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2422 WASM, add reason for disabling, fixes #1037 (#1054)

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Thorin-Oakenpants 2020-10-26 23:37:49 +13:00 committed by GitHub
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1 changed files with 8 additions and 2 deletions
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@ -1047,8 +1047,14 @@ user_pref("javascript.options.asmjs", false);
// user_pref("javascript.options.ion", false);
// user_pref("javascript.options.baselinejit", false);
// user_pref("javascript.options.jit_trustedprincipals", true); // [FF75+] [HIDDEN PREF]
/* 2422: disable WebAssembly [FF52+] [SETUP-PERF]
* [1] https://developer.mozilla.org/docs/WebAssembly ***/
/* 2422: disable WebAssembly [FF52+]
* Vulnerabilities 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 crytopmining / malvertising [2][3]
* [1] https://developer.mozilla.org/docs/WebAssembly
* [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);
/* 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 ***/