definitely deceased!"); -/** GEOLOCATION ***/ -/* 0201: disable Location-Aware Browsing - * [NOTE] Best left at default "true", fingerprintable, is already behind a prompt (see 0202) - * [1] https://www.mozilla.org/firefox/geolocation/ ***/ -user_pref("geo.enabled", false); -/* 0202: set a default permission for Location (see 0201) [FF58+] - * 0=always ask (default), 1=allow, 2=block - * [NOTE] Best left at default "always ask", fingerprintable via Permissions API - * [SETTING] to add site exceptions: Page Info>Permissions>Access Your Location - * [SETTING] to manage site exceptions: Options>Privacy & Security>Permissions>Location>Settings ***/ - // user_pref("permissions.default.geo", 2); -/* 0203: use Mozilla geolocation service instead of Google when geolocation is enabled [FF74+] +/* 0201: use Mozilla geolocation service instead of Google if permission is granted [FF74+] * Optionally enable logging to the console (defaults to false) ***/ user_pref("geo.provider.network.url", "https://location.services.mozilla.com/v1/geolocate?key=%MOZILLA_API_KEY%"); // user_pref("geo.provider.network.logging.enabled", true); // [HIDDEN PREF] -/* 0204: disable using the OS's geolocation service ***/ +/* 0202: disable using the OS's geolocation service ***/ user_pref("geo.provider.ms-windows-location", false); // [WINDOWS] user_pref("geo.provider.use_corelocation", false); // [MAC] user_pref("geo.provider.use_gpsd", false); // [LINUX] -/* 0206: disable geographically specific results/search engines e.g. "browser.search.*.US" - * i.e. ignore all of Mozilla's various search engines in multiple locales ***/ -user_pref("browser.search.geoSpecificDefaults", false); -user_pref("browser.search.geoSpecificDefaults.url", ""); - -/** LANGUAGE / LOCALE ***/ -/* 0210: set preferred language for displaying web pages +/* 0203: disable region updates + * [1] https://firefox-source-docs.mozilla.org/toolkit/modules/toolkit_modules/Region.html ***/ +user_pref("browser.region.network.url", ""); // [FF78+] +user_pref("browser.region.update.enabled", false); // [FF79+] +/* 0204: set search region + * [NOTE] May not be hidden if Thunderbird has changed your settings due to your region (0203) ***/ + // user_pref("browser.search.region", "US"); // [HIDDEN PREF] +/* 0210: set preferred language for displaying pages + * [SETTING] General > Language & Appearance > Language > Choose the language used to display... * [TEST] https://addons.mozilla.org/about ***/ user_pref("intl.accept_languages", "en-US, en"); /* 0210b: Set dictionary to US ***/ user_pref("spellchecker.dictionary", "en-US"); -/* 0211: enforce US English locale regardless of the system locale - * [SETUP-WEB] May break some input methods e.g xim/ibus for CJK languages, see [2] - * [1] https://bugzilla.mozilla.org/867501 - * [2] https://bugzilla.mozilla.org/1629630 ***/ +/* 0211: use US English locale regardless of the system locale + * [SETUP-WEB] May break some input methods e.g xim/ibus for CJK languages [1] + * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=867501,1629630 ***/ user_pref("javascript.use_us_english_locale", true); // [HIDDEN PREF] -/* 0212: enforce fallback text encoding to match en-US - * When the content or server doesn't declare a charset the browser will - * fallback to the "Current locale" based on your application language - * [SETTING] General>Language and Appearance>Fonts and Colors>Advanced>Text Encoding for Legacy Content (FF72-) - * [TEST] https://hsivonen.com/test/moz/check-charset.htm - * [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/20025 ***/ -user_pref("intl.charset.fallback.override", "windows-1252"); /*** [SECTION 0300]: QUIET BIRD Starting in user.js v68, we only disable the auto-INSTALL of Thunderbird. You still get prompts to update, in one click. We have NEVER disabled auto-CHECKING, and highly discourage that. - Previously we also disabled auto-INSTALLING of extensions (0302b). There are many legitimate reasons to turn off auto-INSTALLS, including hijacked or monetized extensions, time constraints, legacy issues, dev/testing, and fear of breakage/bugs. It is still important to do updates for security reasons, please do so manually if you make changes. ***/ user_pref("_user.js.parrot", "0300 syntax error: the parrot's not pinin' for the fjords!"); -/* 0301b: disable auto-CHECKING for extension and theme updates ***/ - // user_pref("extensions.update.enabled", false); -/* 0302a: disable auto-INSTALLING Thunderbird updates [SETUP-INSTALL] [NON-WINDOWS FF65+] - * [NOTE] In FF65+ on Windows this SETTING (below) is now stored in a file and the pref was removed - * [SETTING] General>Thunderbird Updates>Check for updates but let you choose to install them... ***/ +/** UPDATES ***/ +/* 0301: disable auto-INSTALLING Thunderbird updates [NON-WINDOWS] + * [NOTE] You will still get prompts to update, and should do so in a timely manner ***/ user_pref("app.update.auto", false); -/* 0302b: disable auto-INSTALLING extension and theme updates (after the check in 0301b) - * [SETTING] about:addons>Extensions>[cog-wheel-icon]>Update Add-ons Automatically (toggle) ***/ +/* 0302: disable auto-INSTALLING Thunderbird updates via a background service [FF90+] [WINDOWS] + * [SETTING] General > Thunderbird Updates > Automatically install updates > Use a background service to install updates + * [1] https://support.mozilla.org/kb/enable-background-updates-firefox-windows ***/ +user_pref("app.update.background.scheduling.enabled", false); +/* 0303: disable auto-CHECKING for extension and theme updates ***/ + // user_pref("extensions.update.enabled", false); +/* 0304: disable auto-INSTALLING extension and theme updates (after the check in 0303) + * [SETTING] about:addons > Extensions > [cog-wheel-icon] > Update Add-ons Automatically (toggle) ***/ // user_pref("extensions.update.autoUpdateDefault", false); -/* 0306: disable extension metadata +/* 0305: disable extension metadata * used when installing/updating an extension, and in daily background update checks: * when false, extension detail tabs will have no description * [NOTE] Unlike arkenfox/user.js, we explicitly disable it ***/ user_pref("extensions.getAddons.cache.enabled", false); -/* 0308: disable search engine updates (e.g. OpenSearch) - * [NOTE] This does not affect Mozilla's built-in or Web Extension search engines - * [SETTING] General>Thunderbird Updates>Automatically update search engines (FF72-) ***/ +/* 0306: disable search engine updates (e.g. OpenSearch) + * [NOTE] This does not affect Mozilla's built-in or Web Extension search engines ***/ user_pref("browser.search.update", false); -/* 0310: disable sending the URL of the website where a plugin crashed ***/ -user_pref("dom.ipc.plugins.reportCrashURL", false); -/* 0320: disable about:addons' Recommendations pane (uses Google Analytics) ***/ + +/** RECOMMENDATIONS ***/ +/* 0320: disable recommendation pane in about:addons (uses Google Analytics) ***/ user_pref("extensions.getAddons.showPane", false); // [HIDDEN PREF] /* 0321: disable recommendations in about:addons' Extensions and Themes panes [FF68+] ***/ user_pref("extensions.htmlaboutaddons.recommendations.enabled", false); -/* 0330: disable telemetry - * the pref (.unified) affects the behavior of the pref (.enabled) - * IF unified=false then .enabled controls the telemetry module - * IF unified=true then .enabled ONLY controls whether to record extended data - * so make sure to have both set as false. - * Restoring prompted=0 would make TB ask you on fresh install. - * [NOTE] FF58+ 'toolkit.telemetry.enabled' is now LOCKED to reflect prerelease - * or release builds (true and false respectively), see [2]. + +/** TELEMETRY ***/ +/* 0330: disable new data submission [FF41+] + * If disabled, no policy is shown or upload takes place, ever + * [1] https://bugzilla.mozilla.org/1195552 ***/ +user_pref("datareporting.policy.dataSubmissionEnabled", false); +/* 0331: disable Health Reports + * [SETTING] Privacy & Security > Thunderbird Data Collection and Use > Allow Thunderbird to send technical... ***/ +user_pref("datareporting.healthreport.uploadEnabled", false); +/* 0332: disable telemetry + * The "unified" pref affects the behaviour of the "enabled" pref + * - If "unified" is false then "enabled" controls the telemetry module + * - If "unified" is true then "enabled" only controls whether to record extended data + * [NOTE] "toolkit.telemetry.enabled" is now LOCKED to reflect prerelease (true) or release builds (false) [2] * [1] https://firefox-source-docs.mozilla.org/toolkit/components/telemetry/telemetry/internals/preferences.html * [2] https://medium.com/georg-fritzsche/data-preference-changes-in-firefox-58-2d5df9c428b5 ***/ user_pref("toolkit.telemetry.unified", false); -user_pref("toolkit.telemetry.enabled", false); // see [NOTE] above FF58+ -user_pref("toolkit.telemetry.prompted", 2); +user_pref("toolkit.telemetry.enabled", false); // see [NOTE] user_pref("toolkit.telemetry.server", "data:,"); user_pref("toolkit.telemetry.archive.enabled", false); user_pref("toolkit.telemetry.newProfilePing.enabled", false); // [FF55+] @@ -185,23 +176,45 @@ user_pref("toolkit.telemetry.shutdownPingSender.enabled", false); // [FF55+] user_pref("toolkit.telemetry.updatePing.enabled", false); // [FF56+] user_pref("toolkit.telemetry.bhrPing.enabled", false); // [FF57+] Background Hang Reporter user_pref("toolkit.telemetry.firstShutdownPing.enabled", false); // [FF57+] -/* 0340: disable Health Reports - * [SETTING] Privacy & Security>Thunderbird Data Collection & Use>Allow Thunderbird to send technical... data ***/ -user_pref("datareporting.healthreport.uploadEnabled", false); -/* 0341: disable new data submission, master kill switch [FF41+] - * If disabled, no policy is shown or upload takes place, ever - * [1] https://bugzilla.mozilla.org/1195552 ***/ -user_pref("datareporting.policy.dataSubmissionEnabled", false); -/* 0342: disable Studies (see 0503) +/* 0333: disable Telemetry Coverage + * [1] https://blog.mozilla.org/data/2018/08/20/effectively-measuring-search-in-firefox/ ***/ +user_pref("toolkit.telemetry.coverage.opt-out", true); // [HIDDEN PREF] +user_pref("toolkit.coverage.opt-out", true); // [FF64+] [HIDDEN PREF] +user_pref("toolkit.coverage.endpoint.base", ""); +/* 0334: disable PingCentre telemetry (used in several System Add-ons) [FF57+] + * Defense-in-depth: currently covered by 0331 ***/ +user_pref("browser.ping-centre.telemetry", false); + +/** STUDIES ***/ +/* 0340: disable Studies * [NOTE] This option is missing from Thunderbird's preferences panel (hidden?) ***/ user_pref("app.shield.optoutstudies.enabled", false); +/* 0341: disable Normandy/Shield [FF60+] + * Shield is a telemetry system that can push and test "recipes" + * [1] https://mozilla.github.io/normandy/ ***/ +user_pref("app.normandy.enabled", false); +user_pref("app.normandy.api_url", ""); + +/** CRASH REPORTS ***/ /* 0350: disable Crash Reports ***/ user_pref("breakpad.reportURL", ""); user_pref("browser.tabs.crashReporting.sendReport", false); // [FF44+] -user_pref("browser.crashReports.unsubmittedCheck.enabled", false); // [FF51+] -/* 0351: disable backlogged Crash Reports - * [SETTING] Privacy & Security>Thunderbird Data Collection & Use>Allow Thunderbird to send backlogged crash reports ***/ -user_pref("browser.crashReports.unsubmittedCheck.autoSubmit2", false); // [FF58+] + // user_pref("browser.crashReports.unsubmittedCheck.enabled", false); // [FF51+] [DEFAULT: false] +/* 0351: enforce no submission of backlogged Crash Reports [FF58+] + * [SETTING] Privacy & Security > Thunderbird Data Collection and Use > Allow Thunderbird to send backlogged crash reports... ***/ +user_pref("browser.crashReports.unsubmittedCheck.autoSubmit2", false); // [DEFAULT: false] + +/** OTHER ***/ +/* 0360: disable Captive Portal detection + * [1] https://www.eff.org/deeplinks/2017/08/how-captive-portals-interfere-wireless-security-and-privacy ***/ +user_pref("captivedetect.canonicalURL", ""); +user_pref("network.captive-portal-service.enabled", false); // [FF52+] +/* 0361: disable Network Connectivity checks [FF65+] + * [1] https://bugzilla.mozilla.org/1460537 ***/ +user_pref("network.connectivity-service.enabled", false); +/* 0362: enforce disabling of Web Compatibility Reporter [FF56+] + * Web Compatibility Reporter adds a "Report Site Issue" button to send data to Mozilla ***/ +user_pref("extensions.webcompat-reporter.enabled", false); // [DEFAULT: false] /* 0370: disable UI instrumentation ***/ user_pref("mail.instrumentation.postUrl", ""); user_pref("mail.instrumentation.askUser", false); @@ -216,195 +229,118 @@ user_pref("mail.instrumentation.userOptedIn", false); * [1] https://searchfox.org/comm-esr78/rev/384830b0570096c48770398060f87fbe556f6f01/mail/base/content/specialTabs.js#1218 ***/ user_pref("mail.rights.override", true); // [DEFAULT: unset] // user_pref("mail.rights.version", 1) // [DEFAULT: unset] -/* 0390: disable Captive Portal detection - * [1] https://www.eff.org/deeplinks/2017/08/how-captive-portals-interfere-wireless-security-and-privacy - * [2] https://wiki.mozilla.org/Necko/CaptivePortal ***/ -user_pref("captivedetect.canonicalURL", ""); -user_pref("network.captive-portal-service.enabled", false); // [FF52+] -/* 0391: disable Network Connectivity checks [FF65+] - * [1] https://bugzilla.mozilla.org/1460537 ***/ -user_pref("network.connectivity-service.enabled", false); +/* 0380: disable the unread message count badge on taskbar icon + * [1] https://www.thunderbird.net/en-US/thunderbird/91.0.2/releasenotes/#whatsnew */ + // user_pref("mail.biff.show_badge", false); // [WINDOWS] -/*** [SECTION 0400]: BLOCKLISTS / SAFE BROWSING (SB) ***/ -user_pref("_user.js.parrot", "0400 syntax error: the parrot's passed on!"); -/** BLOCKLISTS ***/ -/* 0401: enforce Firefox blocklist - * [NOTE] It includes updates for "revoked certificates" - * [1] https://blog.mozilla.org/security/2015/03/03/revoking-intermediate-certificates-introducing-onecrl/ ***/ -user_pref("extensions.blocklist.enabled", true); // [DEFAULT: true] +/*** [SECTION 0400]: SAFE BROWSING (SB) + SB has taken many steps to preserve privacy. If required, a full url is never sent + to Google, only a part-hash of the prefix, hidden with noise of other real part-hashes. + Firefox takes measures such as stripping out identifying parameters and since SBv4 (FF57+) + doesn't even use cookies. (#Turn on browser.safebrowsing.debug to monitor this activity) + FWIW, Google also swear it is anonymized and only used to flag malicious sites. -/** SAFE BROWSING (SB) - Safe Browsing has taken many steps to preserve privacy. *IF* required, a full url is never - sent to Google, only a PART-hash of the prefix, and this is hidden with noise of other real - PART-hashes. Google also swear it is anonymized and only used to flag malicious sites. - Firefox also takes measures such as striping out identifying parameters and since SBv4 (FF57+) - doesn't even use cookies. (#Turn on browser.safebrowsing.debug to monitor this activity) - - #Required reading [#] https://feeding.cloud.geek.nz/posts/how-safe-browsing-works-in-firefox/ - [1] https://wiki.mozilla.org/Security/Safe_Browsing - [2] https://support.mozilla.org/en-US/kb/how-does-phishing-and-malware-protection-work + [1] https://feeding.cloud.geek.nz/posts/how-safe-browsing-works-in-firefox/ + [2] https://wiki.mozilla.org/Security/Safe_Browsing + [3] https://support.mozilla.org/kb/how-does-phishing-and-malware-protection-work ***/ -/* 0410: disable SB (Safe Browsing) - * [WARNING] Do this at your own risk! These are the master switches. - * [SETTING] Privacy & Security>Security>... "Block dangerous and deceptive content" ***/ +user_pref("_user.js.parrot", "0400 syntax error: the parrot's passed on!"); +/* 0401: disable SB (Safe Browsing) + * [WARNING] Do this at your own risk! These are the master switches ***/ // user_pref("browser.safebrowsing.malware.enabled", false); // user_pref("browser.safebrowsing.phishing.enabled", false); -/* 0411: disable SB checks for downloads (both local lookups + remote) - * This is the master switch for the safebrowsing.downloads* prefs (0412, 0413) - * [SETTING] Privacy & Security>Security>... "Block dangerous downloads" ***/ +/* 0402: disable SB checks for downloads (both local lookups + remote) + * This is the master switch for the safebrowsing.downloads* prefs (0403, 0404) ***/ // user_pref("browser.safebrowsing.downloads.enabled", false); -/* 0412: disable SB checks for downloads (remote) - * To verify the safety of certain executable files, Firefox may submit some information about the +/* 0403: disable SB checks for downloads (remote) + * To verify the safety of certain executable files, Thunderbird may submit some information about the * file, including the name, origin, size and a cryptographic hash of the contents, to the Google - * Safe Browsing service which helps Firefox determine whether or not the file should be blocked + * Safe Browsing service which helps Thunderbird determine whether or not the file should be blocked * [SETUP-SECURITY] If you do not understand this, or you want this protection, then override it ***/ user_pref("browser.safebrowsing.downloads.remote.enabled", false); user_pref("browser.safebrowsing.downloads.remote.url", ""); -/* 0413: disable SB checks for unwanted software - * [SETTING] Privacy & Security>Security>... "Warn you about unwanted and uncommon software" ***/ +/* 0404: disable SB checks for unwanted software ***/ // user_pref("browser.safebrowsing.downloads.remote.block_potentially_unwanted", false); // user_pref("browser.safebrowsing.downloads.remote.block_uncommon", false); -/* 0419: disable 'ignore this warning' on SB warnings +/* 0405: disable "ignore this warning" on SB warnings [FF45+] * If clicked, it bypasses the block for that session. This is a means for admins to enforce SB * [TEST] see github wiki APPENDIX A: Test Sites: Section 5 * [1] https://bugzilla.mozilla.org/1226490 ***/ // user_pref("browser.safebrowsing.allowOverride", false); -/*** [SECTION 0500]: SYSTEM ADD-ONS / EXPERIMENTS - System Add-ons are a method for shipping extensions, considered to be - built-in features to Firefox, that are hidden from the about:addons UI. - To view your System Add-ons go to about:support, they are listed under "Firefox Features" - - Some System Add-ons have no on-off prefs. Instead you can manually remove them. Note that app - updates will restore them. They may also be updated and possibly restored automatically (see 0505) - * Portable: "...\App\Firefox64\browser\features\" (or "App\Firefox\etc" for 32bit) - * Windows: "...\Program Files\Mozilla\browser\features" (or "Program Files (X86)\etc" for 32bit) - * Mac: "...