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Applies Arkenfox v102.1..v115.1 migration

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Samuel FORESTIER 2023-10-19 22:08:02 +02:00 committed by Samuel FORESTIER
parent 87b0d325e2
commit 088da14f7e
1 changed files with 206 additions and 338 deletions
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user.js
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@ -1,7 +1,7 @@
/******
* name: thunderbird user.js
* date: 30 July 2023
* version: v115.0-beta1
* date: 19 October 2023
* version: v115.0
* url: https://github.com/HorlogeSkynet/thunderbird-user.js
* license: MIT (https://github.com/HorlogeSkynet/thunderbird-user.js/blob/master/LICENSE)
@ -28,9 +28,10 @@
* RELEASES: https://github.com/HorlogeSkynet/thunderbird-user.js/releases
* It is best to use the release that is optimized for and matches your Thunderbird version
* ESR91 users
- If you are not using thunderbird-user.js v91... (not a definitive list)
- 9999: switch the appropriate deprecated section(s) back on
* ESR102
- If you are not using thunderbird-user.js v102-1... (not a definitive list)
- 2815: clearOnShutdown cookies + offlineApps should be false
- 9999: switch the appropriate deprecated section(s) back on
* INDEX:
@ -39,13 +40,13 @@
0300: QUIETER BIRD
0400: SAFE BROWSING
0600: BLOCK IMPLICIT OUTBOUND
0700: DNS / DoH / PROXY / SOCKS / IPv6
0700: DNS / DoH / PROXY / SOCKS
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
1600: REFERERS
1700: CONTAINERS
2000: PLUGINS / MEDIA / WEBRTC
2400: DOM (DOCUMENT OBJECT MODEL)
@ -58,7 +59,7 @@
6000: DON'T TOUCH
7000: DON'T BOTHER
8000: DON'T BOTHER: FINGERPRINTING
9000: PERSONAL
9000: NON-PROJECT RELATED
9100: THUNDERBIRD (AUTO CONFIG / UI / HEADERS / ADDRESS BOOK)
9200: EMAIL COMPOSITION (ENCODING / FORMAT / VIEW)
9300: OTHER THUNDERBIRD COMPONENTS (CHAT / CALENDAR / RSS)
@ -79,14 +80,11 @@ 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] General > System Integration > Always check to see if Thunderbird is the default... ***/
user_pref("mail.shell.checkDefaultClient", false);
/* 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 ***/
* true=? (default), false=blank page ***/
user_pref("browser.newtabpage.enabled", false);
/*** [SECTION 0200]: GEOLOCATION / LANGUAGE / LOCALE ***/
@ -99,13 +97,7 @@ user_pref("geo.provider.network.url", "https://location.services.mozilla.com/v1/
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]
/* 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]
user_pref("geo.provider.use_geoclue", false); // [FF102+] [LINUX]
/* 0210: set preferred language for displaying pages
* [SETTING] General > Language & Appearance > Language > Choose the language used to display...
