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I did some digging into what exactly snippets are and how it works ...

Snippets = information about mozilla and firefox like tips + tricks and things they want to highlight or advertise, etc. (~4MB of data with CSS, HTML + JS)
If you want to see the data, load [this](https://snippets.cdn.mozilla.net/5/Firefox/63.0/20181018182531/WINNT_x86_64-msvc/en-US/release/Windows_NT%206.1/default/default/) and look at the response.

"Updates from Mozilla and Firefox", as it says in the UI, doesn't sound that bad but it includes [metrics](https://abouthome-snippets-service.readthedocs.io/en/latest/data_collection.html#metrics), geolocation stuff and runs JS code received from a server (AKA remote code execution).

When I saw that it allows RCE I tried to inject code via the URL but "data" URIs don't work anymore because Activity Stream is now protected with a CSP.

Should we add something like `Runs code received from a server (aka Remote Code Execution) and sends information back to a metrics server`? Because "Updates from Mozilla and Firefox" makes it sound kind of tempting and a lot less shitty than it really is, IMHO.

The link we had in 0370 is more intended for mozilla devs and not very useful for end users.
https://abouthome-snippets-service.readthedocs.io/ is better

ps: do we really want all those "has setting" ?
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earthlng 2018-12-11 11:22:30 +00:00 committed by GitHub
parent 778dc89bb6
commit 58e071269f
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1 changed files with 5 additions and 6 deletions
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user.js
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@ -105,13 +105,15 @@ user_pref("browser.newtab.preload", false);
user_pref("browser.newtabpage.activity-stream.feeds.telemetry", false);
user_pref("browser.newtabpage.activity-stream.telemetry", false);
user_pref("browser.newtabpage.activity-stream.telemetry.ping.endpoint", "");
/* 0105b: disable AS Snippets ***/
/* 0105b: disable AS Snippets
* [1] https://abouthome-snippets-service.readthedocs.io/ ***/
user_pref("browser.newtabpage.activity-stream.disableSnippets", true);
user_pref("browser.newtabpage.activity-stream.feeds.snippets", false); // has setting (see 0105)
user_pref("browser.aboutHomeSnippets.updateUrl", "");
/* 0105c: disable AS Top Stories, Pocket-based and/or sponsored content ***/
user_pref("browser.newtabpage.activity-stream.feeds.section.topstories", false);
user_pref("browser.newtabpage.activity-stream.feeds.section.topstories", false); // has setting (see 0105)
user_pref("browser.newtabpage.activity-stream.section.highlights.includePocket", false); // has setting (see 0105)
user_pref("browser.newtabpage.activity-stream.showSponsored", false);
user_pref("browser.newtabpage.activity-stream.showSponsored", false); // has setting (see 0105)
/* 0105d: disable AS recent Highlights in the Library [FF57+] ***/
// user_pref("browser.library.activity-stream.enabled", false);
/* 0110: start Firefox in PB (Private Browsing) mode
@ -234,9 +236,6 @@ user_pref("breakpad.reportURL", "");
user_pref("browser.tabs.crashReporting.sendReport", false); // [FF44+]
user_pref("browser.crashReports.unsubmittedCheck.enabled", false); // [FF51+]
user_pref("browser.crashReports.unsubmittedCheck.autoSubmit2", false); // [FF58+]
/* 0370: disable "Snippets" (Mozilla content shown on about:home screen)
* [1] https://wiki.mozilla.org/Firefox/Projects/Firefox_Start/Snippet_Service ***/
user_pref("browser.aboutHomeSnippets.updateUrl", "data:,");
/* 0380: disable Browser Error Reporter [FF60+]
* [1] https://support.mozilla.org/en-US/kb/firefox-nightly-error-collection
* [2] https://firefox-source-docs.mozilla.org/browser/browser/BrowserErrorReporter.html ***/