\Applications\Firefox\Contents\Resources\browser\features\" - [NOTE] On Mac you can right-click on the application and select "Show Package Contents" - * Linux: "/usr/lib/firefox/browser/features" (or similar) - - [1] https://firefox-source-docs.mozilla.org/toolkit/mozapps/extensions/addon-manager/SystemAddons.html - [2] https://searchfox.org/mozilla-central/source/browser/extensions -***/ -user_pref("_user.js.parrot", "0500 syntax error: the parrot's cashed in 'is chips!"); -/* 0503: disable Normandy/Shield [FF60+] - * Shield is an telemetry system (including Heartbeat) that can also push and test "recipes" - * [1] https://wiki.mozilla.org/Firefox/Shield - * [2] https://github.com/mozilla/normandy ***/ -user_pref("app.normandy.enabled", false); -user_pref("app.normandy.api_url", ""); -/* 0505: disable System Add-on updates ***/ -user_pref("extensions.systemAddon.update.enabled", false); // [FF62+] -user_pref("extensions.systemAddon.update.url", ""); // [FF44+] -/* 0506: disable PingCentre telemetry (used in several System Add-ons) [FF57+] - * Currently blocked by 'datareporting.healthreport.uploadEnabled' (see 0340) ***/ -user_pref("browser.ping-centre.telemetry", false); -/* 0517: disable Form Autofill - * [NOTE] Stored data is NOT secure (uses a JSON file) - * [NOTE] Heuristics controls Form Autofill on forms without @autocomplete attributes - * [SETTING] Privacy & Security>Forms and Autofill>Autofill addresses (FF74+) - * [1] https://wiki.mozilla.org/Firefox/Features/Form_Autofill - * [2] https://www.ghacks.net/2017/05/24/firefoxs-new-form-autofill-is-awesome/ ***/ -user_pref("extensions.formautofill.addresses.enabled", false); // [FF55+] -user_pref("extensions.formautofill.available", "off"); // [FF56+] -user_pref("extensions.formautofill.creditCards.enabled", false); // [FF56+] -user_pref("extensions.formautofill.heuristics.enabled", false); // [FF55+] -/* 0518: disable Web Compatibility Reporter [FF56+] - * Web Compatibility Reporter adds a "Report Site Issue" button to send data to Mozilla ***/ -user_pref("extensions.webcompat-reporter.enabled", false); - /*** [SECTION 0600]: BLOCK IMPLICIT OUTBOUND [not explicitly asked for - e.g. clicked on] ***/ user_pref("_user.js.parrot", "0600 syntax error: the parrot's no more!"); /* 0601: disable link prefetching * [1] https://developer.mozilla.org/docs/Web/HTTP/Link_prefetching_FAQ ***/ user_pref("network.prefetch-next", false); /* 0602: disable DNS prefetching - * [1] https://www.ghacks.net/2013/04/27/firefox-prefetching-what-you-need-to-know/ - * [2] https://developer.mozilla.org/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control ***/ + * [1] https://developer.mozilla.org/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control ***/ user_pref("network.dns.disablePrefetch", true); -user_pref("network.dns.disablePrefetchFromHTTPS", true); // [HIDDEN PREF ESR] [DEFAULT: true FF70+] + // user_pref("network.dns.disablePrefetchFromHTTPS", true); // [DEFAULT: true] /* 0603: disable predictor / prefetching ***/ user_pref("network.predictor.enabled", false); -user_pref("network.predictor.enable-prefetch", false); // [FF48+] -/* 0605: disable link-mouseover opening connection to linked server - * [1] https://news.slashdot.org/story/15/08/14/2321202/how-to-quash-firefoxs-silent-requests - * [2] https://www.ghacks.net/2015/08/16/block-firefox-from-connecting-to-sites-when-you-hover-over-links/ ***/ + // user_pref("network.predictor.enable-prefetch", false); // [FF48+] [DEFAULT: false] +/* 0604: disable link-mouseover opening connection to linked server + * [1] https://news.slashdot.org/story/15/08/14/2321202/how-to-quash-firefoxs-silent-requests ***/ user_pref("network.http.speculative-parallel-limit", 0); -/* 0606: disable "Hyperlink Auditing" (click tracking) and enforce same host in case +/* 0605: enforce no "Hyperlink Auditing" (click tracking) * [1] https://www.bleepingcomputer.com/news/software/major-browsers-to-prevent-disabling-of-click-tracking-privacy-risk/ ***/ -user_pref("browser.send_pings", false); // [DEFAULT: false] -user_pref("browser.send_pings.require_same_host", true); + // user_pref("browser.send_pings", false); // [DEFAULT: false] /* 0610: don't refresh nor reload pages when tab/window is not active or in idle state * [1] https://bugzilla.mozilla.org/show_bug.cgi?id=518805 ***/ user_pref("browser.meta_refresh_when_inactive.disabled", true); -/*** [SECTION 0700]: HTTP* / TCP/IP / DNS / PROXY / SOCKS etc ***/ +/*** [SECTION 0700]: DNS / DoH / PROXY / SOCKS / IPv6 ***/ user_pref("_user.js.parrot", "0700 syntax error: the parrot's given up the ghost!"); /* 0701: disable IPv6 - * IPv6 can be abused, especially regarding MAC addresses. They also do not play nice - * with VPNs. That's even assuming your ISP and/or router and/or website can handle it. - * [STATS] Firefox telemetry (June 2020) shows only 5% of all connections are IPv6. - * [NOTE] This is just an application level fallback. Disabling IPv6 is best done at an + * IPv6 can be abused, especially with MAC addresses, and can leak with VPNs: assuming + * your ISP and/or router and/or website is IPv6 capable. Most sites will fall back to IPv4 + * [STATS] Firefox telemetry (July 2021) shows ~10% of all connections are IPv6 + * [NOTE] This is an application level fallback. Disabling IPv6 is best done at an * OS/network level, and/or configured properly in VPN setups. If you are not masking your IP, * then this won't make much difference. If you are masking your IP, then it can only help. + * [NOTE] PHP defaults to IPv6 with "localhost". Use "php -S 127.0.0.1:PORT" * [TEST] https://ipleak.org/ - * [1] https://github.com/arkenfox/user.js/issues/437#issuecomment-403740626 - * [2] https://www.internetsociety.org/tag/ipv6-security/ (see Myths 2,4,5,6) ***/ + * [1] https://www.internetsociety.org/tag/ipv6-security/ (Myths 2,4,5,6) ***/ user_pref("network.dns.disableIPv6", true); user_pref("network.notify.IPv6", false); -/* 0702: disable HTTP2 - * HTTP2 raises concerns with "multiplexing" and "server push", does nothing to - * enhance privacy, and opens up a number of server-side fingerprinting opportunities. - * [WARNING] Disabling this made sense in the past, and doesn't break anything, but HTTP2 is - * at 40% (December 2019) and growing [5]. Don't be that one person using HTTP1.1 on HTTP2 sites - * [1] https://http2.github.io/faq/ - * [2] https://blog.scottlogic.com/2014/11/07/http-2-a-quick-look.html - * [3] https://http2.github.io/http2-spec/#rfc.section.10.8 - * [4] https://queue.acm.org/detail.cfm?id=2716278 - * [5] https://w3techs.com/technologies/details/ce-http2/all/all ***/ - // user_pref("network.http.spdy.enabled", false); - // user_pref("network.http.spdy.enabled.deps", false); - // user_pref("network.http.spdy.enabled.http2", false); - // user_pref("network.http.spdy.websockets", false); // [FF65+] -/* 0703: disable HTTP Alternative Services [FF37+] - * [SETUP-PERF] Relax this if you have FPI enabled (see 4000) *AND* you understand the - * consequences. FPI isolates these, but it was designed with the Tor protocol in mind, - * and the Tor Browser has extra protection, including enhanced sanitizing per Identity. - * [1] https://tools.ietf.org/html/rfc7838#section-9 - * [2] https://www.mnot.net/blog/2016/03/09/alt-svc ***/ -user_pref("network.http.altsvc.enabled", false); -user_pref("network.http.altsvc.oe", false); -/* 0704: enforce the proxy server to do any DNS lookups when using SOCKS +/* 0702: set the proxy server to do any DNS lookups when using SOCKS * e.g. in Tor, this stops your local DNS server from knowing your Tor destination * as a remote Tor node will handle the DNS request * [1] https://trac.torproject.org/projects/tor/wiki/doc/TorifyHOWTO/WebBrowsers ***/ user_pref("network.proxy.socks_remote_dns", true); -/* 0708: disable FTP [FF60+] - * [1] https://www.ghacks.net/2018/02/20/firefox-60-with-new-preference-to-disable-ftp/ ***/ -user_pref("network.ftp.enabled", false); -/* 0709: disable using UNC (Uniform Naming Convention) paths [FF61+] +/* 0703: disable using UNC (Uniform Naming Convention) paths [FF61+] * [SETUP-CHROME] Can break extensions for profiles on network shares * [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/26424 ***/ user_pref("network.file.disable_unc_paths", true); // [HIDDEN PREF] -/* 0710: disable GIO as a potential proxy bypass vector +/* 0704: disable GIO as a potential proxy bypass vector [FF60+] * Gvfs/GIO has a set of supported protocols like obex, network, archive, computer, dav, cdda, * gphoto2, trash, etc. By default only smb and sftp protocols are accepted so far (as of FF64) * [1] https://bugzilla.mozilla.org/1433507 - * [2] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/23044 - * [3] https://en.wikipedia.org/wiki/GVfs - * [4] https://en.wikipedia.org/wiki/GIO_(software) ***/ + * [2] https://en.wikipedia.org/wiki/GVfs + * [3] https://en.wikipedia.org/wiki/GIO_(software) ***/ user_pref("network.gio.supported-protocols", ""); // [HIDDEN PREF] +/* 0705: disable DNS-over-HTTPS (DoH) rollout [FF60+] + * 0=off by default, 2=TRR (Trusted Recursive Resolver) first, 3=TRR only, 5=explicitly off + * see "doh-rollout.home-region": USA Feb 2020, Canada July 2021 [3] + * [1] https://hacks.mozilla.org/2018/05/a-cartoon-intro-to-dns-over-https/ + * [2] https://wiki.mozilla.org/Security/DOH-resolver-policy + * [3] https://blog.mozilla.org/mozilla/news/firefox-by-default-dns-over-https-rollout-in-canada/ + * [4] https://www.eff.org/deeplinks/2020/12/dns-doh-and-odoh-oh-my-year-review-2020 ***/ + // user_pref("network.trr.mode", 5); +/* 0706: disable proxy direct failover for system requests [FF91+] + * [WARNING] Default true is a security feature against malicious extensions [1] + * [SETUP-CHROME] If you use a proxy and you trust your extensions + * [1] https://blog.mozilla.org/security/2021/10/25/securing-the-proxy-api-for-firefox-add-ons/ ***/ + // user_pref("network.proxy.failover_direct", false); -/*** [SECTION 0800]: HISTORY / FORMS - Consider your environment (no unwanted eyeballs), your device (restricted access), - your device's unattended state (locked, encrypted, forensic hardened). -***/ +/*** [SECTION 0800]: LOCATION BAR / SEARCH BAR / SUGGESTIONS / HISTORY / FORMS ***/ user_pref("_user.js.parrot", "0800 syntax error: the parrot's ceased to be!"); /* 0801: disable location bar using search - * Don't leak URL typos to a search engine, give an error message instead. + * Don't leak URL typos to a search engine, give an error message instead * Examples: "secretplace,com", "secretplace/com", "secretplace com", "secret place.com" - * [NOTE] This does **not** affect explicit user action such as using search buttons in the - * dropdown, or using keyword search shortcuts you configure in options (e.g. 'd' for DuckDuckGo) + * [NOTE] This does not affect explicit user action such as using search buttons in the + * dropdown, or using keyword search shortcuts you configure in options (e.g. "d" for DuckDuckGo) * [SETUP-CHROME] If you don't, or rarely, type URLs, or you use a default search * engine that respects privacy, then you probably don't need this ***/ user_pref("keyword.enabled", false); // [DEFAULT: false] @@ -416,80 +352,98 @@ user_pref("keyword.enabled", false); // [DEFAULT: false] * intend to), can leak sensitive data (e.g. query strings: e.g. Princeton attack), * and is a security risk (e.g. common typos & malicious sites set up to exploit this) ***/ user_pref("browser.fixup.alternate.enabled", false); -/* 0805: disable coloring of visited links - CSS history leak - * [NOTE] This has NEVER been fully "resolved": in Mozilla/docs it is stated it's - * only in 'certain circumstances', also see latest comments in [2] - * [TEST] https://earthlng.github.io/testpages/visited_links.html (see github wiki APPENDIX A on how to use) - * [1] https://dbaron.org/mozilla/visited-privacy - * [2] https://bugzilla.mozilla.org/147777 - * [3] https://developer.mozilla.org/docs/Web/CSS/Privacy_and_the_:visited_selector ***/ -user_pref("layout.css.visited_links_enabled", false); -/* 0807: disable live search suggestions -/* [NOTE] Both must be true for the location bar to work - * [SETUP-CHROME] Change these if you trust and use a privacy respecting search engine - * [SETTING] Search>Provide search suggestions | Show search suggestions in address bar results ***/ +/* 0804: disable live search suggestions + * [NOTE] Both must be true for the location bar to work + * [SETUP-CHROME] Change these if you trust and use a privacy respecting search engine ***/ user_pref("browser.search.suggest.enabled", false); -/* 0860: disable search and form history - * [SETUP-WEB] Be aware thet autocomplete form data can be read by third parties, see [1] [2] - * [NOTE] We also clear formdata on exit (see 2803) - * [SETTING] Privacy & Security>History>Custom Settings>Remember search and form history +/* 0810: disable search and form history + * [SETUP-WEB] Be aware that autocomplete form data can be read by third parties [1][2] + * [NOTE] We also clear formdata on exit (2803) * [1] https://blog.mindedsecurity.com/2011/10/autocompleteagain.html * [2] https://bugzilla.mozilla.org/381681 ***/ user_pref("browser.formfill.enable", false); -/* 0862: disable browsing and download history - * [NOTE] We also clear history and downloads on exiting Firefox (see 2803) - * [SETTING] Privacy & Security>History>Custom Settings>Remember browsing and download history ***/ -user_pref("places.history.enabled", false); +/* 0811: disable Form Autofill + * [NOTE] Stored data is NOT secure (uses a JSON file) + * [NOTE] Heuristics controls Form Autofill on forms without @autocomplete attributes + * [1] https://wiki.mozilla.org/Firefox/Features/Form_Autofill ***/ +user_pref("extensions.formautofill.addresses.enabled", false); // [FF55+] +user_pref("extensions.formautofill.available", "off"); // [FF56+] +user_pref("extensions.formautofill.creditCards.available", false); // [FF57+] +user_pref("extensions.formautofill.creditCards.enabled", false); // [FF56+] +user_pref("extensions.formautofill.heuristics.enabled", false); // [FF55+] +/* 0820: disable coloring of visited links + * Bulk rapid history sniffing was mitigated in 2010 [1][2]. Slower and more expensive + * redraw timing attacks were largely mitigated in FF77+ [3]. Using RFP (4501) further hampers timing + * attacks. Don't forget clearing history on close (2803). However, social engineering [2#limits][4][5] + * and advanced targeted timing attacks could still produce usable results + * [1] https://developer.mozilla.org/docs/Web/CSS/Privacy_and_the_:visited_selector + * [2] https://dbaron.org/mozilla/visited-privacy + * [3] https://bugzilla.mozilla.org/1632765 + * [4] https://earthlng.github.io/testpages/visited_links.html (see github wiki APPENDIX A on how to use) + * [5] https://lcamtuf.blogspot.com/2016/08/css-mix-blend-mode-is-bad-for-keeping.html ***/ +user_pref("layout.css.visited_links_enabled", false); -/*** [SECTION 1000]: CACHE / FAVICONS - Cache tracking/fingerprinting techniques [1][2][3] require a cache. Disabling disk (1001) - *and* memory (1003) caches is one solution; but that's extreme and fingerprintable. A hardened - Temporary Containers configuration can effectively do the same thing, by isolating every tab [4]. - - We consider avoiding disk cache (1001) so cache is session/memory only (like Private Browsing - mode), and isolating cache to first party (4001) is sufficient and a good balance between - risk and performance. ETAGs can also be neutralized by modifying response headers [5], and - you can clear the cache manually or on a regular basis with an extension. - - [1] https://en.wikipedia.org/wiki/HTTP_ETag#Tracking_using_ETags - [2] https://robertheaton.com/2014/01/20/cookieless-user-tracking-for-douchebags/ - [3] https://www.grepular.com/Preventing_Web_Tracking_via_the_Browser_Cache - [4] https://medium.com/@stoically/enhance-your-privacy-in-firefox-with-temporary-containers-33925cd6cd21 - [5] https://github.com/ghacksuserjs/ghacks-user.js/wiki/4.2.4-Header-Editor +/*** [SECTION 0900]: PASSWORDS + [1] https://support.mozilla.org/kb/use-primary-password-protect-stored-logins-and-pas ***/ -user_pref("_user.js.parrot", "1000 syntax error: the parrot's gone to meet 'is maker!"); -/** CACHE ***/ -/* 1001: disable disk cache - * [SETUP-PERF] If you think disk cache may help (heavy tab user, high-res video), - * or you use a hardened Temporary Containers, then feel free to override this - * [NOTE] We also clear cache on exiting Firefox (see 2803) ***/ -user_pref("browser.cache.disk.enable", false); -/* 1003: disable memory cache - * capacity: -1=determine dynamically (default), 0=none, n=memory capacity in kilobytes - * [NOTE] Unlike arkenfox/user.js, we explicitly disable it ***/ -user_pref("browser.cache.memory.enable", false); - // user_pref("browser.cache.memory.capacity", 0); // [HIDDEN PREF ESR] -/* 1006: disable permissions manager from writing to disk [RESTART] - * [NOTE] This means any permission changes are session only - * [1] https://bugzilla.mozilla.org/967812 ***/ - // user_pref("permissions.memory_only", true); // [HIDDEN PREF] +user_pref("_user.js.parrot", "0900 syntax error: the parrot's expired!"); +/* 0901: set when Thunderbird should prompt for the primary password + * 0=once per session (default), 1=every time it's needed, 2=after n minutes (0902) ***/ +user_pref("security.ask_for_password", 2); +/* 0902: set how long in minutes Thunderbird should remember the primary password (0901) ***/ + // user_pref("security.password_lifetime", 30); // [DEFAULT: 30] +/* 0903: disable auto-filling username & password form fields + * can leak in cross-site forms *and* be spoofed + * [NOTE] Username & password is still available when you enter the field + * [1] https://freedom-to-tinker.com/2017/12/27/no-boundaries-for-user-identities-web-trackers-exploit-browser-login-managers/ ***/ +user_pref("signon.autofillForms", false); +/* 0904: disable formless login capture for Password Manager [FF51+] ***/ +user_pref("signon.formlessCapture.enabled", false); +/* 0905: limit (or disable) HTTP authentication credentials dialogs triggered by sub-resources [FF41+] + * hardens against potential credentials phishing + * 0 = don't allow sub-resources to open HTTP authentication credentials dialogs + * 1 = don't allow cross-origin sub-resources to open HTTP authentication credentials dialogs + * 2 = allow sub-resources to open HTTP authentication credentials dialogs (default) ***/ +user_pref("network.auth.subresource-http-auth-allow", 1); +/* 0906: enforce no automatic authentication on Microsoft sites [FF91+] [WINDOWS 10+] + * [1] https://support.mozilla.org/kb/windows-sso ***/ +user_pref("network.http.windows-sso.enabled", false); // [DEFAULT: false] +/* 0910: prevent access to emails until the master password is entered + * If a master password has been set, Thunderbird will prevent access to locally available emails + * until the secret is provided. + * This preference MAY mitigate risk due to intimate relationship threat in some cases (see [2])... + * [WARNING] This DOES NOT encrypt locally cached emails anyhow (poor man's application security) + * [WARNING] This preference is very buggy, you might not manage to start Thunderbird when it's switched on + * [1] https://support.mozilla.org/en-US/kb/protect-your-thunderbird-passwords-master-password + * [2] https://www.schneier.com/wp-content/uploads/2020/06/Privacy_Threats_in_Intimate_Relationships-1.pdf ***/ + // user_pref("mail.password_protect_local_cache", true); // [HIDDEN PREF] -/** FAVICONS ***/ -/* 1030: disable favicons in shortcuts +/*** [SECTION 1000]: DISK AVOIDANCE ***/ +user_pref("_user.js.parrot", "1000 syntax error: the parrot's gone to meet 'is maker!"); +/* 1001: disable disk cache + * [SETUP-CHROME] If you think disk cache helps perf, then feel free to override this + * [NOTE] We also clear cache on exit (2803) ***/ +user_pref("browser.cache.disk.enable", false); +/* 1002: disable media cache from writing to disk in Private Browsing + * [NOTE] MSE (Media Source Extensions) are already stored in-memory in PB + * [SETUP-WEB] ESR78: playback might break on subsequent loading (1650281) ***/ +user_pref("browser.privatebrowsing.forceMediaMemoryCache", true); // [FF75+] +user_pref("media.memory_cache_max_size", 65536); +/* 1003: disable storing extra session data [SETUP-CHROME] + * define on which sites to save extra session data such as form content, cookies and POST data + * 0=everywhere, 1=unencrypted sites, 2=nowhere ***/ +user_pref("browser.sessionstore.privacy_level", 2); +/* 1004: set the minimum interval between session save operations + * Increasing this can help on older machines and some websites, as well as reducing writes [1] + * [1] https://bugzilla.mozilla.org/1304389 ***/ +user_pref("browser.sessionstore.interval", 30000); // [DEFAULT: 15000] +/* 1006: disable favicons in shortcuts * URL shortcuts use a cached randomly named .ico file which is stored in your - * profile/shortcutCache directory. The .ico remains after the shortcut is deleted. + * profile/shortcutCache directory. The .ico remains after the shortcut is deleted * If set to false then the shortcuts use a generic Firefox icon ***/ user_pref("browser.shell.shortcutFavicons", false); -/* 1031: disable favicons in history and bookmarks - * Stored as data blobs in favicons.sqlite, these don't reveal anything that your - * actual history (and bookmarks) already do. Your history is more detailed, so - * control that instead; e.g. disable history, clear history on close, use PB mode - * [NOTE] favicons.sqlite is sanitized on Firefox close, not in-session ***/ -user_pref("browser.chrome.site_icons", false); -/* 1032: disable favicons in web notifications ***/ - // user_pref("alerts.showFavicons", false); // [DEFAULT: false] -/*** [SECTION 1200]: HTTPS (SSL/TLS / OCSP / CERTS / HPKP / CIPHERS) +/*** [SECTION 1200]: HTTPS (SSL/TLS / OCSP / CERTS / HPKP) Your cipher and other settings can be used in server side fingerprinting [TEST] https://www.ssllabs.com/ssltest/viewMyClient.html [TEST] https://browserleaks.com/ssl @@ -499,53 +453,36 @@ user_pref("browser.chrome.site_icons", false); user_pref("_user.js.parrot", "1200 syntax error: the parrot's a stiff!"); /** SSL (Secure Sockets Layer) / TLS (Transport Layer Security) ***/ /* 1201: require safe negotiation - * Blocks connections to servers that don't support RFC 5746 [2] as they're potentially - * vulnerable to a MiTM attack [3]. A server *without* RFC 5746 can be safe from the attack - * if it disables renegotiations but the problem is that the browser can't know that. - * Setting this pref to true is the only way for the browser to ensure there will be + * Blocks connections (SSL_ERROR_UNSAFE_NEGOTIATION) to servers that don't support RFC 5746 [2] + * as they're potentially vulnerable to a MiTM attack [3]. A server without RFC 5746 can be + * safe from the attack if it disables renegotiations but the problem is that the browser can't + * know that. Setting this pref to true is the only way for the browser to ensure there will be * no unsafe renegotiations on the channel between the browser and the server. + * [STATS] SSL Labs (July 2021) reports over 99% of sites have secure renegotiation [4] * [1] https://wiki.mozilla.org/Security:Renegotiation * [2] https://tools.ietf.org/html/rfc5746 - * [3] https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3555 ***/ + * [3] https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3555 + * [4] https://www.ssllabs.com/ssl-pulse/ ***/ user_pref("security.ssl.require_safe_negotiation", true); -/* 1202: control TLS versions with min and max - * 1=TLS 1.0, 2=TLS 1.1, 3=TLS 1.2, 4=TLS 1.3 - * [STATS] Firefox telemetry (June 2020) shows only 0.16% of SSL handshakes use 1.0 