* [TEST] https://addons.mozilla.org/about ***/
@ -114,7 +106,6 @@ user_pref("intl.accept_languages", "en-US, en");
user_pref("spellchecker.dictionary", "en-US");
/* 0211: use en-US locale regardless of the system or region locale
* [SETUP-WEB] May break some input methods e.g xim/ibus for CJK languages [1]
* [TEST] https://arkenfox.github.io/TZP/tests/formatting.html
* [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=867501,1629630 ***/
user_pref("javascript.use_us_english_locale", true); // [HIDDEN PREF]
@ -230,6 +221,7 @@ user_pref("mail.rights.override", true); // [DEFAULT: unset]
[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
[4] https://educatedguesswork.org/posts/safe-browsing-privacy/
***/
user_pref("_user.js.parrot", "0400 syntax error: the parrot's passed on!");
/* 0401: disable SB (Safe Browsing)
@ -277,20 +269,8 @@ user_pref("network.http.speculative-parallel-limit", 0);
* [1] https://bugzilla.mozilla.org/show_bug.cgi?id=518805 ***/
user_pref("browser.meta_refresh_when_inactive.disabled", true);
/*** [SECTION 0700]: DNS / DoH / PROXY / SOCKS / IPv6 ***/
/*** [SECTION 0700]: DNS / DoH / PROXY / SOCKS ***/
user_pref("_user.js.parrot", "0700 syntax error: the parrot's given up the ghost!");
/* 0701: disable IPv6
* 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://www.internetsociety.org/tag/ipv6-security/ (Myths 2,4,5,6) ***/
user_pref("network.dns.disableIPv6", true);
user_pref("network.notify.IPv6", false);
/* 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
@ -317,10 +297,11 @@ user_pref("network.gio.supported-protocols", ""); // [HIDDEN PREF]
* [WARNING] If false, this will break the fallback for some security features
* [SETUP-CHROME] If you use a proxy and you understand the security impact
* [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1732792,1733994,1733481 ***/
// user_pref("network.proxy.allow_bypass", false); // [HIDDEN PREF FF95-96]
// user_pref("network.proxy.allow_bypass", false);
/* 0710: disable DNS-over-HTTPS (DoH) rollout [FF60+]
* 0=off by default, 2=TRR (Trusted Recursive Resolver) first, 3=TRR only, 5=explicitly off
* 0=default, 2=increased (TRR (Trusted Recursive Resolver) first), 3=max (TRR only), 5=off
* see "doh-rollout.home-region": USA 2019, Canada 2021, Russia/Ukraine 2022 [3]
* [SETTING] General > Network & Disk Space > Connection > Settings... > Enable DNS over HTTPS
* [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://support.mozilla.org/en-US/kb/firefox-dns-over-https
@ -334,14 +315,6 @@ user_pref("network.gio.supported-protocols", ""); // [HIDDEN PREF]
/*** [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
* 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)
* [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]
/* 0802: disable location bar domain guessing
* domain guessing intercepts DNS "hostname not found errors" and resends a
* request (e.g. by adding www or .com). This is inconsistent use (e.g. FQDNs), does not work
@ -360,15 +333,6 @@ user_pref("browser.search.suggest.enabled", false);
* [1] https://blog.mindedsecurity.com/2011/10/autocompleteagain.html
* [2] https://bugzilla.mozilla.org/381681 ***/
user_pref("browser.formfill.enable", 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
@ -401,7 +365,7 @@ user_pref("signon.formlessCapture.enabled", false);
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]
// 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.
@ -426,10 +390,6 @@ user_pref("media.memory_cache_max_size", 65536);
* 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]
/* 1901: disable disk cache for messages not in offline store */
user_pref("mail.imap.use_disk_cache2", false);
@ -448,7 +408,7 @@ user_pref("_user.js.parrot", "1200 syntax error: the parrot's a stiff!");
* 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
* [SETUP-WEB] SSL_ERROR_UNSAFE_NEGOTIATION: is it worth overriding this for that one site?
* [STATS] SSL Labs (July 2021) reports over 99% of top sites have secure renegotiation [4]
* [STATS] SSL Labs (Feb 2023) reports over 99.3% of top sites have secure renegotiation [4]
* [1] https://wiki.mozilla.org/Security:Renegotiation
* [2] https://datatracker.ietf.org/doc/html/rfc5746
* [3] https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3555
@ -471,10 +431,11 @@ user_pref("security.tls.enable_0rtt_data", false);
* 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...