or 1.1 - * [WARNING] Leave these at default, otherwise you alter your TLS fingerprint. - * [1] https://www.ssllabs.com/ssl-pulse/ ***/ - // user_pref("security.tls.version.min", 3); // [DEFAULT: 3 FF78+] - // user_pref("security.tls.version.max", 4); -/* 1204: disable SSL session tracking [FF36+] - * SSL Session IDs are unique, last up to 24hrs in Firefox, and can be used for tracking - * [SETUP-PERF] Relax this if you have FPI enabled (see 4000) *AND* you understand the - * consequences. FPI isolates these, but it was designed with the Tor protocol in mind, - * and the Tor Browser has extra protection, including enhanced sanitizing per Identity. - * [1] https://tools.ietf.org/html/rfc5077 - * [2] https://bugzilla.mozilla.org/967977 - * [3] https://arxiv.org/abs/1810.07304 ***/ -user_pref("security.ssl.disable_session_identifiers", true); // [HIDDEN PREF] +/* 1203: reset TLS 1.0 and 1.1 downgrades i.e. session only ***/ +user_pref("security.tls.version.enable-deprecated", false); // [DEFAULT: false] /* 1206: disable TLS1.3 0-RTT (round-trip time) [FF51+] - * [1] https://firefox-source-docs.mozilla.org/browser/base/sslerrorreport/preferences.html ***/ -user_pref("security.ssl.errorReporting.automatic", false); -user_pref("security.ssl.errorReporting.enabled", false); -user_pref("security.ssl.errorReporting.url", ""); -/* 1205: disable TLS1.3 0-RTT (round-trip time) [FF51+] * [1] https://github.com/tlswg/tls13-spec/issues/1001 * [2] https://blog.cloudflare.com/tls-1-3-overview-and-q-and-a/ ***/ user_pref("security.tls.enable_0rtt_data", false); /** OCSP (Online Certificate Status Protocol) - #Required reading [#] https://scotthelme.co.uk/revocation-is-broken/ ***/ -/* 1210: enable OCSP Stapling - * [1] https://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox/ ***/ -user_pref("security.ssl.enable_ocsp_stapling", true); -/* 1211: control when to use OCSP fetching (to confirm current validity of certificates) + [1] https://scotthelme.co.uk/revocation-is-broken/ + [2] https://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox/ +***/ +/* 1211: enforce OCSP fetching to confirm current validity of certificates * 0=disabled, 1=enabled (default), 2=enabled for EV certificates only * OCSP (non-stapled) leaks information about the sites you visit to the CA (cert authority) * It's a trade-off between security (checking) and privacy (leaking info to the CA) * [NOTE] This pref only controls OCSP fetching and does not affect OCSP stapling + * [SETTING] Privacy & Security > Security > Certificates > Query OCSP responder servers... * [1] https://en.wikipedia.org/wiki/Ocsp ***/ -user_pref("security.OCSP.enabled", 0); +user_pref("security.OCSP.enabled", 1); // [DEFAULT: 1] /* 1212: set OCSP fetch failures (non-stapled, see 1211) to hard-fail [SETUP-WEB] * When a CA cannot be reached to validate a cert, Firefox just continues the connection (=soft-fail) * Setting this pref to true tells Firefox to instead terminate the connection (=hard-fail) @@ -557,13 +494,11 @@ user_pref("security.OCSP.require", true); /** CERTS / HPKP (HTTP Public Key Pinning) ***/ /* 1220: disable or limit SHA-1 certificates - * 0=all SHA1 certs are allowed - * 1=all SHA1 certs are blocked - * 2=deprecated option that now maps to 1 - * 3=only allowed for locally-added roots (e.g. anti-virus) - * 4=only allowed for locally-added roots or for certs in 2015 and earlier - * [SETUP-CHROME] When disabled, some man-in-the-middle devices (e.g. security scanners and - * antivirus products, may fail to connect to HTTPS sites. SHA-1 is *almost* obsolete. + * 0 = allow all + * 1 = block all + * 3 = only allow locally-added roots (e.g. anti-virus) (default) + * 4 = only allow locally-added roots or for certs in 2015 and earlier + * [SETUP-CHROME] If you have problems, update your software: SHA-1 is obsolete * [1] https://blog.mozilla.org/security/2016/10/18/phasing-out-sha-1-on-the-public-web/ ***/ user_pref("security.pki.sha1_enforcement_level", 1); /* 1221: disable Windows 8.1's Microsoft Family Safety cert [FF50+] [WINDOWS] @@ -572,63 +507,49 @@ user_pref("security.pki.sha1_enforcement_level", 1); * 2=detect Family Safety mode and import the root * [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/21686 ***/ user_pref("security.family_safety.mode", 0); -/* 1222: disable intermediate certificate caching (fingerprinting attack vector) [FF41+] [RESTART] - * [NOTE] This affects login/cert/key dbs. The effect is all credentials are session-only. - * Saved logins and passwords are not available. Reset the pref and restart to return them. - * [1] https://shiftordie.de/blog/2017/02/21/fingerprinting-firefox-users-with-cached-intermediate-ca-certificates-fiprinca/ ***/ - // user_pref("security.nocertdb", true); // [HIDDEN PREF] -/* 1223: enforce strict pinning - * PKP (Public Key Pinning) 0=disabled 1=allow user MiTM (such as your antivirus), 2=strict - * [SETUP-INSTALL] If you rely on an AV (anti-virus) to protect your web browsing - * by inspecting ALL your web traffic, then leave at current 1 (default). - * [NOTE] It needs to be set to 1 when connecting to the ProtonMail's Bridge for the first time. +/* 1223: enable strict pinning + * PKP (Public Key Pinning) 0=disabled, 1=allow user MiTM (such as your antivirus), 2=strict + * [SETUP-WEB] If you rely on an AV (antivirus) to protect your web browsing + * by inspecting ALL your web traffic, then leave at current default=1 * [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/16206 ***/ user_pref("security.cert_pinning.enforcement_level", 2); +/* 1224: enable CRLite [FF73+] + * In FF84+ it covers valid certs and in mode 2 doesn't fall back to OCSP + * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1429800,1670985 + * [2] https://blog.mozilla.org/security/tag/crlite/ ***/ +user_pref("security.remote_settings.crlite_filters.enabled", true); +user_pref("security.pki.crlite_mode", 2); +/* 1225: enable loading of client certificates stored in OS certificate storage + * Bug: this does **NOT** work for S/MIME [1] + * [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1726442 ***/ + // user_pref("security.osclientcerts.autoload", true); /** MIXED CONTENT ***/ -/* 1240: disable insecure active content on https pages - * [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/21323 ***/ -user_pref("security.mixed_content.block_active_content", true); // [DEFAULT: true] /* 1241: disable insecure passive content (such as images) on https pages [SETUP-WEB] ***/ user_pref("security.mixed_content.block_display_content", true); -/* 1243: block unencrypted requests from Flash on encrypted pages to mitigate MitM attacks [FF59+] - * [1] https://bugzilla.mozilla.org/1190623 ***/ -user_pref("security.mixed_content.block_object_subrequest", true); - -/** CIPHERS [WARNING: do not meddle with your cipher suite: see the section 1200 intro] - * These are all the ciphers still using SHA-1 and CBC which are weaker than the available alternatives. (see "Cipher Suites" in [1]) - * Additionally some have other weaknesses like key sizes of 128 (or lower) [2] and/or no Perfect Forward Secrecy [3]. - * [1] https://browserleaks.com/ssl - * [2] https://en.wikipedia.org/wiki/Key_size - * [3] https://en.wikipedia.org/wiki/Forward_secrecy - ***/ -/* 1261: disable 3DES (effective key size < 128 and no PFS) - * [1] https://en.wikipedia.org/wiki/3des#Security - * [2] https://en.wikipedia.org/wiki/Meet-in-the-middle_attack - * [3] https://www-archive.mozilla.org/projects/security/pki/nss/ssl/fips-ssl-ciphersuites.html ***/ - // user_pref("security.ssl3.rsa_des_ede3_sha", false); -/* 1263: disable DHE (Diffie-Hellman Key Exchange) - * [1] https://www.eff.org/deeplinks/2015/10/how-to-protect-yourself-from-nsa-attacks-1024-bit-DH ***/ - // user_pref("security.ssl3.dhe_rsa_aes_128_sha", false); // [DEFAULT: false FF78+] - // user_pref("security.ssl3.dhe_rsa_aes_256_sha", false); // [DEFAULT: false FF78+] -/* 1264: disable the remaining non-modern cipher suites as of FF78 (in order of preferred by FF) ***/ - // user_pref("security.ssl3.ecdhe_ecdsa_aes_256_sha", false); - // user_pref("security.ssl3.ecdhe_ecdsa_aes_128_sha", false); - // user_pref("security.ssl3.ecdhe_rsa_aes_128_sha", false); - // user_pref("security.ssl3.ecdhe_rsa_aes_256_sha", false); - // user_pref("security.ssl3.rsa_aes_128_sha", false); // no PFS - // user_pref("security.ssl3.rsa_aes_256_sha", false); // no PFS +/* 1244: enable HTTPS-Only mode in all windows [FF76+] + * When the top-level is HTTPS, insecure subresources are also upgraded (silent fail) + * [TEST] http://example.com [upgrade] + * [TEST] http://neverssl.com/ [no upgrade] ***/ +user_pref("dom.security.https_only_mode", true); // [FF76+] +user_pref("dom.security.https_only_mode_pbm", true); // [FF80+] +/* 1245: enable HTTPS-Only mode for local resources [FF77+] ***/ +user_pref("dom.security.https_only_mode.upgrade_local", true); +/* 1246: disable HTTP background requests [FF82+] + * When attempting to upgrade, if the server doesn't respond within 3 seconds, + * Firefox sends HTTP requests in order to check if the server supports HTTPS or not + * This is done to avoid waiting for a timeout which takes 90 seconds + * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1642387,1660945 ***/ +user_pref("dom.security.https_only_mode_send_http_background_request", false); /** UI (User Interface) ***/ /* 1270: display warning on the padlock for "broken security" (if 1201 is false) * Bug: warning padlock not indicated for subresources on a secure page! [2] - * [STATS] SSL Labs (June 2020) reports 98.8% of sites have secure renegotiation [3] * [1] https://wiki.mozilla.org/Security:Renegotiation - * [2] https://bugzilla.mozilla.org/1353705 - * [3] https://www.ssllabs.com/ssl-pulse/ ***/ + * [2] https://bugzilla.mozilla.org/1353705 ***/ user_pref("security.ssl.treat_unsafe_negotiation_as_broken", true); /* 1271: control "Add Security Exception" dialog on SSL warnings - * 0=do neither 1=pre-populate url 2=pre-populate url + pre-fetch cert (default) + * 0=do neither, 1=pre-populate url, 2=pre-populate url + pre-fetch cert (default) * [1] https://github.com/pyllyukko/user.js/issues/210 ***/ user_pref("browser.ssl_override_behavior", 1); /* 1272: display advanced information on Insecure Connection warning pages @@ -636,8 +557,7 @@ user_pref("browser.ssl_override_behavior", 1); * i.e. it doesn't work for HSTS discrepancies (https://subdomain.preloaded-hsts.badssl.com/) * [TEST] https://expired.badssl.com/ ***/ user_pref("browser.xul.error_pages.expert_bad_cert", true); -/* 1273: display "insecure" icon and "Not Secure" text on HTTP sites ***/ -user_pref("security.insecure_connection_icon.enabled", true); // [FF59+] [DEFAULT: true FF70+] +/* 1273: display "Not Secure" text on HTTP sites ***/ user_pref("security.insecure_connection_text.enabled", true); // [FF60+] /* 1280: display warnings when insecure HTTP connections are made ***/ user_pref("security.warn_entering_weak", true); @@ -646,94 +566,51 @@ user_pref("security.warn_viewing_mixed", true); /*** [SECTION 1400]: FONTS ***/ user_pref("_user.js.parrot", "1400 syntax error: the parrot's bereft of life!"); -/* 1401: disable websites choosing fonts (0=block, 1=allow) - * This can limit most (but not all) JS font enumeration which is a high entropy fingerprinting vector - * [SETUP-WEB] Can break some PDFs (missing text). Limiting to default fonts can "uglify" the web - * [SETTING] General>Language and Appearance>Fonts & Colors>Advanced>Allow pages to choose... ***/ -user_pref("browser.display.use_document_fonts", 0); -/* 1403: disable icon fonts (glyphs) and local fallback rendering - * [1] https://bugzilla.mozilla.org/789788 - * [2] https://gitlab.torproject.org/legacy/trac/-/issues/8455 ***/ -user_pref("gfx.downloadable_fonts.enabled", false); // [FF41+] -user_pref("gfx.downloadable_fonts.fallback_delay", -1); -/* 1404: disable rendering of SVG OpenType fonts - * [1] https://wiki.mozilla.org/SVGOpenTypeFonts - iSECPartnersReport recommends to disable this ***/ +/* 1401: disable rendering of SVG OpenType fonts ***/ user_pref("gfx.font_rendering.opentype_svg.enabled", false); -/* 1408: disable graphite - * Graphite has had many critical security issues in the past, see [1] - * [1] https://www.mozilla.org/security/advisories/mfsa2017-15/#CVE-2017-7778 - * [2] https://en.wikipedia.org/wiki/Graphite_(SIL) ***/ -user_pref("gfx.font_rendering.graphite.enabled", false); +/* 1402: limit font visibility (Windows, Mac, some Linux) [FF79+] + * [NOTE] In FF80+ RFP ignores the pref and uses value 1 + * Uses hardcoded lists with two parts: kBaseFonts + kLangPackFonts [1], bundled fonts are auto-allowed + * 1=only base system fonts, 2=also fonts from optional language packs, 3=also user-installed fonts + * [1] https://searchfox.org/mozilla-central/search?path=StandardFonts*.inc ***/ +user_pref("layout.css.font-visibility.level", 1); /*** [SECTION 1600]: HEADERS / REFERERS - Only *cross domain* referers need controlling: leave 1601, 1602, 1605 and 1606 alone - --- - harden it a bit: set XOriginPolicy (1603) to 1 (as per the settings below) - harden it a bit more: set XOriginPolicy (1603) to 2 (and optionally 1604 to 1 or 2), expect breakage - --- - If you want any REAL control over referers and breakage, then use an extension. Either: - uMatrix: limited by scope, all requests are spoofed or not-spoofed - Smart Referrer: granular with source<->destination, whitelists - --- - - full URI: https://example.com:8888/foo/bar.html?id=1234 - scheme+host+port+path: https://example.com:8888/foo/bar.html - scheme+host+port: https://example.com:8888 - --- - #Required reading [#] https://feeding.cloud.geek.nz/posts/tweaking-referrer-for-privacy-in-firefox/ + Expect some breakage e.g. banks: use an extension if you need precise control + full URI: https://example.com:8888/foo/bar.html?id=1234 + scheme+host+port+path: https://example.com:8888/foo/bar.html + scheme+host+port: https://example.com:8888 + [1] https://feeding.cloud.geek.nz/posts/tweaking-referrer-for-privacy-in-firefox/ ***/ user_pref("_user.js.parrot", "1600 syntax error: the parrot rests in peace!"); -/* 1601: ALL: control when images/links send a referer - * 0=never, 1=send only when links are clicked, 2=for links and images (default) ***/ -user_pref("network.http.sendRefererHeader", 0); // [DEFAULT: 2] -/* 1602: ALL: control the amount of information to send - * 0=send full URI (default), 1=scheme+host+port+path, 2=scheme+host+port ***/ - // user_pref("network.http.referer.trimmingPolicy", 0); // [DEFAULT: 0] -/* 1603: CROSS ORIGIN: control when to send a referer +/* 1601: control when to send a cross-origin referer * 0=always (default), 1=only if base domains match, 2=only if hosts match - * [SETUP-WEB] Known to cause issues with older modems/routers and some sites e.g vimeo, icloud ***/ + * [SETUP-WEB] Known to cause issues with older modems/routers and some sites e.g vimeo, icloud, instagram ***/ user_pref("network.http.referer.XOriginPolicy", 2); -/* 1604: CROSS ORIGIN: control the amount of information to send [FF52+] +/* 1602: control the amount of cross-origin information to send [FF52+] * 0=send full URI (default), 1=scheme+host+port+path, 2=scheme+host+port ***/ -user_pref("network.http.referer.XOriginTrimmingPolicy", 0); // [DEFAULT: 0] -/* 1605: ALL: disable spoofing a referer - * [WARNING] Do not set this to true, as spoofing effectively disables the anti-CSRF - * (Cross-Site Request Forgery) protections that some sites may rely on ***/ - // user_pref("network.http.referer.spoofSource", false); // [DEFAULT: false] -/* 1606: ALL: set the default Referrer Policy [FF59+] - * 0=no-referer, 1=same-origin, 2=strict-origin-when-cross-origin, 3=no-referrer-when-downgrade - * [NOTE] This is only a default, it can be overridden by a site-controlled Referrer Policy - * [1] https://www.w3.org/TR/referrer-policy/ - * [2] https://developer.mozilla.org/docs/Web/HTTP/Headers/Referrer-Policy - * [3] https://blog.mozilla.org/security/2018/01/31/preventing-data-leaks-by-stripping-path-information-in-http-referrers/ ***/ -user_pref("network.http.referer.defaultPolicy", 0); // [DEFAULT: 3] -user_pref("network.http.referer.defaultPolicy.pbmode", 0); // [DEFAULT: 2] -/* 1610: ALL: enable the DNT (Do Not Track) HTTP header - * [NOTE] DNT is enforced with Enhanced Tracking Protection regardless of this pref - * [SETTING] Privacy & Security>Enhanced Tracking Protection>Send websites a "Do Not Track" signal... ***/ +user_pref("network.http.referer.XOriginTrimmingPolicy", 2); +/* 1603: enable the DNT (Do Not Track) HTTP header + * [NOTE] DNT is enforced with Enhanced Tracking Protection (2710) + * [SETTING] Privacy & Security > Privacy > Web Content > Send websites a "Do Not Track" signal... ***/ user_pref("privacy.donottrackheader.enabled", true); -/*** [SECTION 1800]: PLUGINS ***/ -user_pref("_user.js.parrot", "1800 syntax error: the parrot's pushing up daisies!"); -/* 1803: disable Flash plugin - * 0=deactivated, 1=ask, 2=enabled - * ESR52.x is the last branch to *fully* support NPAPI, FF52+ stable only supports Flash - * [NOTE] You can still override individual sites via site permissions ***/ -user_pref("plugin.state.flash", 0); -/* 1820: disable GMP (Gecko Media Plugins) - * [1] https://wiki.mozilla.org/GeckoMediaPlugins ***/ - // user_pref("media.gmp-provider.enabled", false); -/* 1825: disable widevine CDM (Content Decryption Module) - * [SETUP-WEB] if you *need* CDM, e.g. Netflix, Amazon Prime, Hulu, whatever ***/ -user_pref("media.gmp-widevinecdm.visible", false); -user_pref("media.gmp-widevinecdm.enabled", false); -/* 1830: disable all DRM content (EME: Encryption Media Extension) - * [SETUP-WEB] if you *need* EME, e.g. Netflix, Amazon Prime, Hulu, whatever - * [SETTING] General>DRM Content>Play DRM-controlled content - * [1] https://www.eff.org/deeplinks/2017/10/drms-dead-canary-how-we-just-lost-web-what-we-learned-it-and-what-we-need-do-next ***/ -user_pref("media.eme.enabled", false); +/*** [SECTION 1700]: CONTAINERS + Check out Temporary Containers [2], read the article [3], and visit the wiki/repo [4] + [1] https://wiki.mozilla.org/Security/Contextual_Identity_Project/Containers + [2] https://addons.mozilla.org/firefox/addon/temporary-containers/ + [3] https://medium.com/@stoically/enhance-your-privacy-in-firefox-with-temporary-containers-33925cd6cd21 + [4] https://github.com/stoically/temporary-containers/wiki +***/ +user_pref("_user.js.parrot", "1700 syntax error: the parrot's bit the dust!"); +/* 1701: enable Container Tabs and its UI setting [FF50+] ***/ +user_pref("privacy.userContext.enabled", true); +user_pref("privacy.userContext.ui.enabled", true); +/* 1702: set behaviour on "+ Tab" button to display container menu on left click [FF74+] + * [NOTE] The menu is always shown on long press and right click ***/ + // user_pref("privacy.userContext.newTabContainerOnLeftClick.enabled", true); -/*** [SECTION 2000]: MEDIA / CAMERA / MIC ***/ +/*** [SECTION 2000]: PLUGINS / MEDIA / WEBRTC ***/ user_pref("_user.js.parrot", "2000 syntax error: the parrot's snuffed it!"); /* 2001: disable WebRTC (Web Real-Time Communication) * [SETUP-WEB] WebRTC can leak your IP address from behind your VPN, but if this is not @@ -741,7 +618,7 @@ user_pref("_user.js.parrot", "2000 syntax error: the parrot's snuffed it!"); * [1] https://www.privacytools.io/#webrtc ***/ user_pref("media.peerconnection.enabled", false); /* 2002: limit WebRTC IP leaks if using WebRTC - * In FF70+ these settings match Mode 4 (Mode 3 in older versions) (see [3]) + * In FF70+ these settings match Mode 4 (Mode 3 in older versions) [3] * [TEST] https://browserleaks.com/webrtc * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1189041,1297416,1452713 * [2] https://wiki.mozilla.org/Media/WebRTC/Privacy @@ -749,347 +626,205 @@ user_pref("media.peerconnection.enabled", false); user_pref("media.peerconnection.ice.default_address_only", true); user_pref("media.peerconnection.ice.no_host", true); // [FF51+] user_pref("media.peerconnection.ice.proxy_only_if_behind_proxy", true); // [FF70+] -/* 2010: disable WebGL (Web Graphics Library) - * [SETUP-WEB] When disabled, may break some websites. When enabled, provides high entropy, - * especially with readPixels(). Some of the other entropy is lessened with RFP (see 4501) - * [1] https://www.contextis.com/resources/blog/webgl-new-dimension-browser-exploitation/ - * [2] https://security.stackexchange.com/questions/13799/is-webgl-a-security-concern ***/ -user_pref("webgl.disabled", true); -user_pref("webgl.enable-webgl2", false); -/* 2012: limit WebGL ***/ -user_pref("webgl.min_capability_mode", true); -user_pref("webgl.disable-fail-if-major-performance-caveat", true); -/* 2022: disable screensharing ***/ -user_pref("media.getusermedia.screensharing.enabled", false); -user_pref("media.getusermedia.browser.enabled", false); -user_pref("media.getusermedia.audiocapture.enabled", false); +/* 2020: disable GMP (Gecko Media Plugins) + * [1] https://wiki.mozilla.org/GeckoMediaPlugins ***/ +user_pref("media.gmp-provider.enabled", false); +/* 2021: disable widevine CDM (Content Decryption Module) + * [NOTE] This is covered by the EME master switch (2022) ***/ +user_pref("media.gmp-widevinecdm.enabled", false); +/* 2022: disable all DRM content (EME: Encryption Media Extension) + * [SETUP-WEB] e.g. Netflix, Amazon Prime, Hulu, HBO, Disney+, Showtime, Starz, DirectTV + * [TEST] https://bitmovin.com/demos/drm + * [1] https://www.eff.org/deeplinks/2017/10/drms-dead-canary-how-we-just-lost-web-what-we-learned-it-and-what-we-need-do-next ***/ +user_pref("media.eme.enabled", false); /* 2030: disable autoplay of HTML5 media [FF63+] - * 0=Allow all, 1=Block non-muted media (default in FF67+), 2=Prompt (removed in FF66), 5=Block all (FF69+) - * [NOTE] You can set exceptions under site permissions -* [SETTING] Privacy & Security>Permissions>Autoplay>Settings>Default for all websites ***/ - // user_pref("media.autoplay.default", 5); + * 0=Allow all, 1=Block non-muted media (default), 5=Block all + * [NOTE] You can set exceptions under site permissions ***/ +user_pref("media.autoplay.default", 5); /* 2031: disable autoplay of HTML5 media if you interacted with the site [FF78+] * 0=sticky (default), 1=transient, 2=user - * [NOTE] If you have trouble with some video sites, then add an exception (see 2030) - * [1] https://html.spec.whatwg.org/multipage/interaction.html#sticky-activation ***/ + * Firefox's Autoplay Policy Documentation [PDF] is linked below via SUMO + * [NOTE] If you have trouble with some video sites, then add an exception (2030) + * [1] https://support.mozilla.org/questions/1293231 ***/ user_pref("media.autoplay.blocking_policy", 2); -/*** [SECTION 2200]: WINDOW MEDDLING & LEAKS / POPUPS ***/ -user_pref("_user.js.parrot", "2200 syntax error: the parrot's 'istory!"); -/* 2201: prevent websites from disabling new window features ***/ -user_pref("dom.disable_window_open_feature.close", true); -user_pref("dom.disable_window_open_feature.location", true); // [DEFAULT: true] -user_pref("dom.disable_window_open_feature.menubar", true); -user_pref("dom.disable_window_open_feature.minimizable", true); -user_pref("dom.disable_window_open_feature.personalbar", true); // bookmarks toolbar -user_pref("dom.disable_window_open_feature.resizable", true); // [DEFAULT: true] -user_pref("dom.disable_window_open_feature.status", true); // [DEFAULT: true] -user_pref("dom.disable_window_open_feature.titlebar", true); -user_pref("dom.disable_window_open_feature.toolbar", true); -/* 2202: prevent scripts from moving and resizing open windows ***/ -user_pref("dom.disable_window_move_resize", true); -/* 2203: open links targeting new windows in a new tab instead - * This stops malicious window sizes and some screen resolution leaks. - * You can still right-click a link and open in a new window. - * [NOTE] Unlike arkenfox/user.js, we explicitly set them - * [TEST] https://arkenfox.github.io/TZP/tzp.html#screen - * [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/9881 ***/ -user_pref("browser.link.open_newwindow", 3); -user_pref("browser.link.open_newwindow.restriction", 0); -/* 2204: disable Fullscreen API (requires user interaction) to prevent screen-resolution leaks - * [NOTE] You can still manually toggle the browser's fullscreen state (F11), - * but this pref will disable embedded video/game fullscreen controls, e.g. youtube - * [TEST] https://arkenfox.github.io/TZP/tzp.html#screen ***/ - // user_pref("full-screen-api.enabled", false); // [DEFAULT: false] -/* 2210: block popup windows - * [SETTING] Privacy & Security>Permissions>Block pop-up windows ***/ -user_pref("dom.disable_open_during_load", true); -/* 2212: limit events that can cause a popup [SETUP-WEB] - * default is "change click dblclick auxclick mouseup pointerup notificationclick reset submit touchend contextmenu" ***/ -user_pref("dom.popup_allowed_events", "click dblclick"); - /*** [SECTION 2300]: WEB WORKERS - A worker is a JS "background task" running in a global context, i.e. it is different from - the current window. Workers can spawn new workers (must be the same origin & scheme), - including service and shared workers. Shared workers can be utilized by multiple scripts and - communicate between browsing contexts (windows/tabs/iframes) and can even control your cache. - [NOTE] uMatrix 1.2.0+ allows a per-scope control for workers (2301-deprecated) and service workers (2302) - #Required reading [#] https://github.com/gorhill/uMatrix/releases/tag/1.2.0 - [1] Web Workers: https://developer.mozilla.org/docs/Web/API/Web_Workers_API - [2] Worker: https://developer.mozilla.org/docs/Web/API/Worker - [3] Service Worker: https://developer.mozilla.org/docs/Web/API/Service_Worker_API - [4] SharedWorker: https://developer.mozilla.org/docs/Web/API/SharedWorker - [5] ChromeWorker: https://developer.mozilla.org/docs/Web/API/ChromeWorker - [6] Notifications: https://support.mozilla.org/questions/1165867#answer-981820 + A worker is a JS "background task" running in a global context, i.e. it is different from + the current window. Workers can spawn new workers (must be the same origin & scheme), + including service and shared workers. Shared workers can be utilized by multiple scripts and + communicate between browsing contexts (windows/tabs/iframes) and can even control your cache. + + [1] Web Workers: https://developer.mozilla.org/docs/Web/API/Web_Workers_API + [2] Worker: https://developer.mozilla.org/docs/Web/API/Worker + [3] Service Worker: https://developer.mozilla.org/docs/Web/API/Service_Worker_API + [4] SharedWorker: https://developer.mozilla.org/docs/Web/API/SharedWorker + [5] ChromeWorker: https://developer.mozilla.org/docs/Web/API/ChromeWorker + [6] Notifications: https://support.mozilla.org/questions/1165867#answer-981820 ***/ user_pref("_user.js.parrot", "2300 syntax error: the parrot's off the twig!"); /* 2302: disable service workers [FF32, FF44-compat] * Service workers essentially act as proxy servers that sit between web apps, and the - * browser and network, are event driven, and can control the web page/site it is associated + * browser and network, are event driven, and can control the web page/site they are associated * with, intercepting and modifying navigation and resource requests, and caching resources. - * [NOTE] Service worker APIs are hidden (in Firefox) and cannot be used when in PB mode. - * [NOTE] Service workers only run over HTTPS. Service workers have no DOM access. + * [NOTE] Service workers require HTTPS, have no DOM access, and are not supported in PB mode [1] * [SETUP-WEB] Disabling service workers will break some sites. This pref is required true for * service worker notifications (2304), push notifications (disabled, 2305) and service worker - * cache (2740). If you enable this pref, then check those settings as well ***/ + * cache (2740). If you enable this pref, then check those settings as well + * [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1320796#c7 ***/ user_pref("dom.serviceWorkers.enabled", false); /* 2304: disable Web Notifications - * [NOTE] Web Notifications can also use service workers (2302) and are behind a prompt (2306) - * [NOTE] Unlike arkenfox/user.js, we explicitly disable them as they are enabled by default + * [NOTE] Web Notifications can also use service workers (2302) and are behind a prompt (7002) * [1] https://developer.mozilla.org/docs/Web/API/Notifications_API ***/ user_pref("dom.webnotifications.enabled", false); // [FF22+] user_pref("dom.webnotifications.serviceworker.enabled", false); // [FF44+] /* 2305: disable Push Notifications [FF44+] * Push is an API that allows websites to send you (subscribed) messages even when the site - * isn't loaded, by pushing messages to your userAgentID through Mozilla's Push Server. + * isn't loaded, by pushing messages to your userAgentID through Mozilla's Push Server * [NOTE] Push requires service workers (2302) to subscribe to and display, and is behind - * a prompt (2306). Disabling service workers alone doesn't stop Firefox polling the - * Mozilla Push Server. To remove all subscriptions, reset your userAgentID (in about:config - * or on start), and you will get a new one within a few seconds. - * [1] https://support.mozilla.org/en-US/kb/push-notifications-firefox - * [2] https://developer.mozilla.org/en-US/docs/Web/API/Push_API ***/ + * a prompt (7002). Disabling service workers alone doesn't stop Thunderbird polling the + * Mozilla Push Server. To remove all subscriptions, reset your userAgentID. + * [1] https://support.mozilla.org/kb/push-notifications-firefox + * [2] https://developer.mozilla.org/docs/Web/API/Push_API ***/ user_pref("dom.push.enabled", false); // user_pref("dom.push.userAgentID", ""); -/* 2306: set a default permission for Notifications (both 2304 and 2305) [FF58+] - * 0=always ask (default), 1=allow, 2=block - * [NOTE] Best left at default "always ask", fingerprintable via Permissions API - * [SETTING] to add site exceptions: Page Info>Permissions>Receive Notifications - * [SETTING] to manage site exceptions: Options>Privacy & Security>Permissions>Notifications>Settings ***/ - // user_pref("permissions.default.desktop-notification", 2); -/*** [SECTION 2400]: DOM (DOCUMENT OBJECT MODEL) & JAVASCRIPT ***/ +/*** [SECTION 2400]: DOM (DOCUMENT OBJECT MODEL) ***/ user_pref("_user.js.parrot", "2400 syntax error: the parrot's kicked the bucket!"); -/* 2401: disable website control over browser right-click context menu - * [NOTE] Shift-Right-Click will always bring up the browser right-click context menu - * [NOTE] Unlike arkenfox/user.js, we explicitly disable it ***/ -user_pref("dom.event.contextmenu.enabled", false); -/* 2402: disable website access to clipboard events/content [SETUP-HARDEN] - * [NOTE] This will break some sites' functionality e.g. Outlook, Twitter, Facebook, Wordpress - * This applies to onCut/onCopy/onPaste events - i.e. it requires interaction with the website - * [WARNING] If both 'middlemouse.paste' and 'general.autoScroll' are true (at least one - * is default false) then enabling this pref can leak clipboard content, see [2] - * [NOTE] Unlike arkenfox/user.js, we explicitly disable it - * [1] https://www.ghacks.net/2014/01/08/block-websites-reading-modifying-clipboard-contents-firefox/ - * [2] https://bugzilla.mozilla.org/1528289 */ -user_pref("dom.event.clipboardevents.enabled", false); -/* 2404: disable clipboard commands (cut/copy) from "non-privileged" content [FF41+] - * this disables document.execCommand("cut"/"copy") to protect your clipboard - * [1] https://bugzilla.mozilla.org/1170911 ***/ -user_pref("dom.allow_cut_copy", false); -/* 2405: disable "Confirm you want to leave" dialog on page close - * Does not prevent JS leaks of the page close event. - * [1] https://developer.mozilla.org/docs/Web/Events/beforeunload - * [2] https://support.mozilla.org/questions/1043508 ***/ +/* 2401: disable "Confirm you want to leave" dialog on page close + * Does not prevent JS leaks of the page close event + * [1] https://developer.mozilla.org/docs/Web/Events/beforeunload ***/ user_pref("dom.disable_beforeunload", true); -/* 2414: disable shaking the screen ***/ -user_pref("dom.vibrator.enabled", false); -/* 2420: disable asm.js [FF22+] [SETUP-PERF] - * [1] http://asmjs.org/ - * [2] https://www.mozilla.org/security/advisories/mfsa2015-29/ - * [3] https://www.mozilla.org/security/advisories/mfsa2015-50/ - * [4] https://www.mozilla.org/security/advisories/mfsa2017-01/#CVE-2017-5375 - * [5] https://www.mozilla.org/security/advisories/mfsa2017-05/#CVE-2017-5400 - * [6] https://rh0dev.github.io/blog/2017/the-return-of-the-jit/ ***/ -user_pref("javascript.options.asmjs", false); -/* 2421: disable Ion and baseline JIT to harden against JS exploits [SETUP-HARDEN] - * [NOTE] In FF75+, when **both** Ion and JIT are disabled, **and** the new - * hidden pref is enabled, then Ion can still be used by extensions (1599226) - * [WARNING] Disabling Ion/JIT can cause some site issues and performance loss - * [NOTE] Unlike arkenfox/user.js, we explicitly disable them - * [1] https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0817 ***/ -user_pref("javascript.options.ion", false); -user_pref("javascript.options.baselinejit", false); -/* 2422: disable WebAssembly [FF52+] [SETUP-PERF] - * [NOTE] In FF71+ this no longer affects extensions (1576254) - * [1] https://developer.mozilla.org/docs/WebAssembly ***/ -user_pref("javascript.options.wasm", false); -/* 2426: disable Intersection Observer API [FF55+] [RESTART] - * [NOTE] Disabling it may break the error console (CTRL+SHIFT+J) - * [1] https://developer.mozilla.org/docs/Web/API/Intersection_Observer_API - * [2] https://w3c.github.io/IntersectionObserver/ - * [3] https://bugzilla.mozilla.org/1243846 ***/ - // user_pref("dom.IntersectionObserver.enabled", false); -/* 2429: enable (limited but sufficient) window.opener protection [FF65+] - * Makes rel=noopener implicit for target=_blank in anchor and area elements when no rel attribute is set ***/ -user_pref("dom.targetBlankNoOpener.enabled", true); // [DEFAULT: true FF78+] - -/*** [SECTION 2500]: HARDWARE FINGERPRINTING ***/ -user_pref("_user.js.parrot", "2500 syntax error: the parrot's shuffled off 'is mortal coil!"); -/* 2502: disable Battery Status API - * Initially a Linux issue (high precision readout) that was fixed. - * However, it is still another metric for fingerprinting, used to raise entropy. - * e.g. do you have a battery or not, current charging status, charge level, times remaining etc - * [NOTE] From FF52+ Battery Status API is only available in chrome/privileged code. see [1] - * [NOTE] Unlike arkenfox/user.js, we explicitly disable it - * [1] https://bugzilla.mozilla.org/1313580 ***/ -user_pref("dom.battery.enabled", false); -/* 2505: disable media device enumeration [FF29+] - * [NOTE] media.peerconnection.enabled should also be set to false (see 2001) - * [NOTE] Unlike arkenfox/user.js, we explicitly disable it - * [1] https://wiki.mozilla.org/Media/getUserMedia - * [2] https://developer.mozilla.org/docs/Web/API/MediaDevices/enumerateDevices ***/ -user_pref("media.navigator.enabled", false); -/* 2508: disable hardware acceleration to reduce graphics fingerprinting [SETUP-HARDEN] - * [WARNING] Affects text rendering (fonts will look different), impacts video performance, - * and parts of Quantum that utilize the GPU will also be affected as they are rolled out - * [SETTING] General>Performance>Custom>Use hardware acceleration when available - * [NOTE] Unlike arkenfox/user.js, we explicitly disable it - * [1] https://wiki.mozilla.org/Platform/GFX/HardwareAcceleration ***/ -user_pref("gfx.direct2d.disabled", true); // [WINDOWS] -user_pref("layers.acceleration.disabled", true); -/* 2510: disable Web Audio API [FF51+] - * [NOTE] Unlike arkenfox/user.js, we explicitly disable it - * [1] https://bugzilla.mozilla.org/1288359 ***/ -user_pref("dom.webaudio.enabled", false); -/* 2517: disable Media Capabilities API [FF63+] - * [WARNING] This *may* affect media performance if disabled, no one is sure - * [NOTE] Unlike arkenfox/user.js, we explicitly disable it - * [1] https://github.com/WICG/media-capabilities - * [2] https://wicg.github.io/media-capabilities/#security-privacy-considerations ***/ -user_pref("media.media-capabilities.enabled", false); -/* 2520: disable virtual reality devices - * Optional protection depending on your connected devices - * [NOTE] Unlike arkenfox/user.js, we explicitly disable them - * [1] https://developer.mozilla.org/docs/Web/API/WebVR_API ***/ -user_pref("dom.vr.enabled", false); -/* 2521: set a default permission for Virtual Reality (see 2520) [FF73+] - * 0=always ask (default), 1=allow, 2=block - * [SETTING] to add site exceptions: Page Info>Permissions>Access Virtual Reality Devices - * [SETTING] to manage site exceptions: Options>Privacy & Security>Permissions>Virtual Reality>Settings - * [NOTE] Unlike arkenfox/user.js, we explicitly disable it ***/ -user_pref("permissions.default.xr", 2); +/* 2402: prevent scripts from moving and resizing open windows ***/ +user_pref("dom.disable_window_move_resize", true); +/* 2403: block popup windows ***/ +user_pref("dom.disable_open_during_load", true); +/* 2404: limit events that can cause a popup [SETUP-WEB] ***/ +user_pref("dom.popup_allowed_events", "click dblclick mousedown pointerdown"); /*** [SECTION 2600]: MISCELLANEOUS ***/ user_pref("_user.js.parrot", "2600 syntax error: the parrot's run down the curtain!"); -/* 2601: prevent accessibility services from accessing your browser [RESTART] [SETUP-FEATURE] - * [SETTING] Privacy & Security>Permissions>Prevent accessibility services from accessing your browser (FF80 or lower) +/* 2601: prevent accessibility services from accessing your browser [RESTART] * [1] https://support.mozilla.org/kb/accessibility-services ***/ user_pref("accessibility.force_disabled", 1); /* 2602: disable sending additional analytics to web servers * [1] https://developer.mozilla.org/docs/Web/API/Navigator/sendBeacon ***/ user_pref("beacon.enabled", false); +/* 2603: remove temp files opened with an external application + * [1] https://bugzilla.mozilla.org/302433 ***/ +user_pref("browser.helperApps.deleteTempFileOnExit", true); +/* 2604: disable page thumbnail collection ***/ +user_pref("browser.pagethumbnails.capturing_disabled", true); // [HIDDEN PREF] +/* 2606: disable UITour backend so there is no chance that a remote page can use it ***/ +user_pref("browser.uitour.enabled", false); +user_pref("browser.uitour.url", ""); /* 2607: disable various developer tools in browser context - * [SETTING] Devtools>Advanced Settings>Enable browser chrome and add-on debugging toolboxes * [1] https://github.com/pyllyukko/user.js/issues/179#issuecomment-246468676 ***/ user_pref("devtools.chrome.enabled", false); -/* 2608: disable remote debugging +/* 2608: reset remote debugging to disabled * [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/16222 ***/ user_pref("devtools.debugger.remote-enabled", false); // [DEFAULT: false] -/* 2609: disable MathML (Mathematical Markup Language) [FF51+] [SETUP-HARDEN] - * [NOTE] Unlike arkenfox/user.js, we explicitly disable it - * [TEST] https://arkenfox.github.io/TZP/tzp.html#misc - * [1] https://bugzilla.mozilla.org/1173199 ***/ -user_pref("mathml.disabled", true); -/* 2610: disable in-content SVG (Scalable Vector Graphics) [FF53+] - * [NOTE] In FF70+ and ESR68.1.0+ this no longer affects extensions (1564208) - * [WARNING] Expect breakage incl. youtube player controls. Best left for a "hardened" profile. - * [1] https://bugzilla.mozilla.org/1216893 ***/ -user_pref("svg.disabled", true); /* 2611: disable middle mouse click opening links from clipboard * [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/10089 ***/ user_pref("middlemouse.contentLoadURL", false); -/* 2614: limit HTTP redirects (this does not control redirects with HTML meta tags or JS) - * [NOTE] A low setting of 5 or under will probably break some sites (e.g. gmail logins) - * To control HTML Meta tag and JS redirects, use an extension. Default is 20 ***/ -user_pref("network.http.redirection-limit", 8); -/* 2619: enforce Punycode for Internationalized Domain Names to eliminate possible spoofing - * Firefox has *some* protections, but it is better to be safe than sorry +/* 2616: remove special permissions for certain mozilla domains [FF35+] + * [1] resource://app/defaults/permissions ***/ +user_pref("permissions.manager.defaultsUrl", ""); +/* 2617: remove webchannel whitelist ***/ +user_pref("webchannel.allowObject.urlWhitelist", ""); +/* 2619: use Punycode in Internationalized Domain Names to eliminate possible spoofing * [SETUP-WEB] Might be undesirable for non-latin alphabet users since legitimate IDN's are also punycoded * [TEST] https://www.xn--80ak6aa92e.com/ (www.apple.com) * [1] https://wiki.mozilla.org/IDN_Display_Algorithm * [2] https://en.wikipedia.org/wiki/IDN_homograph_attack - * [3] CVE-2017-5383: https://www.mozilla.org/security/advisories/mfsa2017-02/ + * [3] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=punycode+firefox * [4] https://www.xudongz.com/blog/2017/idn-phishing/ ***/ user_pref("network.IDN_show_punycode", true); -/* 2622: enforce no system colors; they can be fingerprinted - * [SETTING] General>Language and Appearance>Fonts and Colors>Colors>Use system colors ***/ -user_pref("browser.display.use_system_colors", false); // [DEFAULT: false] +/* 2620: enforce PDFJS, disable PDFJS scripting [SETUP-CHROME] + * This setting controls if the option "Display in Thunderbird" is available in the setting below + * and by effect controls whether PDFs are handled in-browser or externally ("Ask" or "Open With") + * PROS: pdfjs is lightweight, open source, and more secure/vetted than most + * Exploits are rare (one serious case in seven years), treated seriously and patched quickly. + * It doesn't break "state separation" of browser content (by not sharing with OS, independent apps). + * It maintains disk avoidance and application data isolation. It's convenient. You can still save to disk. + * CONS: You may prefer a different pdf reader for security reasons + * CAVEAT: JS can still force a pdf to open in-browser by bundling its own code ***/ +user_pref("pdfjs.disabled", false); // [DEFAULT: false] +user_pref("pdfjs.enableScripting", false); // [FF86+] +/* 2621: disable links launching Windows Store on Windows 8/8.1/10 [WINDOWS] ***/ +user_pref("network.protocol-handler.external.ms-windows-store", false); +/* 2623: disable permissions delegation [FF73+] + * Currently applies to cross-origin geolocation, camera, mic and screen-sharing + * permissions, and fullscreen requests. Disabling delegation means any prompts + * for these will show/use their correct 3rd party origin + * [1] https://groups.google.com/forum/#!topic/mozilla.dev.platform/BdFOMAuCGW8/discussion ***/ +user_pref("permissions.delegation.enabled", false); /** DOWNLOADS ***/ -/* 2650: discourage downloading to desktop - * 0=desktop, 1=downloads (default), 2=last used - * [SETTING] To set your default "downloads": General>Downloads>Save files to ***/ - // user_pref("browser.download.folderList", 2); -/* 2651: enforce user interaction for security by always asking where to download - * [SETUP-CHROME] On Android this blocks longtapping and saving images - * [SETTING] General>Downloads>Always ask you where to save files ***/ +/* 2651: enable user interaction for security by always asking where to download + * [SETUP-CHROME] On Android this blocks longtapping and saving images ***/ user_pref("browser.download.useDownloadDir", false); /* 2652: disable adding downloads to the system's "recent documents" list ***/ user_pref("browser.download.manager.addToRecentDocs", false); -/* 2653: disable hiding mime types (Options>General>Applications) not associated with a plugin ***/ -user_pref("browser.download.hide_plugins_without_extensions", false); -/* 2654: disable "open with" in download dialog [FF50+] [SETUP-HARDEN] - * This is very useful to enable when the browser is sandboxed (e.g. via AppArmor) - * in such a way that it is forbidden to run external applications. - * [WARNING] This may interfere with some users' workflow or methods - * [1] https://bugzilla.mozilla.org/1281959 ***/ - // user_pref("browser.download.forbid_open_with", true); /** EXTENSIONS ***/ /* 2660: lock down allowed extension directories * [SETUP-CHROME] This will break extensions, language packs, themes and any other * XPI files which are installed outside of profile and application directories * [1] https://mike.kaply.com/2012/02/21/understanding-add-on-scopes/ - * [1] archived: https://archive.is/DYjAM ***/ -user_pref("extensions.enabledScopes", 1); // [HIDDEN PREF] + * [1] https://archive.is/DYjAM (archived) ***/ +user_pref("extensions.enabledScopes", 5); // [HIDDEN PREF] user_pref("extensions.autoDisableScopes", 15); // [DEFAULT: 15] /* 2662: disable webextension restrictions on certain mozilla domains (you also need 4503) [FF60+] * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1384330,1406795,1415644,1453988 ***/ // user_pref("extensions.webextensions.restrictedDomains", ""); -/** SECURITY ***/ -/* 2680: enforce CSP (Content Security Policy) - * [WARNING] CSP is a very important and widespread security feature. Don't disable it! - * [1] https://developer.mozilla.org/docs/Web/HTTP/CSP ***/ -user_pref("security.csp.enable", true); // [DEFAULT: true] -/* 2684: enforce a security delay on some confirmation dialogs such as install, open/save - * [1] https://www.squarefree.com/2004/07/01/race-conditions-in-security-dialogs/ ***/ -user_pref("security.dialog_enable_delay", 700); - /*** [SECTION 2700]: PERSISTENT STORAGE - Data SET by websites including - cookies : profile\cookies.sqlite - localStorage : profile\webappsstore.sqlite - indexedDB : profile\storage\default - appCache : profile\OfflineCache - serviceWorkers : + Data SET by websites including + cookies : profile\cookies.sqlite + localStorage : profile\webappsstore.sqlite + indexedDB : profile\storage\default + serviceWorkers : - [NOTE] indexedDB and serviceWorkers are not available in Private Browsing Mode - [NOTE] Blocking cookies also blocks websites access to: localStorage (incl. sessionStorage), - indexedDB, sharedWorker, and serviceWorker (and therefore service worker cache and notifications) - If you set a site exception for cookies (either "Allow" or "Allow for Session") then they become - accessible to websites except shared/service workers where the cookie setting *must* be "Allow" + [NOTE] indexedDB and serviceWorkers are not available in Private Browsing Mode + [NOTE] Blocking cookies also blocks websites access to: localStorage (incl. sessionStorage), + indexedDB, sharedWorker, and serviceWorker (and therefore service worker cache and notifications) + If you set a site exception for cookies (either "Allow" or "Allow for Session") then they become + accessible to websites except shared/service workers where the cookie setting must be "Allow" ***/ user_pref("_user.js.parrot", "2700 syntax error: the parrot's joined the bleedin' choir invisible!"); -/* 2701: disable cookies and site-data [SETUP-WEB] - * 0=Accept cookies and site data, 1=(Block) All third-party cookies, 2=(Block) All cookies, - * 3=(Block) Cookies from unvisited websites, 4=(Block) Cross-site and social media trackers (FF63+) (default FF69+) - * [NOTE] You can set exceptions under site permissions or use an extension - * [NOTE] Unlike arkenfox/user.js, we block **ALL** cookies on purpose - * [SETTING] Privacy & Security>Privacy>Web Content>Accept cookies from sites ***/ +/* 2701: disable or isolate 3rd-party cookies and site-data [SETUP-WEB] + * 0 = Accept cookies and site data + * 1 = (Block) All third-party cookies + * 2 = (Block) All cookies + * 3 = (Block) Cookies from unvisited websites + * 4 = (Block) Cross-site tracking cookies (default) + * 5 = (Isolate All) Cross-site cookies (TCP: Total Cookie Protection / dFPI: dynamic FPI) [1] (FF86+) + * Option 5 with FPI enabled (4001) is ignored and not shown, and option 4 used instead + * [NOTE] You can set cookie exceptions under site permissions or use an extension + * [NOTE] Enforcing category to custom ensures ETP related prefs are always honored + * [SETTING] Privacy & Security > Privacy > Web Content > Accept cookies from sites + * [1] https://blog.mozilla.org/security/2021/02/23/total-cookie-protection/ ***/ user_pref("network.cookie.cookieBehavior", 2); -/* 2702: set third-party cookies (i.e ALL) (if enabled, see 2701) to session-only - and (FF58+) set third-party non-secure (i.e HTTP) cookies to session-only - [NOTE] .sessionOnly overrides .nonsecureSessionOnly except when .sessionOnly=false and - .nonsecureSessionOnly=true. This allows you to keep HTTPS cookies, but session-only HTTP ones +user_pref("browser.contentblocking.category", "custom"); +/* 2702: set third-party cookies (if enabled, see 2701) to session-only + * [NOTE] .sessionOnly overrides .nonsecureSessionOnly except when .sessionOnly=false and + * .nonsecureSessionOnly=true. This allows you to keep HTTPS cookies, but session-only HTTP ones * [1] https://feeding.cloud.geek.nz/posts/tweaking-cookies-for-privacy-in-firefox/ ***/ user_pref("network.cookie.thirdparty.sessionOnly", true); user_pref("network.cookie.thirdparty.nonsecureSessionOnly", true); // [FF58+] /* 2703: delete cookies and site data on close * 0=keep until they expire (default), 2=keep until you close Thunderbird * [NOTE] The setting below is disabled (but not changed) if you block all cookies (2701 = 2) - * [NOTE] Unlike arkenfox/user.js, we keep them until Thunderbird exit on purpose - * [SETTING] Privacy & Security>Privacy>Web Content>Keep until: "I close Thunderbird" ***/ + * [SETTING] Privacy & Security > Privacy > Web Content > Keep until: "I close Thunderbird" ***/ user_pref("network.cookie.lifetimePolicy", 2); -/* 2710: disable DOM (Document Object Model) Storage - * [WARNING] This will break a LOT of sites' functionality AND extensions! - * You are better off using an extension for more granular control ***/ -user_pref("dom.storage.enabled", false); -/* 2730: disable offline cache ***/ -user_pref("browser.cache.offline.enable", false); +/* 2710: enable Enhanced Tracking Protection (ETP) in all windows ***/ +user_pref("privacy.trackingprotection.enabled", true); +/* 2711: enable various ETP lists ***/ +user_pref("privacy.trackingprotection.socialtracking.enabled", true); +user_pref("privacy.trackingprotection.cryptomining.enabled", true); // [DEFAULT: true] +user_pref("privacy.trackingprotection.fingerprinting.enabled", true); // [DEFAULT: true] /* 2740: disable service worker cache and cache storage - * [NOTE] We clear service worker cache on exiting Firefox (see 2803) - * [NOTE] Unlike arkenfox/user.js, we explicitly disable it + * [NOTE] We clear service worker cache on exit (2803) * [1] https://w3c.github.io/ServiceWorker/#privacy ***/ user_pref("dom.caches.enabled", false); /* 2750: disable Storage API [FF51+] @@ -1101,24 +836,25 @@ user_pref("dom.caches.enabled", false); * [3] https://blog.mozilla.org/l10n/2017/03/07/firefox-l10n-report-aurora-54/ ***/ user_pref("dom.storageManager.enabled", false); /* 2755: disable Storage Access API [FF65+] - * [1] https://developer.mozilla.org/en-US/docs/Web/API/Storage_Access_API ***/ - // user_pref("dom.storage_access.enabled", false); // [DEFAULT: false] + * [1] https://developer.mozilla.org/docs/Web/API/Storage_Access_API ***/ +user_pref("dom.storage_access.enabled", false); +/* 2760: enable Local Storage Next Generation (LSNG) [FF65+] ***/ +user_pref("dom.storage.next_gen", true); // [DEFAULT: true FF92+] /*** [SECTION 2800]: SHUTDOWN - You should set the values to what suits you best. - - "Offline Website Data" includes appCache (2730), localStorage (2710), - service worker cache (2740), and QuotaManager (IndexedDB (2720), asm-cache) - - In both 2803 + 2804, the 'download' and 'history' prefs are combined in the - Firefox interface as "Browsing & Download History" and their values will be synced + * Sanitizing on shutdown is all or nothing (no exception can be set) + * If you want to keep some sites' cookies (exception as "Allow") and optionally other site + data but clear all the rest on close, then you need to set the "cookie" and optionally the + "offlineApps" prefs below to false, and to set the cookie lifetime pref to 2 (2703) ***/ user_pref("_user.js.parrot", "2800 syntax error: the parrot's bleedin' demised!"); /* 2802: enable Thunderbird to clear items on shutdown (see 2803) ***/ user_pref("privacy.sanitize.sanitizeOnShutdown", true); /* 2803: set what items to clear on shutdown (if 2802 is true) [SETUP-CHROME] - * [NOTE] If 'history' is true, downloads will also be cleared regardless of the value - * but if 'history' is false, downloads can still be cleared independently - * However, this may not always be the case. The interface combines and syncs these - * prefs when set from there, and the sanitize code may change at any time ***/ + * [NOTE] If "history" is true, downloads will also be cleared + * [NOTE] Active Logins: does not refer to logins via cookies, but rather HTTP Basic Authentication [1] + * [NOTE] Offline Website Data: localStorage, service worker cache, QuotaManager (IndexedDB, asm-cache) + * [1] https://en.wikipedia.org/wiki/Basic_access_authentication ***/ user_pref("privacy.clearOnShutdown.cache", true); user_pref("privacy.clearOnShutdown.cookies", true); user_pref("privacy.clearOnShutdown.downloads", true); // see note above @@ -1129,301 +865,449 @@ user_pref("privacy.clearOnShutdown.sessions", true); // Active Logins user_pref("privacy.clearOnShutdown.siteSettings", false); // Site Preferences /* 2804: reset default items to clear with Ctrl-Shift-Del (to match 2803) [SETUP-CHROME] * This dialog can also be accessed from the menu History>Clear Recent History - * Firefox remembers your last choices. This will reset them when you start Firefox. - * [NOTE] Regardless of what you set privacy.cpd.downloads to, as soon as the dialog - * for "Clear Recent History" is opened, it is synced to the same as 'history' ***/ + * Thunderbird remembers your last choices. This will reset them when you start Thunderbird + * [NOTE] Regardless of what you set "downloads" to, as soon as the dialog + * for "Clear Recent History" is opened, it is synced to the same as "history" ***/ user_pref("privacy.cpd.cache", true); user_pref("privacy.cpd.cookies", true); + // user_pref("privacy.cpd.downloads", true); // not used, see note above +user_pref("privacy.cpd.formdata", true); // Form & Search History user_pref("privacy.cpd.history", true); // Browsing & Download History -/* 2806: reset default 'Time range to clear' for 'Clear Recent History' (see 2804) - * Firefox remembers your last choice. This will reset the value when you start Firefox. - * 0=everything, 1=last hour, 2=last two hours, 3=last four hours, - * 4=today, 5=last five minutes, 6=last twenty-four hours - * [NOTE] The values 5 + 6 are not listed in the dropdown, which will display a - * blank value if they are used, but they do work as advertised ***/ +user_pref("privacy.cpd.offlineApps", true); // Offline Website Data +user_pref("privacy.cpd.passwords", false); // this is not listed +user_pref("privacy.cpd.sessions", true); // Active Logins +user_pref("privacy.cpd.siteSettings", false); // Site Preferences +/* 2805: clear Session Restore data when sanitizing on shutdown or manually [FF34+] + * [NOTE] Not needed if Session Restore is not used (0102) or is already cleared with history (2803) + * [NOTE] privacy.clearOnShutdown.openWindows prevents resuming from crashes (also see 5008) + * [NOTE] privacy.cpd.openWindows has a bug that causes an additional window to open ***/ + // user_pref("privacy.clearOnShutdown.openWindows", true); + // user_pref("privacy.cpd.openWindows", true); +/* 2806: reset default "Time range to clear" for "Clear Recent History" (2804) + * Thunderbird remembers your last choice. This will reset the value when you start Thunderbird + * 0=everything, 1=last hour, 2=last two hours, 3=last four hours, 4=today + * [NOTE] Values 5 (last 5 minutes) and 6 (last 24 hours) are not listed in the dropdown, + * which will display a blank value, and are not guaranteed to work ***/ user_pref("privacy.sanitize.timeSpan", 0); /*** [SECTION 4000]: FPI (FIRST PARTY ISOLATION) - ** 1278037 - isolate indexedDB (FF51+) - ** 1277803 - isolate favicons (FF52+) - ** 1264562 - isolate OCSP cache (FF52+) - ** 1268726 - isolate Shared Workers (FF52+) - ** 1316283 - isolate SSL session cache (FF52+) - ** 1317927 - isolate media cache (FF53+) - ** 1323644 - isolate HSTS and HPKP (FF54+) - ** 1334690 - isolate HTTP Alternative Services (FF54+) - ** 1334693 - isolate SPDY/HTTP2 (FF55+) - ** 1337893 - isolate DNS cache (FF55+) - ** 1344170 - isolate blob: URI (FF55+) - ** 1300671 - isolate data:, about: URLs (FF55+) - ** 1473247 - isolate IP addresses (FF63+) - ** 1492607 - isolate postMessage with targetOrigin "*" (requires 4002) (FF65+) - ** 1542309 - isolate top-level domain URLs when host is in the public suffix list (FF68+) - ** 1506693 - isolate pdfjs range-based requests (FF68+) - ** 1330467 - isolate site permissions (FF69+) - ** 1534339 - isolate IPv6 (FF73+) + 1278037 - indexedDB (FF51+) + 1277803 - favicons (FF52+) + 1264562 - OCSP cache (FF52+) + 1268726 - Shared Workers (FF52+) + 1316283 - SSL session cache (FF52+) + 1317927 - media cache (FF53+) + 1323644 - HSTS and HPKP (FF54+) + 1334690 - HTTP Alternative Services (FF54+) + 1334693 - SPDY/HTTP2 (FF55+) + 1337893 - DNS cache (FF55+) + 1344170 - blob: URI (FF55+) + 1300671 - data:, about: URLs (FF55+) + 1473247 - IP addresses (FF63+) + 1542309 - top-level domain URLs when host is in the public suffix list (FF68+) + 1506693 - pdfjs range-based requests (FF68+) + 1330467 - site permissions (FF69+) + 1534339 - IPv6 (FF73+) + 1721858 - WebSocket (FF92+) ***/ user_pref("_user.js.parrot", "4000 syntax error: the parrot's pegged out"); /* 4001: enable First Party Isolation [FF51+] - * [SETUP-WEB] May break cross-domain logins and site functionality until perfected - * [1] https://bugzilla.mozilla.org/1260931 ***/ + * [SETUP-WEB] Breaks some cross-origin logins + * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1260931,1299996 ***/ user_pref("privacy.firstparty.isolate", true); /* 4002: enforce FPI restriction for window.opener [FF54+] * [NOTE] Setting this to false may reduce the breakage in 4001 - * [NOTE] Unlike arkenfox/user.js, we explicitly set them * FF65+ blocks postMessage with targetOrigin "*" if originAttributes don't match. But - * to reduce breakage it ignores the 1st-party domain (FPD) originAttribute. (see [2],[3]) - * The 2nd pref removes that limitation and will only allow communication if FPDs also match. + * to reduce breakage it ignores the 1st-party domain (FPD) originAttribute [2][3] + * The 2nd pref removes that limitation and will only allow communication if FPDs also match * [1] https://bugzilla.mozilla.org/1319773#c22 * [2] https://bugzilla.mozilla.org/1492607 - * [3] https://developer.mozilla.org/en-US/docs/Web/API/Window/postMessage ***/ + * [3] https://developer.mozilla.org/docs/Web/API/Window/postMessage ***/ user_pref("privacy.firstparty.isolate.restrict_opener_access", true); // [DEFAULT: true] -user_pref("privacy.firstparty.isolate.block_post_message", true); // [HIDDEN PREF ESR] +user_pref("privacy.firstparty.isolate.block_post_message", true); +/* 4003: enable scheme with FPI [FF78+] + * [NOTE] Experimental: existing data and site permissions are incompatible + * and some site exceptions may not work e.g. HTTPS-only mode (1244) ***/ +user_pref("privacy.firstparty.isolate.use_site", true); /*** [SECTION 4500]: RFP (RESIST FINGERPRINTING) - This master switch will be used for a wide range of items, many of which will - **override** existing prefs from FF55+, often providing a **better** solution + RFP covers a wide range of ongoing fingerprinting solutions. + It is an all-or-nothing buy in: you cannot pick and choose what parts you want - IMPORTANT: As existing prefs become redundant, and some of them WILL interfere - with how RFP works, they will be moved to section 4600 and made inactive + [WARNING] DO NOT USE extensions to alter RFP protected metrics - ** 418986 - limit window.screen & CSS media queries leaking identifiable info (FF41+) - [NOTE] Info only: To set a size, open a XUL (chrome) page (such as about:config) which is at - 100% zoom, hit Shift+F4 to open the scratchpad, type window.resizeTo(1366,768), hit Ctrl+R to run. - Test your window size, do some math, resize to allow for all the non inner window elements + 418986 - limit window.screen & CSS media queries (FF41) [TEST] https://arkenfox.github.io/TZP/tzp.html#screen - ** 1281949 - spoof screen orientation (FF50+) - ** 1281963 - hide the contents of navigator.plugins and navigator.mimeTypes (FF50+) - FF53: Fixes GetSupportedNames in nsMimeTypeArray and nsPluginArray (1324044) - ** 1330890 - spoof timezone as UTC 0 (FF55+) - FF58: Date.toLocaleFormat deprecated (818634) - FF60: Date.toLocaleDateString and Intl.DateTimeFormat fixed (1409973) - ** 1360039 - spoof navigator.hardwareConcurrency as 2 (see 4601) (FF55+) - This spoof *shouldn't* affect core chrome/Firefox performance - ** 1217238 - reduce precision of time exposed by javascript (FF55+) - ** 1369303 - spoof/disable performance API (see 2410-deprecated, 4602, 4603) (FF56+) - ** 1333651 & 1383495 & 1396468 - spoof User Agent & Navigator API (see section 4700) (FF56+) - FF56: Version: rounded down to the nearest multiple of 10 - FF57: Version: match current ESR (1393283, 1418672, 1418162, 1511763) - FF59: OS: Windows, OSX, Android, or Linux (to reduce breakage) (1404608) - FF66: OS: HTTP Headers reduced to Windows or Android (1509829) - FF68: OS: updated to Windows 10, OS 10.14, and Android 8.1 (1511434) - FF78: OS: updated to OS 10.15 and Android 9.0 (1635011) - ** 1369319 - disable device sensor API (see 4604) (FF56+) - ** 1369357 - disable site specific zoom (see 4605) (FF56+) - ** 1337161 - hide gamepads from content (see 4606) (FF56+) - ** 1372072 - spoof network information API as "unknown" when dom.netinfo.enabled = true (see 4607) (FF56+) - ** 1333641 - reduce fingerprinting in WebSpeech API (see 4608) (FF56+) - ** 1372069 & 1403813 & 1441295 - block geolocation requests (same as denying a site permission) (see 0201 ** 1372069 & 1403813 & 1441295 - block geolocation requests (same as denying a site permission) (see 0201, 0202) (FF56-62) - ** 1369309 - spoof media statistics (see 4610) (FF57+) - ** 1382499 - reduce screen co-ordinate fingerprinting in Touch API (see 4611) (FF57+) - ** 1217290 & 1409677 - enable fingerprinting resistance for WebGL (see 2010-12) (FF57+) - ** 1382545 - reduce fingerprinting in Animation API (FF57+) - ** 1354633 - limit MediaError.message to a whitelist (FF57+) - ** 1382533 - enable fingerprinting resistance for Presentation API (FF57+) - This blocks exposure of local IP Addresses via mDNS (Multicast DNS) - ** 967895 - spoof canvas and enable site permission prompt before allowing canvas data extraction (FF58+) - FF59: Added to site permissions panel (1413780) Only prompt when triggered by user input (1376865) - ** 1372073 - spoof/block fingerprinting in MediaDevices API (FF59+) - Spoof: enumerate devices reports one "Internal Camera" and one "Internal Microphone" if - media.navigator.enabled is true (see 2505 which we chose to keep disabled) - Block: suppresses the ondevicechange event (see 4612) - ** 1039069 - warn when language prefs are set to non en-US (see 0210, 0211) (FF59+) - ** 1222285 & 1433592 - spoof keyboard events and suppress keyboard modifier events (FF59+) + 1281949 - spoof screen orientation (FF50) + 1281963 - hide contents of navigator.plugins and navigator.mimeTypes (FF50-88) + 1330890 - spoof timezone as UTC0 (FF55) + 1360039 - spoof navigator.hardwareConcurrency as 2 (FF55) + 1217238 - reduce precision of time exposed by javascript (FF55) + FF56 + 1369303 - spoof/disable performance API + 1333651 - spoof User Agent & Navigator API + JS: FF91+ the version is spoofed as ESR, and the OS as Windows 10, OS 10.15, Android 10, or Linux + HTTP Headers: spoofed as Windows or Android + 1369319 - disable device sensor API + 1369357 - disable site specific zoom + 1337161 - hide gamepads from content + 1372072 - spoof network information API as "unknown" when dom.netinfo.enabled = true + 1333641 - reduce fingerprinting in WebSpeech API + FF57 + 1369309 - spoof media statistics + 1382499 - reduce screen co-ordinate fingerprinting in Touch API + 1217290 & 1409677 - enable some fingerprinting resistance for WebGL + 1382545 - reduce fingerprinting in Animation API + 1354633 - limit MediaError.message to a whitelist + 1382533 & 1697680 - enable fingerprinting resistance for Presentation API (FF57-87) + Blocks exposure of local IP Addresses via mDNS (Multicast DNS) + FF58-90 + 967895 - spoof canvas and enable site permission prompt (FF58) + 1372073 - spoof/block fingerprinting in MediaDevices API (FF59) + Spoof: enumerate devices as one "Internal Camera" and one "Internal Microphone" + Block: suppresses the ondevicechange event + 1039069 - warn when language prefs are not set to "en*" (also see 0210, 0211) (FF59) + 1222285 & 1433592 - spoof keyboard events and suppress keyboard modifier events (FF59) Spoofing mimics the content language of the document. Currently it only supports en-US. Modifier events suppressed are SHIFT and both ALT keys. Chrome is not affected. - FF60: Fix keydown/keyup events (1438795) - ** 1337157 - disable WebGL debug renderer info (see 4613) (FF60+) - ** 1459089 - disable OS locale in HTTP Accept-Language headers (ANDROID) (FF62+) - ** 1479239 - return "no-preference" with prefers-reduced-motion (see 4617) (FF63+) - ** 1363508 - spoof/suppress Pointer Events (see 4614) (FF64+) - FF65: pointerEvent.pointerid (1492766) - ** 1485266 - disable exposure of system colors to CSS or canvas (see 4615) (FF67+) - ** 1407366 - enable inner window letterboxing (see 4504) (FF67+) - ** 1494034 - return "light" with prefers-color-scheme (see 4616) (FF67+) - [1] https://developer.mozilla.org/en-US/docs/Web/CSS/@media/prefers-color-scheme - ** 1564422 - spoof audioContext outputLatency (FF70+) - ** 1595823 - spoof audioContext sampleRate (FF72+) - ** 1607316 - spoof pointer as coarse and hover as none (ANDROID) (FF74+) - ** 1621433 - randomize canvas (previously FF58+ returned an all-white canvas) (FF78+) + 1337157 - disable WebGL debug renderer info (FF60) + 1459089 - disable OS locale in HTTP Accept-Language headers (ANDROID) (FF62) + 1479239 - return "no-preference" with prefers-reduced-motion (FF63) + 1363508 - spoof/suppress Pointer Events (FF64) + 1492766 - spoof pointerEvent.pointerid (FF65) + 1485266 - disable exposure of system colors to CSS or canvas (FF67) + 1494034 - return "light" with prefers-color-scheme (FF67) + 1564422 - spoof audioContext outputLatency (FF70) + 1595823 - return audioContext sampleRate as 44100 (FF72) + 1607316 - spoof pointer as coarse and hover as none (ANDROID) (FF74) + 1621433 - randomize canvas (previously FF58+ returned an all-white canvas) (FF78) + 1653987 - limit font visibility to bundled and "Base Fonts" (Windows, Mac, some Linux) (FF80) + 1461454 - spoof smooth=true and powerEfficient=false for supported media in MediaCapabilities (FF82) + FF91+ + 531915 - use fdlibm's sin, cos and tan in jsmath (FF93, ESR91.1) ***/ user_pref("_user.js.parrot", "4500 syntax error: the parrot's popped 'is clogs"); /* 4501: enable privacy.resistFingerprinting [FF41+] - * This pref is the master switch for all other privacy.resist* prefs unless stated - * [SETUP-WEB] RFP can cause the odd website to break in strange ways, and has a few side affects, - * but is largely robust nowadays. Give it a try. Your choice. Also see 4504 (letterboxing). - * [NOTE] This feature currently breaks Text & Background colors settings ("Fonts & Colors"), see [2]. - * [1] https://bugzilla.mozilla.org/418986 - * [2] https://bugzilla.mozilla.org/1600074 ***/ + * [SETUP-WEB] RFP can cause some website breakage: mainly canvas, use a site exception via the urlbar + * RFP also has a few side effects: mainly timezone is UTC0, and websites will prefer light theme + * [1] https://bugzilla.mozilla.org/418986 ***/ user_pref("privacy.resistFingerprinting", true); /* 4502: set new window sizes to round to hundreds [FF55+] [SETUP-CHROME] * Width will round down to multiples of 200s and height to 100s, to fit your screen. - * The override values are a starting point to round from if you want some control - * [1] https://bugzilla.mozilla.org/1330882 - * [2] https://hardware.metrics.mozilla.com/ ***/ + * The max values are a starting point to round from if you want some control + * [1] https://bugzilla.mozilla.org/1330882 ***/ // user_pref("privacy.window.maxInnerWidth", 1000); // user_pref("privacy.window.maxInnerHeight", 1000); /* 4503: disable mozAddonManager Web API [FF57+] - * [NOTE] As a side-effect in FF57-59 this allowed extensions to work on AMO. In FF60+ you also need - * to sanitize or clear extensions.webextensions.restrictedDomains (see 2662) to keep that side-effect + * [NOTE] To allow extensions to work on AMO, you also need 2662 * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1384330,1406795,1415644,1453988 ***/ user_pref("privacy.resistFingerprinting.block_mozAddonManager", true); // [HIDDEN PREF] -/* 4520: disable chrome animations [FF77+] [RESTART] - * [NOTE] pref added in FF63, but applied to chrome in FF77. RFP spoofs this for web content ***/ -user_pref("ui.prefersReducedMotion", 1); // [HIDDEN PREF] +/* 4504: enable RFP letterboxing [FF67+] + * Dynamically resizes the inner window by applying margins in stepped ranges [2] + * If you use the dimension pref, then it will only apply those resolutions. + * The format is "width1xheight1, width2xheight2, ..." (e.g. "800x600, 1000x1000") + * [SETUP-WEB] This is independent of RFP (4501). If you're not using RFP, or you are but + * dislike the margins, then flip this pref, keeping in mind that it is effectively fingerprintable + * [WARNING] DO NOT USE: the dimension pref is only meant for testing + * [1] https://bugzilla.mozilla.org/1407366 + * [2] https://hg.mozilla.org/mozilla-central/rev/6d2d7856e468#l2.32 ***/ +user_pref("privacy.resistFingerprinting.letterboxing", true); // [HIDDEN PREF] + // user_pref("privacy.resistFingerprinting.letterboxing.dimensions", ""); // [HIDDEN PREF] +/* 4505: experimental RFP [FF91+] + * [WARNING] DO NOT USE unless testing, see [1] comment 12 + * [1] https://bugzilla.mozilla.org/1635603 ***/ + // user_pref("privacy.resistFingerprinting.exemptedDomains", "*.example.invalid"); + // user_pref("privacy.resistFingerprinting.testGranularityMask", 0); +/* 4510: enforce no system colors + * [SETTING] General > Language & Appearance > Colors... > Use system colors ***/ +user_pref("browser.display.use_system_colors", false); // [DEFAULT: false] +/* 4511: enforce non-native widget theme + * Security: removes/reduces system API calls, e.g. win32k API [1] + * Fingerprinting: provides a uniform look and feel across platforms [2] + * [1] https://bugzilla.mozilla.org/1381938 + * [2] https://bugzilla.mozilla.org/1411425 ***/ +user_pref("widget.non-native-theme.enabled", true); // [DEFAULT: true] +/* 4512: enforce links targeting new windows to open in a new tab instead + * 1=most recent window or tab, 2=new window, 3=new tab + * Stops malicious window sizes and some screen resolution leaks. + * You can still right-click a link and open in a new window + * [TEST] https://arkenfox.github.io/TZP/tzp.html#screen + * [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/9881 ***/ +user_pref("browser.link.open_newwindow", 3); // [DEFAULT: 3] +/* 4513: set all open window methods to abide by "browser.link.open_newwindow" (4512) + * [1] https://searchfox.org/mozilla-central/source/dom/tests/browser/browser_test_new_window_from_content.js ***/ +user_pref("browser.link.open_newwindow.restriction", 0); // [DEFAULT: 0] +/* 4520: disable WebGL (Web Graphics Library) + * [SETUP-WEB] If you need it then enable it. RFP still randomizes canvas for naive scripts ***/ +user_pref("webgl.disabled", true); -/*** [SECTION 4600]: RFP ALTERNATIVES - * non-RFP users: - Enable the whole section (see the SETUP tag below) - * RFP users: - Make sure these are reset in about:config. They are redundant. In fact, some - even cause RFP to not behave as you would expect and alter your fingerprint - * ESR RFP users: - Reset those *up to and including* your version. Add those *after* your version - as active prefs in your overrides. This is assuming that the patch wasn't also - backported to Firefox ESR. Backporting RFP patches to ESR is rare. +/*** [SECTION 5000]: OPTIONAL OPSEC + Disk avoidance, application data isolation, eyeballs... ***/ -user_pref("_user.js.parrot", "4600 syntax error: the parrot's crossed the Jordan"); -/* [SETUP-non-RFP] Non-RFP users replace the * with a slash on this line to enable these -// FF55+ -// 4601: [2514] spoof (or limit?) number of CPU cores [FF48+] - // [NOTE] *may* affect core chrome/Firefox performance, will affect content. - // [1] https://bugzilla.mozilla.org/1008453 - // [2] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/21675 - // [3] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/22127 - // [4] https://html.spec.whatwg.org/multipage/workers.html#navigator.hardwareconcurrency - // user_pref("dom.maxHardwareConcurrency", 2); -// * * * / -// FF56+ -// 4602: [2411] disable resource/navigation timing -user_pref("dom.enable_resource_timing", false); -// 4603: [2412] disable timing attacks - // [1] https://wiki.mozilla.org/Security/Reviews/Firefox/NavigationTimingAPI -user_pref("dom.enable_performance", false); -// 4604: [2512] disable device sensor API - // Optional protection depending on your device - // [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/15758 - // [2] https://blog.lukaszolejnik.com/stealing-sensitive-browser-data-with-the-w3c-ambient-light-sensor-api/ - // [3] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1357733,1292751 +user_pref("_user.js.parrot", "5000 syntax error: the parrot's taken 'is last bow"); +/* 5001: start Thunderbird in PB (Private Browsing) mode + * [NOTE] In this mode all windows are "private windows" and the PB mode icon is not displayed + * [NOTE] The P in PB mode can be misleading: it means no "persistent" disk state such as history, + * caches, searches, cookies, localStorage, IndexedDB etc (which you can achieve in normal mode). + * In fact, PB mode limits or removes the ability to control some of these, and you need to quit + * Thunderbird to clear them. PB is best used as a one off window (Menu>New Private Window) to provide + * a temporary self-contained new session. Close all Private Windows to clear the PB mode session. + * [1] https://wiki.mozilla.org/Private_Browsing + * [2] https://support.mozilla.org/kb/common-myths-about-private-browsing ***/ + // user_pref("browser.privatebrowsing.autostart", true); +/* 5002: disable memory cache + * capacity: -1=determine dynamically (default), 0=none, n=memory capacity in kibibytes ***/ +user_pref("browser.cache.memory.enable", false); +user_pref("browser.cache.memory.capacity", 0); +/* 5003: disable saving passwords + * [NOTE] This does not clear any passwords already saved ***/ +user_pref("signon.rememberSignons", false); +/* 5004: disable permissions manager from writing to disk [FF41+] [RESTART] + * [NOTE] This means any permission changes are session only + * [1] https://bugzilla.mozilla.org/967812 ***/ +user_pref("permissions.memory_only", true); // [HIDDEN PREF] +/* 5005: disable intermediate certificate caching [FF41+] [RESTART] + * [NOTE] This affects login/cert/key dbs. The effect is all credentials are session-only. + * Saved logins and passwords are not available. Reset the pref and restart to return them ***/ + // user_pref("security.nocertdb", true); // [HIDDEN PREF] +/* 5006: disable favicons in history and bookmarks + * [NOTE] Stored as data blobs in favicons.sqlite, these don't reveal anything that your + * actual history (and bookmarks) already do. Your history is more detailed, so + * control that instead; e.g. disable history, clear history on close, use PB mode + * [NOTE] favicons.sqlite is sanitized on Thunderbird close ***/ +user_pref("browser.chrome.site_icons", false); +/* 5007: exclude "Undo Closed Tabs" in Session Restore ***/ +user_pref("browser.sessionstore.max_tabs_undo", 0); +/* 5008: disable resuming session from crash ***/ +user_pref("browser.sessionstore.resume_from_crash", false); +/* 5009: disable "open with" in download dialog [FF50+] + * Application data isolation [1] + * [1] https://bugzilla.mozilla.org/1281959 ***/ + // user_pref("browser.download.forbid_open_with", true); +/* 5013: disable browsing and download history + * [NOTE] We also clear history and downloads on exit (2803) ***/ +user_pref("places.history.enabled", false); +/* 5016: discourage downloading to desktop + * 0=desktop, 1=downloads (default), 2=last used ***/ + // user_pref("browser.download.folderList", 2); + +/*** [SECTION 5500]: OPTIONAL HARDENING + Whereas not recommended by upstream arkenfox, we disable each one of those Web features + as we focus on keeping Thunderbird an email client and not a browser +***/ +user_pref("_user.js.parrot", "5500 syntax error: this is an ex-parrot!"); +/* 5501: disable MathML (Mathematical Markup Language) [FF51+] + * [1] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=mathml ***/ +user_pref("mathml.disabled", true); // 1173199 +/* 5502: disable in-content SVG (Scalable Vector Graphics) [FF53+] + * [1] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=firefox+svg ***/ +user_pref("svg.disabled", true); // 1216893 +/* 5503: disable graphite + * [1] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=firefox+graphite + * [2] https://en.wikipedia.org/wiki/Graphite_(SIL) ***/ +user_pref("gfx.font_rendering.graphite.enabled", false); +/* 5504: disable asm.js [FF22+] + * [1] http://asmjs.org/ + * [2] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=asm.js + * [3] https://rh0dev.github.io/blog/2017/the-return-of-the-jit/ ***/ +user_pref("javascript.options.asmjs", false); +/* 5505: disable Ion and baseline JIT to harden against JS exploits + * [NOTE] In FF75+, when **both** Ion and JIT are disabled, **and** the new + * hidden pref is enabled, then Ion can still be used by extensions (1599226) + * [1] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=firefox+jit ***/ +user_pref("javascript.options.ion", false); +user_pref("javascript.options.baselinejit", false); +user_pref("javascript.options.jit_trustedprincipals", true); // [FF75+] [HIDDEN PREF] +/* 5506: disable WebAssembly [FF52+] + * Vulnerabilities [1] have increasingly been found, including those known and fixed + * in native programs years ago [2]. WASM has powerful low-level access, making + * certain attacks (brute-force) and vulnerabilities more possible + * [STATS] ~0.2% of websites, about half of which are for crytomining / malvertising [2][3] + * [1] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=wasm + * [2] https://spectrum.ieee.org/tech-talk/telecom/security/more-worries-over-the-security-of-web-assembly + * [3] https://www.zdnet.com/article/half-of-the-websites-using-webassembly-use-it-for-malicious-purposes ***/ +user_pref("javascript.options.wasm", false); +/* 5590: show a prompt when opening a link in external applications ***/ +user_pref("security.external_protocol_requires_permission", true); + +/*** [SECTION 6000]: DON'T TOUCH ***/ +user_pref("_user.js.parrot", "6000 syntax error: the parrot's 'istory!"); +/* 6001: enforce Mozilla's blocklist + * [WHY] It includes updates for "revoked certificates" + * [1] https://blog.mozilla.org/security/2015/03/03/revoking-intermediate-certificates-introducing-onecrl/ ***/ +user_pref("extensions.blocklist.enabled", true); // [DEFAULT: true] +/* 6002: enforce no referer spoofing + * [WHY] Spoofing can affect CSRF (Cross-Site Request Forgery) protections ***/ +user_pref("network.http.referer.spoofSource", false); // [DEFAULT: false] +/* 6003: enforce CSP (Content Security Policy) + * [1] https://developer.mozilla.org/docs/Web/HTTP/CSP ***/ +user_pref("security.csp.enable", true); // [DEFAULT: true] +/* 6004: enforce a security delay on some confirmation dialogs such as install, open/save + * [1] https://www.squarefree.com/2004/07/01/race-conditions-in-security-dialogs/ ***/ +user_pref("security.dialog_enable_delay", 1000); // [DEFAULT: 1000] +/* 6005: enforce window.opener protection [FF65+] + * Makes rel=noopener implicit for target=_blank in anchor and area elements when no rel attribute is set ***/ +user_pref("dom.targetBlankNoOpener.enabled", true); // [DEFAULT: true FF79+] +/* 6006: enforce "window.name" protection [FF82+] + * If a new page from another domain is loaded into a tab, then window.name is set to an empty string. The original + * string is restored if the tab reverts back to the original page. This change prevents some cross-site attacks + * [TEST] https://arkenfox.github.io/TZP/tests/windownamea.html ***/ +user_pref("privacy.window.name.update.enabled", true); // [DEFAULT: true FF86+] +/* 6050: prefsCleaner: reset previously active items removed from arkenfox in 79-91 ***/ + // user_pref("browser.newtabpage.activity-stream.asrouter.providers.snippets", ""); + // user_pref("browser.send_pings.require_same_host", ""); + // user_pref("dom.allow_cut_copy", ""); + // user_pref("dom.vibrator.enabled", ""); + // user_pref("media.getusermedia.audiocapture.enabled", ""); + // user_pref("media.getusermedia.browser.enabled", ""); + // user_pref("media.getusermedia.screensharing.enabled", ""); + // user_pref("media.gmp-widevinecdm.visible", ""); + // user_pref("network.http.redirection-limit", ""); + // user_pref("privacy.partition.network_state", ""); + // user_pref("security.insecure_connection_icon.enabled", ""); // [DEFAULT: true FF70+] + // user_pref("security.mixed_content.block_active_content", ""); // [DEFAULT: true since at least FF60] + // user_pref("security.ssl.enable_ocsp_stapling", ""); // [DEFAULT: true FF26+] + // user_pref("webgl.disable-fail-if-major-performance-caveat", ""); // [DEFAULT: true FF86+] + // user_pref("webgl.enable-webgl2", ""); + // user_pref("webgl.min_capability_mode", ""); + +/*** [SECTION 7000]: DON'T BOTHER + Thunderbird-User.JS maintainer here : + Actually we do, TB is an e-mail client, not a (bloated) browser. + Thus some of below preferences have been set, despite upstream (Arkenfox) warnings. +***/ +user_pref("_user.js.parrot", "7000 syntax error: the parrot's pushing up daisies!"); +/* 7001: disable APIs + * Location-Aware Browsing, Full Screen, offline cache (appCache), Virtual Reality + * [WHY] The API state is easily fingerprintable. Geo and VR are behind prompts (7002). + * appCache storage capability was removed in FF90. Full screen requires user interaction ***/ +user_pref("geo.enabled", false); +user_pref("full-screen-api.enabled", false); +user_pref("browser.cache.offline.enable", false); +user_pref("dom.vr.enabled", false); +/* 7003: disable non-modern cipher suites [1] + * [WHY] Passive fingerprinting. Minimal/non-existent threat of downgrade attacks + * [1] https://browserleaks.com/ssl ***/ + // user_pref("security.ssl3.ecdhe_ecdsa_aes_256_sha", false); + // user_pref("security.ssl3.ecdhe_ecdsa_aes_128_sha", false); + // user_pref("security.ssl3.ecdhe_rsa_aes_128_sha", false); + // user_pref("security.ssl3.ecdhe_rsa_aes_256_sha", false); + // user_pref("security.ssl3.rsa_aes_128_gcm_sha256", false); // no PFS + // user_pref("security.ssl3.rsa_aes_256_gcm_sha384", false); // no PFS + // user_pref("security.ssl3.rsa_aes_128_sha", false); // no PFS + // user_pref("security.ssl3.rsa_aes_256_sha", false); // no PFS + // user_pref("security.ssl3.rsa_des_ede3_sha", false); // 3DES +/* 7004: control TLS versions + * [WHY] Passive fingerprinting. Downgrades are still possible: behind user interaction ***/ + // user_pref("security.tls.version.min", 3); // [DEFAULT: 3] + // user_pref("security.tls.version.max", 4); +/* 7005: disable SSL session IDs [FF36+] + * [WHY] Passive fingerprinting and perf costs. These are session-only and isolated + * with network partitioning (FF85+) or when using FPI and/or containers ***/ + // user_pref("security.ssl.disable_session_identifiers", true); // [HIDDEN PREF] +/* 7006: onions + * [WHY] Firefox doesn't support hidden services. Use Tor Browser ***/ + // user_pref("dom.securecontext.whitelist_onions", true); // 1382359 + // user_pref("network.http.referer.hideOnionSource", true); // 1305144 +/* 7007: referers + * [WHY] Only cross-origin referers (1600s) need control ***/ +user_pref("network.http.sendRefererHeader", 0); +user_pref("network.http.referer.trimmingPolicy", 0); +/* 7008: set the default Referrer Policy [FF59+] + * 0=no-referer, 1=same-origin, 2=strict-origin-when-cross-origin, 3=no-referrer-when-downgrade + * [WHY] Defaults are fine. They can be overridden by a site-controlled Referrer Policy ***/ +user_pref("network.http.referer.defaultPolicy", 0); // [DEFAULT: 2 FF87+] +user_pref("network.http.referer.defaultPolicy.pbmode", 0); // [DEFAULT: 2] +/* 7009: disable HTTP2 + * [WHY] Passive fingerprinting. ~50% of sites use HTTP2 [1] + * [1] https://w3techs.com/technologies/details/ce-http2/all/all ***/ + // user_pref("network.http.spdy.enabled", false); + // user_pref("network.http.spdy.enabled.deps", false); + // user_pref("network.http.spdy.enabled.http2", false); + // user_pref("network.http.spdy.websockets", false); // [FF65+] +/* 7010: disable HTTP Alternative Services [FF37+] + * [WHY] Already isolated by network partitioning (FF85+) or FPI ***/ +user_pref("network.http.altsvc.enabled", false); +user_pref("network.http.altsvc.oe", false); +/* 7011: disable website control over browser right-click context menu + * [WHY] Just use Shift-Right-Click ***/ +user_pref("dom.event.contextmenu.enabled", false); +/* 7012: disable icon fonts (glyphs) and local fallback rendering + * [WHY] Breakage, font fallback is equivalency, also RFP + * [1] https://bugzilla.mozilla.org/789788 + * [2] https://gitlab.torproject.org/legacy/trac/-/issues/8455 ***/ +user_pref("gfx.downloadable_fonts.enabled", false); // [FF41+] +user_pref("gfx.downloadable_fonts.fallback_delay", -1); +/* 7013: disable Clipboard API + * [WHY] Fingerprintable. Breakage. Cut/copy/paste require user + * interaction, and paste is limited to focused editable fields ***/ +user_pref("dom.event.clipboardevents.enabled", false); +/* 7014: disable System Add-on updates + * [WHY] It can compromise security. System addons ship with prefs, use those ***/ + // user_pref("extensions.systemAddon.update.enabled", false); // [FF62+] + // user_pref("extensions.systemAddon.update.url", ""); // [FF44+] + +/*** [SECTION 8000]: DON'T BOTHER: NON-RFP + [WHY] They are insufficient to help anti-fingerprinting and do more harm than good + [WARNING] DO NOT USE with RFP. RFP already covers these and they can interfere +***/ +user_pref("_user.js.parrot", "8000 syntax error: the parrot's crossed the Jordan"); +/* 8001: disable APIs ***/ // user_pref("device.sensors.enabled", false); -// 4606: [2501] disable gamepad API - USB device ID enumeration - // Optional protection depending on your connected devices - // [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/13023 + // user_pref("dom.enable_performance", false); + // user_pref("dom.enable_resource_timing", false); // user_pref("dom.gamepad.enabled", false); -// 4607: [2503] disable giving away network info [FF31+] - // e.g. bluetooth, cellular, ethernet, wifi, wimax, other, mixed, unknown, none - // [1] https://developer.mozilla.org/docs/Web/API/Network_Information_API - // [2] https://wicg.github.io/netinfo/ - // [3] https://bugzilla.mozilla.org/960426 -user_pref("dom.netinfo.enabled", false); // [DEFAULT: true on Android] -// 4608: [2021] disable the SpeechSynthesis (Text-to-Speech) part of the Web Speech API - // [1] https://developer.mozilla.org/docs/Web/API/Web_Speech_API - // [2] https://developer.mozilla.org/docs/Web/API/SpeechSynthesis - // [3] https://wiki.mozilla.org/HTML5_Speech_API -user_pref("media.webspeech.synth.enabled", false); -// * * * / -// FF57+ -// 4610: [2506] disable video statistics - JS performance fingerprinting [FF25+] - // [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/15757 - // [2] https://bugzilla.mozilla.org/654550 -user_pref("media.video_stats.enabled", false); -// 4611: [2509] disable touch events - // fingerprinting attack vector - leaks screen res & actual screen coordinates - // 0=disabled, 1=enabled, 2=autodetect - // Optional protection depending on your device - // [1] https://developer.mozilla.org/docs/Web/API/Touch_events - // [2] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/10286 + // user_pref("dom.netinfo.enabled", false); + // user_pref("dom.webaudio.enabled", false); +/* 8002: disable other ***/ + // user_pref("browser.display.use_document_fonts", 0); // user_pref("dom.w3c_touch_events.enabled", 0); -// * * * / -// FF59+ -// 4612: [2511] disable MediaDevices change detection [FF51+] - // [1] https://developer.mozilla.org/docs/Web/Events/devicechange - // [2] https://developer.mozilla.org/docs/Web/API/MediaDevices/ondevicechange -user_pref("media.ondevicechange.enabled", false); -// * * * / -// FF60+ -// 4613: [2011] disable WebGL debug info being available to websites - // [1] https://bugzilla.mozilla.org/1171228 - // [2] https://developer.mozilla.org/docs/Web/API/WEBGL_debug_renderer_info -user_pref("webgl.enable-debug-renderer-info", false); -// * * * / -// FF65+ -// 4614: [2516] disable PointerEvents - // [1] https://developer.mozilla.org/en-US/docs/Web/API/PointerEvent -user_pref("dom.w3c_pointer_events.enabled", false); -// * * * / -// FF67+ -// 4615: [2618] disable exposure of system colors to CSS or canvas [FF44+] - // [NOTE] See second listed bug: may cause black on black for elements with undefined colors - // [SETUP-CHROME] Might affect CSS in themes and extensions - // [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=232227,133087 -user_pref("ui.use_standins_for_native_colors", true); -// 4616: enforce prefers-color-scheme as light [FF67+] - // 0=light, 1=dark : This overrides your OS value -user_pref("ui.systemUsesDarkTheme", 0); // [HIDDEN PREF] -// 4617: enforce prefers-reduced-motion as no-preference [FF63+] [RESTART] - // 0=no-preference, 1=reduce -user_pref("ui.prefersReducedMotion", 0); // [HIDDEN PREF] -// * * * / -// FF41+ -// 4620: mitigate fingerprinting via canvas - // [NOTE] This setting has been removed from gHacks v67 (see [1]) but is still enabled by default. - // [1] https://github.com/arkenfox/user.js/commit/8b07fd57d0f8a31dab25661d51235fe1b0c6360c -user_pref("canvas.capturestream.enabled", false); -// * * * / -// ***/ - -/*** [SECTION 4700]: RFP ALTERNATIVES (NAVIGATOR / USER AGENT (UA) SPOOFING) - This is FYI ONLY. These prefs are INSUFFICIENT(a) on their own, you need - to use RFP (4500) or an extension, in which case they become POINTLESS. - (a) Many of the components that make up your UA can be derived by other means. - And when those values differ, you provide more bits and raise entropy. - Examples of leaks include workers, navigator objects, date locale/formats, - iframes, headers, tcp/ip attributes, feature detection, and **many** more. - ALL values below intentionally left blank - use RFP, or get a vetted, tested - extension and mimic RFP values to *lower* entropy, or randomize to *raise* it -***/ -user_pref("_user.js.parrot", "4700 syntax error: the parrot's taken 'is last bow"); -/* 4701: navigator.userAgent ***/ - // user_pref("general.useragent.override", ""); // [HIDDEN PREF] -/* 4702: navigator.buildID - * Revealed build time down to the second. In FF64+ it now returns a fixed timestamp - * [1] https://bugzilla.mozilla.org/583181 - * [2] https://www.fxsitecompat.com/en-CA/docs/2018/navigator-buildid-now-returns-a-fixed-timestamp/ ***/ - // user_pref("general.buildID.override", ""); // [HIDDEN PREF] -/* 4703: navigator.appName ***/ + // user_pref("media.navigator.enabled", false); + // user_pref("media.ondevicechange.enabled", false); + // user_pref("media.video_stats.enabled", false); + // user_pref("media.webspeech.synth.enabled", false); + // user_pref("webgl.enable-debug-renderer-info", false); +/* 8003: spoof ***/ + // user_pref("dom.maxHardwareConcurrency", 2); + // user_pref("font.system.whitelist", ""); // [HIDDEN PREF] // user_pref("general.appname.override", ""); // [HIDDEN PREF] -/* 4704: navigator.appVersion ***/ // user_pref("general.appversion.override", ""); // [HIDDEN PREF] -/* 4705: navigator.platform ***/ - // user_pref("general.platform.override", ""); // [HIDDEN PREF] -/* 4706: navigator.oscpu ***/ + // user_pref("general.buildID.override", ""); // [HIDDEN PREF] // user_pref("general.oscpu.override", ""); // [HIDDEN PREF] -/* 4707: Limit user-agent data by imitating Firefox's user-agent */ - // user_pref("general.useragent.compatMode.firefox", true); + // user_pref("general.platform.override", ""); // [HIDDEN PREF] + // user_pref("general.useragent.override", ""); // [HIDDEN PREF] + // user_pref("ui.use_standins_for_native_colors", true); -/*** [SECTION 5000]: PERSONAL - Non-project related but useful. If any of these interest you, add them to your overrides ***/ -user_pref("_user.js.parrot", "5000 syntax error: this is an ex-parrot!"); -/* WELCOME & WHAT's NEW NOTICES ***/ - //user_pref("mailnews.start_page_override.mstone", "ignore"); // master switch +/*** [SECTION 9000]: PERSONAL + Non-project related but useful. If any interest you, add them to your overrides +***/ +user_pref("_user.js.parrot", "9000 syntax error: the parrot's cashed in 'is chips!"); +/* WELCOME & WHAT'S NEW NOTICES ***/ +user_pref("mailnews.start_page_override.mstone", "ignore"); // master switch /* WARNINGS ***/ // user_pref("full-screen-api.warning.delay", 0); // user_pref("full-screen-api.warning.timeout", 0); /* APPEARANCE ***/ + // user_pref("ui.systemUsesDarkTheme", 1); // [FF67+] [HIDDEN PREF] + // 0=light, 1=dark: with RFP this only affects chrome // user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true); // [FF68+] allow userChrome/userContent + // user_pref("ui.prefersReducedMotion", 1); // disable chrome animations [FF77+] [RESTART] [HIDDEN PREF] + // 0=no-preference, 1=reduce: with RFP this only affects chrome /* CONTENT BEHAVIOR ***/ // user_pref("accessibility.typeaheadfind", true); // enable "Find As You Type" // user_pref("clipboard.autocopy", false); // disable autocopy default [LINUX] -/* RETURN RECEIPT BEHAVIOR ***/ - // user_pref("mail.mdn.report.enabled", false); // disable return receipt sending unconditionally /* UX BEHAVIOR ***/ // user_pref("general.autoScroll", false); // middle-click enabling auto-scrolling [DEFAULT: false on Linux] // user_pref("ui.key.menuAccessKey", 0); // disable alt key toggling the menu bar [RESTART] +/* UX FEATURES ***/ + // user_pref("reader.parse-on-load.enabled", false); // Reader View /* OTHER ***/ + // user_pref("browser.bookmarks.max_backups", 2); // user_pref("network.manage-offline-status", false); // see bugzilla 620472 // user_pref("xpinstall.signatures.required", false); // enforced extension signing (Nightly/ESR) -/* Set custom headers ***/ +/* RETURN RECEIPT BEHAVIOR ***/ + // user_pref("mail.mdn.report.enabled", false); // disable return receipt sending unconditionally +/* CUSTOM HEADERS ***/ // user_pref("mail.identity.id1.headers", "References, InReplyTo"); // user_pref("mail.identity.id1.header.References", "References: <2ad46d80-c8ce-49a3-9896-16171788ac28@example.tld>\n <31ff00c2-b7cb-4063-beeb-a0bdd424c3a7@example1.tld>"); // user_pref("mail.identity.id1.header.InReplyTo", "In-Reply-To: <31ff00c2-b7cb-4063-beeb-a0bdd424c3a7@example1.tld>"); @@ -1431,16 +1315,16 @@ user_pref("mail.identity.id1.headers", ""); user_pref("mail.identity.id1.header.References", ""); user_pref("mail.identity.id1.header.InReplyTo", ""); -/*** [SECTION 6000]: THUNDERBIRD (AUTO CONFIG / UI / HEADERS / ADDRESS BOOK) +/*** [SECTION 9100]: THUNDERBIRD (AUTO CONFIG / UI / HEADERS / ADDRESS BOOK) Options general to Thunderbird's mail configuration and user interface - [1] https://searchfox.org/comm-esr78/source/ + [1] https://searchfox.org/comm-esr91/source/ [2] http://kb.mozillazine.org/Mail_and_news_settings ***/ -user_pref("_user.js.parrot", "6000 syntax error: this parrot is blind!"); +user_pref("_user.js.parrot", "9100 syntax error: this parrot is blind!"); /** AUTO CONFIG ***/ -/* 6001: Disable auto-configuration [SETUP-INSTALL] +/* 9101: Disable auto-configuration [SETUP-INSTALL] * These options disable auto-configuration of mail servers in Thunderbird. * Such settings require a query to Mozilla which could have privacy implications * if the user wishes to keep the existence of the mail provider private. @@ -1451,53 +1335,44 @@ user_pref("mailnews.auto_config.fetchFromISP.sendEmailAddress", false); user_pref("mailnews.auto_config.fetchFromExchange.enabled", false); user_pref("mailnews.auto_config_url", ""); user_pref("mailnews.auto_config.addons_url",""); -/* 6002: Disable account provisioning [SETUP-INSTALL] +/* 9102: Disable account provisioning [SETUP-INSTALL] * This option allows users to create a new email account through partner providers. * [1] https://developer.mozilla.org/en-US/docs/Mozilla/Thunderbird/Account_Provisioner ***/ user_pref("mail.provider.enabled", false); /** UI (User Interface) ***/ -/* 6010: Hide tab bar +/* 9110: Hide tab bar * false=Hides the tab bar if there is only one tab. (default) ***/ user_pref("mail.tabs.autoHide", true); -/* 6011: Show full email instead of just name from address book +/* 9111: Show full email instead of just name from address book * true=Show just the display name for people in the address book (default) * false=Show both the email address and display name. ***/ user_pref("mail.showCondensedAddresses", false); -/* 6012: Disable "Filelink for Large Attachments" feature +/* 9112: Disable "Filelink for Large Attachments" feature * [1] https://support.thunderbird.net/kb/filelink-large-attachments ***/ user_pref("mail.cloud_files.enabled", false); -user_pref("mail.cloud_files.inserted_urls.footer.link", ""); -/* 6013: Don't hide cookies and passwords related (advanced?) buttons ***/ +/* 9113: Don't hide cookies and passwords related (advanced?) buttons ***/ user_pref("pref.privacy.disable_button.view_cookies", false); user_pref("pref.privacy.disable_button.cookie_exceptions", false); user_pref("pref.privacy.disable_button.view_passwords", false); -/* 6014: Prevent access to emails until the master password is entered - * If a master password has been set, Thunderbird will prevent access to locally available emails - * until the secret is provided. - * This preference MAY mitigate risk due to intimate relationship threat in some cases (see [2])... - * [WARNING] This DOES NOT encrypt locally cached emails anyhow (poor man's application security) - * [1] https://support.mozilla.org/en-US/kb/protect-your-thunderbird-passwords-master-password - * [2] https://www.schneier.com/wp-content/uploads/2020/06/Privacy_Threats_in_Intimate_Relationships-1.pdf ***/ -user_pref("mail.password_protect_local_cache", true); // [HIDDEN PREF] /** HEADERS ***/ -/* 6020: +/* 9120: * true=Show Sender header in message pane. * false=Does nothing. (default) ***/ user_pref("mailnews.headers.showSender", true); -/* 6021: +/* 9121: * true=Show User Agent header in message pane * false=Does nothing. (default) ***/ user_pref("mailnews.headers.showUserAgent", false); -/* 6022: Hello argument +/* 9122: Hello argument * Lets you replace your IP address with the specified string in Received: headers when your * IP address is not a "fully qualified domain name" (FQDN). Typically you only need to do this * when you have a NAT box to prevent it from using the NAT boxes IP address. * If you don't set it to something in your SMTP server's domain it may increase your spam * score. ***/ user_pref("mail.smtpserver.default.hello_argument", "[127.0.0.1]"); -/* 6023: Displayed dates and times +/* 9123: Displayed dates and times * [SETUP-INSTALL] When your e-mail program displays the e-mail's date and time, it normally * converts them to your time zone. If your computer's time zone settings are wrong, then you will * see the wrong time (and possibly the wrong date). @@ -1508,9 +1383,9 @@ user_pref("mail.smtpserver.default.hello_argument", "[127.0.0.1]"); * [2] http://wiki.cacert.org/ThunderBirdAdvancedConfig * ***/ user_pref("mailnews.display.original_date", false); -/* 6024: Display the sender's Timezone when set to true ***/ +/* 9124: Display the sender's Timezone when set to true ***/ user_pref("mailnews.display.date_senders_timezone", false); -/* 6025: Display Time Date based on Received Header +/* 9125: Display Time Date based on Received Header * Thunderbird shows the time when the message was sent, according to the sender. It is possible * to make Thunderbird show the time when the message arrived on your mail server, based on the * "Received" header. Set the following preference. New messages will show the time the message @@ -1518,40 +1393,38 @@ user_pref("mailnews.display.date_senders_timezone", false); // user_pref("mailnews.use_received_date", true); /** ADDRESS BOOK ***/ -/* 6030: Address book collection [SETUP-FEATURE] +/* 9130: Address book collection [SETUP-FEATURE] * Disable Thunderbird internal address book email collection * Consider using CardBook extension instead (https://addons.thunderbird.net/addon/cardbook/) - * [SETTING] Preferences>Composition>Addressing>Automatically add outgoing e-mail addresses... - * [SETTING][CARDBOOK] CardBook>Preferences>Email>Collect Outgoing Email ***/ + * [SETTING] Preferences > Composition > Addressing > Automatically add outgoing e-mail addresses... + * [SETTING][CARDBOOK] CardBook > Preferences > Email > Collect Outgoing Email ***/ // user_pref("mail.collect_addressbook", "jsaddrbook://history.sqlite"); user_pref("mail.collect_email_address_outgoing", false); -/* 6031: Only use email addresses, without their Display Names [CARDBOOK] [SETUP-FEATURE] +/* 9131: Only use email addresses, without their Display Names [CARDBOOK] [SETUP-FEATURE] * By default, CardBook extension incorporates contacts display names in addresses fields. * This could leak sensitive information to all recipients. - * [SETTING][CARDBOOK] CardBook>Preferences>Email>Sending Emails>Only use email addresses... ***/ + * [SETTING][CARDBOOK] CardBook > Preferences > Email > Sending Emails > Only use email addresses... ***/ user_pref("extensions.cardbook.useOnlyEmail", true); -/*** [SECTION 6100]: EMAIL COMPOSITION (ENCODING / FORMAT / VIEW) +/*** [SECTION 9200]: EMAIL COMPOSITION (ENCODING / FORMAT / VIEW) Options that relate to composition, formatting and viewing email ***/ -user_pref("_user.js.parrot", "6100 syntax error: this parrot has got no mail!"); +user_pref("_user.js.parrot", "9200 syntax error: this parrot has got no mail!"); /** ENCODING ***/ -/* 6101: Prevent fallback encoding to windows-1252, prefer 7bit or 8bit UTF-8 +/* 9201: Prevent fallback encoding to windows-1252, prefer 7bit or 8bit UTF-8 * [1] http://forums.mozillazine.org/viewtopic.php?f=28&t=267341 * [2] https://bugzilla.mozilla.org/show_bug.cgi?id=214729 * [3] https://stackoverflow.com/a/28531705 ***/ user_pref("intl.fallbackCharsetList.ISO-8859-1", "UTF-8"); -/* 6102: Set encoding of incoming mail - * [SETTING] Display > Advanced > Fonts & Encodings > Incoming Mail ***/ +/* 9202: Set encoding of incoming mail ***/ user_pref("mailnews.view_default_charset", "UTF-8"); -/* 6103: Set encoding of outgoing mail - * [SETTING] Display > Advanced > Fonts & Encodings > Outgoing Mail ***/ +/* 9203: Set encoding of outgoing mail ***/ user_pref("mailnews.send_default_charset", "UTF-8"); -/* 6104: Forces encoding in reply to be the default charset +/* 9204: Forces encoding in reply to be the default charset * [1] https://bugzilla.mozilla.org/show_bug.cgi?id=234958#c2 ***/ user_pref("mailnews.reply_in_default_charset", true); -/* 6105: Avoid information leakage in reply header +/* 9205: Avoid information leakage in reply header * Reply header may contain sensitive information about system locale (date and/or language) * 0=no header * 1=" wrote:" (see `reply_header_authorwrotesingle` below) @@ -1564,17 +1437,17 @@ user_pref("mailnews.reply_header_authorwrotesingle", "#1 wrote:"); // user_pref("mailnews.reply_header_authorwroteondate", "#1 wrote on #2 #3:"); /** COMPOSITION ***/ -/* 6110: Check spelling before sending [SETUP-FEATURE] +/* 9210: Check spelling before sending [SETUP-FEATURE] * [1] https://bugzilla.mozilla.org/show_bug.cgi?id=667133 ***/ user_pref("mail.SpellCheckBeforeSend", false); -/* 6111: Behavior when sending HTML message [SETUP-FEATURE] +/* 9211: Behavior when sending HTML message [SETUP-FEATURE] * (0=Ask, 1=Send as plain text, 2=Send as HTML anyway, * 3=Include both plain text and HTML message bodies in message) * Email that is HTML should also have plaintext multipart for plain text users. * [1] https://drewdevault.com/2016/04/11/Please-use-text-plain-for-emails.html - * [SETTING] Edit > Preferences > Send Options > Send the message in both plain text and HTML ***/ + * [SETTING] Account Settings > Composition & Addressing > Composition > Compose messages in HTML format ***/ user_pref("mail.default_html_action", 1); -/* 6112: Send email in plaintext unless expressly overridden. +/* 9212: Send email in plaintext unless expressly overridden. * [SETUP-FEATURE] Sometimes HTML is useful especially when used with Markdown Here * [NOTE] Holding down shift when you click on "Write" will bypass * [1] http://kb.mozillazine.org/Plain_text_e-mail_%28Thunderbird%29 @@ -1582,18 +1455,18 @@ user_pref("mail.default_html_action", 1); * [3] https://markdown-here.com ***/ user_pref("mail.html_compose", false); user_pref("mail.identity.default.compose_html", false); -/* 6113: Downgrade email to plaintext by default +/* 9213: Downgrade email to plaintext by default * [SETUP-FEATURE] Only use HTML email if you need it, see above - * [SETTING] Edit > Preferences > Composition > Send Options > Send messages as plain-text if possible ***/ -user_pref("mailnews.sendformat.auto_downgrade", false); -/* 6114: What classes can process incoming data. + * [SETTING] Composition > Composition > HTML Style > Configure text format behavior > Send options... > Send messages as plain text if possible ***/ +user_pref("mailnews.sendformat.auto_downgrade", true); +/* 9214: What classes can process incoming data. * (0=All classes (default), 1=Don't display HTML, 2=Don't display HTML and inline images, * 3=Don't display HTML, inline images and some other uncommon types, 100=Use a hard coded list) * In the past this has mitigated a vulnerability CVE-2008-0304 (rare) * [1] https://www.mozilla.org/en-US/security/advisories/mfsa2008-12/ * [2] https://bugzilla.mozilla.org/show_bug.cgi?id=677905 ***/ user_pref("mailnews.display.disallow_mime_handlers", 3); -/* 6115: How to display HTML parts of a message body +/* 9215: How to display HTML parts of a message body * (0=Display the HTML normally (default), 1=Convert it to text and then back again * 2=Display the HTML source, 3=Sanitize the HTML, 4=Display all body parts) * (in trunk builds later than 2011-07-23) @@ -1601,67 +1474,82 @@ user_pref("mailnews.display.disallow_mime_handlers", 3); * [2] https://hg.mozilla.org/comm-central/rev/c1ef44a22eb2 * [3] https://www.bucksch.org/1/projects/mozilla/108153/ ***/ user_pref("mailnews.display.html_as", 3); -/* 6116: Prefer to view as plaintext or html [SETUP-FEATURE] +/* 9216: Prefer to view as plaintext or html [SETUP-FEATURE] * true=Display a message as plain text when there is both a HTML and a plain * text version of a message body * false=Display a message as HTML when there is both a HTML and a plain text * version of a message body. (default) ***/ user_pref("mailnews.display.prefer_plaintext", false); -/* 6117: Inline attachments [SETUP-FEATURE] +/* 9217: Inline attachments [SETUP-FEATURE] * true=Show inlinable attachments (text, images, messages) after the message. * false=Do not display any attachments with the message ***/ user_pref("mail.inline_attachments", false); -/* 6118: Big attachment warning +/* 9218: Big attachment warning * [1] https://support.mozilla.org/en-US/questions/1081046 * [2] http://forums.mozillazine.org/viewtopic.php?f=39&t=2949521 */ user_pref("mail.compose.big_attachments.notify", true); // [DEFAULT: true] -/* 6119: Set big attachment size to warn at */ +/* 9219: Set big attachment size to warn at */ +user_pref("mail.compose.big_attachments.threshold_kb", 9220); // [DEFAULT: 5120] // user_pref("mailnews.message_warning_size", 20971520); // [DEFAULT: 20971520] /** VIEW ***/ -/* 6130: Disable JavaScript +/* 9230: Disable JavaScript * [NOTE] JavaScript is already disabled in message content. * [1] https://developer.mozilla.org/en-US/docs/Mozilla/Thunderbird/Releases/3 * [2] https://stackoverflow.com/questions/3054315/is-javascript-supported-in-an-email-message * ***/ user_pref("javascript.enabled", false); -/* 6131: Disable media source extensions +/* 9231: Disable media source extensions * [1] https://www.ghacks.net/2014/05/10/enable-media-source-extensions-firefox ***/ user_pref("media.mediasource.enabled", false); -/* 6132: Disable hardware decoding support ***/ +/* 9232: Disable hardware decoding support ***/ user_pref("media.hardware-video-decoding.enabled", false); -/* 6133: Default image permissions +/* 9233: Default image permissions * 1=Allow all images to load, regardless of origin. (Default), * 2=Block all images from loading. * 3=Prevent third-party images from loading * [1] http://kb.mozillazine.org/Permissions.default.image ***/ user_pref("permissions.default.image", 2); +/* 9240: Builtin phishing/scamming detection + * [NOTE] These preferences are enabled by default and should not usually be touched. + * [1] https://searchfox.org/comm-central/source/mail/modules/PhishingDetector.jsm ***/ +user_pref("mail.phishing.detection.enabled", true); +user_pref("mail.phishing.detection.disallow_form_actions", true); +user_pref("mail.phishing.detection.ipaddresses", true); +user_pref("mail.phishing.detection.mismatched_hosts", true); -/*** [SECTION 6200]: OTHER THUNDERBIRD COMPONENTS (CHAT / CALENDAR / RSS) +/*** [SECTION 9300]: OTHER THUNDERBIRD COMPONENTS (CHAT / CALENDAR / RSS) Options that relate to other Thunderbird components such as the chat client, calendar and RSS) ***/ -user_pref("_user.js.parrot", "6200 syntax error: this parrot is not tweeting!"); +user_pref("_user.js.parrot", "9300 syntax error: this parrot is not tweeting!"); /** CHAT ***/ -/* 6201: Disable chat functionality [SETUP-FEATURE] ***/ +/* 9301: Disable chat functionality [SETUP-FEATURE] ***/ user_pref("mail.chat.enabled", false); -/* 6202: Disable logging of group chats ***/ +/* 9302: Disable logging of group chats ***/ user_pref("purple.logging.log_chats", false); -/* 6203: Disable logging of 1 to 1 conversations ***/ +/* 9303: Disable logging of 1 to 1 conversations ***/ user_pref("purple.logging.log_ims", false); -/* 6204: Disable logging of system messages ***/ +/* 9304: Disable logging of system messages ***/ user_pref("purple.logging.log_system", false); -/* 6205: Disable typing notifications ***/ +/* 9305: Disable typing notifications ***/ user_pref("purple.conversations.im.send_typing", false); -/* 6206: When chat is enabled, do not connect to accounts automatically +/* 9306: When chat is enabled, do not connect to accounts automatically * 0=Do not connect / show the account manager, * 1=Connect automatically. (Default) ***/ // user_pref("messenger.startup.action", 0); -/* 6207: When chat is enabled, do not report idle status ***/ +/* 9307: When chat is enabled, do not report idle status ***/ // user_pref("messenger.status.reportIdle", false); +/* 9308: Disable chat desktop notifications ***/ + // user_pref("mail.chat.show_desktop_notifications", false); +/* 9309: Decide how much information will be shown in chat notifications + * 0=Show all info (sender, chat message message preview), + * 1=Show sender's info only (not message preview), + * 2=No info (fill dummy values). ***/ +user_pref("mail.chat.notification_info", 2); /** CALENDAR ***/ -/* 6210: Disable calendar integration +/* 9310: Disable calendar integration * [SETUP-FEATURE] Lightning calendar add-on is integrated in Thunderbird 38 and later. * Keeping this preference false allows us to properly show the opt-in/opt-out dialog * on new profiles fresh start, see [3]. @@ -1669,25 +1557,25 @@ user_pref("purple.conversations.im.send_typing", false); * [2] https://bugzilla.mozilla.org/show_bug.cgi?id=1130854 * [3] https://bugzilla.mozilla.org/show_bug.cgi?id=1130852 ***/ user_pref("mail.calendar-integration.opt-out", false); -/* 6211: Set user agent for calendar ***/ +/* 9311: Set user agent for calendar ***/ user_pref("calendar.useragent.extra", ""); -/* 6212: Set calendar timezone to avoid system detection [SETUP-INSTALL] +/* 9312: Set calendar timezone to avoid system detection [SETUP-INSTALL] * By default, extensive system detection would be performed to find user's current timezone. * Setting this preference to "UTC" should disable it. * You may also directly set it to your timezone, i.e. "Pacific/Fakaofo" - * [SETTING] Edit>Preferences>Calendar>Calendar>Timezone ***/ + * [SETTING] Calendar > Calendar > Timezone ***/ user_pref("calendar.timezone.local", "UTC"); // [DEFAULT: ""] /** RSS ***/ /** These features don't actually do anything as they aren't implemented * [1] https://searchfox.org/comm-esr78/rev/384830b0570096c48770398060f87fbe556f6f01/mail/base/content/mailWindowOverlay.js#925 * [2] https://bugzilla.mozilla.org/show_bug.cgi?id=458606#c9 -/* 6220: What classes can process incoming data. +/* 9320: What classes can process incoming data. * (0=All classes (default), 1=Don't display HTML, 2=Don't display HTML and inline images, * 3=Don't display HTML, inline images and some other uncommon types, 100=Use a hard coded list) * [1] https://www.privacy-handbuch.de/handbuch_31j.htm user_pref("rss.display.disallow_mime_handlers", 3); -/* 6221: How to display HTML parts of a message body +/* 9321: How to display HTML parts of a message body * (0=Display the HTML normally (default), 1=Convert it to text and then back again * 2=Display the HTML source, 3=Sanitize the HTML, 4=Display all body parts) * (in trunk builds later than 2011-07-23) @@ -1695,171 +1583,93 @@ user_pref("rss.display.disallow_mime_handlers", 3); * [2] https://hg.mozilla.org/comm-central/rev/c1ef44a22eb2 * [3] https://www.bucksch.org/1/projects/mozilla/108153/ user_pref("rss.display.html_as", 1); -/* 6222: Prefer to view as plaintext or html +/* 9322: Prefer to view as plaintext or html * true=Display a message as plain text when there is both a HTML and a plain * text version of a message body * false=Display a message as HTML when there is both a HTML and a plain text * version of a message body. (default) user_pref("rss.display.prefer_plaintext", true); **/ -/* 6223: Feed message display (summary or web page), on open. +/* 9323: Feed message display (summary or web page), on open. * Action on double click or enter in threadpane for a feed message. * 0=open content-base url in new window, 1=open summary in new window, * 2=toggle load summary and content-base url in message pane, * 3=load content-base url in browser * [1] http://forums.mozillazine.org/viewtopic.php?f=39&t=2502335 ***/ user_pref("rss.show.content-base", 3); -/* 6224: Feed message display (summary or web page), on select. +/* 9324: Feed message display (summary or web page), on select. * 0=global override, load web page, 1=global override, load summary, * 2=use default feed folder setting from Subscribe dialog; if no setting default to 1 ***/ user_pref("rss.show.summary", 1); -/* 6225: Feed message additional web page display. +/* 9325: Feed message additional web page display. * 0=no action, 1=load web page in default browser, on select ***/ user_pref("rss.message.loadWebPageOnSelect", 0); -/*** [SECTION 6300]: THUNDERBIRD ENCRYPTION (ENIGMAIL / AUTOCRYPT / GNUPG) - Options that relate to Enigmail addon and AutoCrypt. - GnuPG (and RNP) specific options should also land there. - [1] https://autocrypt.org - [2] https://www.enigmail.net/index.php/en/user-manual/advanced-operations - [3] https://wiki.mozilla.org/Thunderbird:OpenPGP +/*** [SECTION 9400]: THUNDERBIRD ENCRYPTION (OPENGPG / GNUPG) + Options that relate to e-mail encryption in Thunderbird. + [1] https://wiki.mozilla.org/Thunderbird:OpenPGP + [2] https://support.mozilla.org/kb/openpgp-thunderbird-howto-and-faq ***/ -user_pref("_user.js.parrot", "6300 syntax error: this parrot is talking in codes!"); - -/** ENIGMAIL ***/ -/* These used to be inversed, however it seems upstream has changed this behavior - * [1] https://www.privacy-handbuch.de/handbuch_31f.htm ***/ -/* 6301: Silence the Enigmail version header ***/ -user_pref("extensions.enigmail.addHeaders", false); // [DEFAULT: false] -/* 6302: Silence the Enigmail comment ***/ -user_pref("extensions.enigmail.useDefaultComment", true); // [DEFAULT: true] -/* 6303: Silence the version ***/ -user_pref("extensions.enigmail.agentAdditionalParam", "--no-emit-version --no-comments"); -/* 6304: Specifies the hash algorithm used by GnuPG for its cryptographic operations: - * 0=automatic selection, let GnuPG choose (default, recommended), 1=SHA1, 2=RIPEMD160 - * 3=SHA256, 4=SHA384, 5=SHA512 - * [NOTE] You should probably have a decent gpg.conf with things set. Examples - * [1] https://github.com/Whonix/anon-gpg-tweaks/blob/master/etc/skel/.gnupg/gpg.conf - * [2] https://github.com/ioerror/torbirdy/blob/master/gpg.conf - * ***/ -user_pref("extensions.enigmail.mimeHashAlgorithm", 5); -/* 6305: Protect subject line - * 0=Leave subject unprotected, - * 1=Show dialog with "Leave subject unprotected" (changes value to 0) - * or "Protect subject" (changes value to 2, - * 2=Protect subject***/ -user_pref("extensions.enigmail.protectedHeaders", 2); -/* 6306: Text to use as replacement for the subject, following the Memory Hole - * standard. If nothing is defined, then "Encrypted Message" is used. - ***/ -user_pref("extensions.enigmail.protectedSubjectText", "Encrypted Message"); // [DEFAULT: "Encrypted Message"] - -/** AUTOCRYPT ***/ -/* 6307: Choose whether to enable AutoCrypt - * [1] https://autocrypt.org/level1.html - * [2] https://redmine.tails.boum.org/code/issues/16186 - * [SETTING] Edit > Account Settings > OpenPGP Security > Autocrypt > Enable Autocrypt ***/ -user_pref("mail.server.default.enableAutocrypt", false); -/* 6308: Prefer email encryption with known contacts - * [SETTING] Edit > Account Settings > OpenPGP Security > Autocrypt > - * Prefer encrypted emails from the people you exchange email with - * [1] https://redmine.tails.boum.org/code/issues/15923 ***/ -user_pref("mail.server.default.acPreferEncrypt", 0); +user_pref("_user.js.parrot", "9400 syntax error: this parrot is talking in codes!"); /** GNUPG ***/ -/* 6309: Allow the use of external GnuPG +/* 9409: Allow the use of external GnuPG * Whenever RNP fails to decrypt a message, Thunderbird will tray against system GnuPG * [1] https://wiki.mozilla.org/Thunderbird:OpenPGP:Smartcards#Allow_the_use_of_external_GnuPG ***/ user_pref("mail.openpgp.allow_external_gnupg", true); // [HIDDEN PREF] /*** [SECTION 9999]: DEPRECATED / REMOVED / LEGACY / RENAMED - Documentation denoted as [-]. Items deprecated in FF68 or earlier have been archived at [1], - which also provides a link-clickable, viewer-friendly version of the deprecated bugzilla tickets - [1] https://github.com/ghacksuserjs/ghacks-user.js/issues/123 + Documentation denoted as [-]. Items deprecated in FF78 or earlier have been archived at [1] + [1] https://github.com/arkenfox/user.js/issues/123 ***/ -user_pref("_user.js.parrot", "9999 syntax error: the parrot's deprecated!"); -/* ESR68.x still uses all the following prefs +user_pref("_user.js.parrot", "9999 syntax error: the parrot's shuffled off 'is mortal coil!"); +/* ESR78.x still uses all the following prefs // [NOTE] replace the * with a slash in the line above to re-enable them -// FF69 -// 1405: disable WOFF2 (Web Open Font Format) [FF35+] - // [-] https://bugzilla.mozilla.org/1556991 - // user_pref("gfx.downloadable_fonts.woff2.enabled", false); -// 1802: enforce click-to-play for plugins - // [-] https://bugzilla.mozilla.org/1519434 -user_pref("plugins.click_to_play", true); // [DEFAULT: true FF25+] -// 2033: disable autoplay for muted videos [FF63+] - replaced by 'media.autoplay.default' options (2030) - // [-] https://bugzilla.mozilla.org/1562331 - // user_pref("media.autoplay.allow-muted", false); -// * * * / -// FF71 -// 2608: disable WebIDE and ADB extension download - // [1] https://trac.torproject.org/projects/tor/ticket/16222 - // [-] https://bugzilla.mozilla.org/1539462 -user_pref("devtools.webide.enabled", false); // [DEFAULT: false FF70+] -user_pref("devtools.webide.autoinstallADBExtension", false); // [FF64+] -// 2731: enforce websites to ask to store data for offline use - // [1] https://support.mozilla.org/questions/1098540 - // [2] https://bugzilla.mozilla.org/959985 - // [-] https://bugzilla.mozilla.org/1574480 -user_pref("offline-apps.allow_by_default", false); -// * * * / -// FF72 -// 0105a: disable Activity Stream telemetry - // [-] https://bugzilla.mozilla.org/1597697 -user_pref("browser.newtabpage.activity-stream.telemetry.ping.endpoint", ""); -// 0330: disable Hybdrid Content telemetry - // [-] https://bugzilla.mozilla.org/1520491 -user_pref("toolkit.telemetry.hybridContent.enabled", false); // [FF59+] -// 2720: enforce IndexedDB (IDB) as enabled - // IDB is required for extensions and Firefox internals (even before FF63 in [1]) - // To control *website* IDB data, control allowing cookies and service workers, or use - // Temporary Containers. To mitigate *website* IDB, FPI helps (4001), and/or sanitize - // on close (Offline Website Data, see 2800) or on-demand (Ctrl-Shift-Del), or automatically - // via an extension. Note that IDB currently cannot be sanitized by host. - // [1] https://blog.mozilla.org/addons/2018/08/03/new-backend-for-storage-local-api/ - // [-] https://bugzilla.mozilla.org/1488583 -user_pref("dom.indexedDB.enabled", true); // [DEFAULT: true] -// * * * / -// FF74 -// 0203: use Mozilla geolocation service instead of Google when geolocation is enabled - // Optionally enable logging to the console (defaults to false) - // [-] https://bugzilla.mozilla.org/1613627 -user_pref("geo.wifi.uri", "https://location.services.mozilla.com/v1/geolocate?key=%MOZILLA_API_KEY%"); - // user_pref("geo.wifi.logging.enabled", true); // [HIDDEN PREF] -// 1704: set behaviour on "+ Tab" button to display container menu [FF53+] [SETUP-CHROME] - // 0=no menu (default), 1=show when clicked, 2=show on long press - // [1] https://bugzilla.mozilla.org/1328756 - // [-] https://bugzilla.mozilla.org/1606265 -user_pref("privacy.userContext.longPressBehavior", 2); -// 2012: limit WebGL - // [-] https://bugzilla.mozilla.org/1477756 -user_pref("webgl.disable-extensions", true); -// * * * / -// FF76 -// 0401: sanitize blocklist url - // [2] https://trac.torproject.org/projects/tor/ticket/16931 - // [-] https://bugzilla.mozilla.org/1618188 -user_pref("extensions.blocklist.url", "https://blocklists.settings.services.mozilla.com/v1/blocklist/3/%APP_ID%/%APP_VERSION%/"); -// * * * / -// FF77 -// 0850e: disable location bar one-off searches [FF51+] - // [1] https://www.ghacks.net/2016/08/09/firefox-one-off-searches-address-bar/ - // [-] https://bugzilla.mozilla.org/1628926 - // user_pref("browser.urlbar.oneOffSearches", false); -// 2605: block web content in file processes [FF55+] - // [SETUP-WEB] You may want to disable this for corporate or developer environments - // [1] https://bugzilla.mozilla.org/1343184 - // [-] https://bugzilla.mozilla.org/1603007 -user_pref("browser.tabs.remote.allowLinkedWebInFileUriProcess", false); -// * * * / -// FF78 -// 2031: disable autoplay of HTML5 media if you interacted with the site [FF66+] - replaced by 'media.autoplay.blocking_policy' - // [-] https://bugzilla.mozilla.org/1509933 -user_pref("media.autoplay.enabled.user-gestures-needed", false); -// 5000's: disable chrome animations - replaced FF77+ by 'ui.prefersReducedMotion' (4520) - // [-] https://bugzilla.mozilla.org/1640501 - // user_pref("toolkit.cosmeticAnimations.enabled", false); // [FF55+] -// * * * / +// FF79 +// 0212: enforce fallback text encoding to match en-US + // When the content or server doesn't declare a charset the browser will + // fallback to the "Current locale" based on your application language + // [TEST] https://hsivonen.com/test/moz/check-charset.htm + // [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/20025 + // [-] https://bugzilla.mozilla.org/1603712 +user_pref("intl.charset.fallback.override", "windows-1252"); +// FF82 +// 0206: disable geographically specific results/search engines e.g. "browser.search.*.US" + // i.e. ignore all of Mozilla's various search engines in multiple locales + // [-] https://bugzilla.mozilla.org/1619926 +user_pref("browser.search.geoSpecificDefaults", false); +user_pref("browser.search.geoSpecificDefaults.url", ""); +// FF86 +// 1205: disable SSL Error Reporting + // [1] https://firefox-source-docs.mozilla.org/main/65.0/browser/base/sslerrorreport/preferences.html + // [-] https://bugzilla.mozilla.org/1681839 +user_pref("security.ssl.errorReporting.automatic", false); +user_pref("security.ssl.errorReporting.enabled", false); +user_pref("security.ssl.errorReporting.url", ""); +// 2653: disable hiding mime types (Options>General>Applications) not associated with a plugin + // [-] https://bugzilla.mozilla.org/1581678 +user_pref("browser.download.hide_plugins_without_extensions", false); +// FF89 +// 0309: disable sending Flash crash reports + // [-] https://bugzilla.mozilla.org/1682030 [underlying NPAPI code removed] +user_pref("dom.ipc.plugins.flash.subprocess.crashreporter.enabled", false); +// 0310: disable sending the URL of the website where a plugin crashed + // [-] https://bugzilla.mozilla.org/1682030 [underlying NPAPI code removed] +user_pref("dom.ipc.plugins.reportCrashURL", false); +// 1243: block unencrypted requests from Flash on encrypted pages to mitigate MitM attacks [FF59+] + // [1] https://bugzilla.mozilla.org/1190623 + // [-] https://bugzilla.mozilla.org/1682030 [underlying NPAPI code removed] +user_pref("security.mixed_content.block_object_subrequest", true); +// 1803: disable Flash plugin + // 0=deactivated, 1=ask, 2=enabled + // ESR52.x is the last branch to fully support NPAPI, FF52+ stable only supports Flash + // [NOTE] You can still override individual sites via site permissions + // [-] https://bugzilla.mozilla.org/1682030 [underlying NPAPI code removed] +user_pref("plugin.state.flash", 0); // [DEFAULT: 1] +// FF90 +// 0708: disable FTP [FF60+] + // [-] https://bugzilla.mozilla.org/1574475 + // user_pref("network.ftp.enabled", false); // [DEFAULT: false FF88+] // ***/ /* END: internal custom pref to test for syntax errors ***/