* [SETTING] Privacy & Security > Security > Certificates > Query OCSP responder servers to confirm
* [1] https://en.wikipedia.org/wiki/Ocsp ***/
user_pref("security.OCSP.enabled", 1); // [DEFAULT: 1]
/* 1212: set OCSP fetch failures (non-stapled, see 1211) to hard-fail [SETUP-WEB]
/* 1212: set OCSP fetch failures (non-stapled, see 1211) to hard-fail
* [SETUP-WEB] SEC_ERROR_OCSP_SERVER_ERROR
* When a CA cannot be reached to validate a cert, Thunderbird's just continues the connection (=soft-fail)
* Setting this pref to true tells Thunderbird's to instead terminate the connection (=hard-fail)
* It is pointless to soft-fail when an OCSP fetch fails: you cannot confirm a cert is still valid (it
@ -492,9 +453,8 @@ user_pref("security.OCSP.require", true);
user_pref("security.family_safety.mode", 0);
/* 1223: enable strict PKP (Public Key Pinning)
* 0=disabled, 1=allow user MiTM (default; such as your antivirus), 2=strict
* [SETUP-WEB] MOZILLA_PKIX_ERROR_KEY_PINNING_FAILURE: If you rely on an AV (antivirus) to protect
* your web browsing by inspecting ALL your web traffic, then override to current default
* [NOTE] It needs to be set to 1 when connecting to the ProtonMail Bridge for the first time ***/
* [SETUP-WEB] MOZILLA_PKIX_ERROR_KEY_PINNING_FAILURE
* [SETUP-INSTALL] It needs to be set to 1 when connecting to the ProtonMail Bridge for the first time ***/
user_pref("security.cert_pinning.enforcement_level", 2);
/* 1224: enable CRLite [FF73+]
* 0 = disabled
@ -511,12 +471,12 @@ user_pref("security.pki.crlite_mode", 2);
// user_pref("security.osclientcerts.autoload", true);
/** MIXED CONTENT ***/
/* 1241: disable insecure passive content (such as images) on https pages [SETUP-WEB] ***/
user_pref("security.mixed_content.block_display_content", true);
/* 1241: disable insecure passive content (such as images) on https pages ***/
user_pref("security.mixed_content.block_display_content", true); // Defense-in-depth (see 1244)
/* 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://httpforever.com/ [no upgrade] ***/
* [TEST] http://httpforever.com/ | http://http.rip [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+] ***/
@ -534,10 +494,6 @@ user_pref("dom.security.https_only_mode_send_http_background_request", false);
* [1] https://wiki.mozilla.org/Security:Renegotiation
* [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)
* [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
* only works when it's possible to add an exception
* i.e. it doesn't work for HSTS discrepancies (https://subdomain.preloaded-hsts.badssl.com/)
@ -550,8 +506,6 @@ 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 rendering of SVG OpenType fonts ***/
user_pref("gfx.font_rendering.opentype_svg.enabled", false);
/* 1402: limit font visibility (Windows, Mac, some Linux) [FF94+]
* Uses hardcoded lists with two parts: kBaseFonts + kLangPackFonts [1], bundled fonts are auto-allowed
* In normal windows: uses the first applicable: RFP (4506) over TP over Standard
@ -562,18 +516,13 @@ user_pref("gfx.font_rendering.opentype_svg.enabled", false);
// user_pref("layout.css.font-visibility.standard", 1);
// user_pref("layout.css.font-visibility.trackingprotection", 1);
/*** [SECTION 1600]: HEADERS / REFERERS
/*** [SECTION 1600]: REFERERS
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: control when to send a cross-origin referer
* 0=always (default), 1=only if base domains match, 2=only if hosts match
* [SETUP-WEB] Breakage: older modems/routers and some sites e.g banks, vimeo, icloud, instagram
* If "2" is too strict, then override to "0" and use Smart Referer extension (Strict mode + add exceptions) ***/
user_pref("network.http.referer.XOriginPolicy", 2);
/* 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", 2);
@ -587,15 +536,6 @@ user_pref("privacy.userContext.ui.enabled", true);
/*** [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)
* Thunderbird uses mDNS hostname obfuscation on desktop (except Windows7/8) and the
* private IP is NEVER exposed, except if required in TRUSTED scenarios; i.e. after
* you grant device (microphone or camera) access
* [SETUP-HARDEN] Test first. Windows7/8 users only: behind a proxy who never use WebRTC
* [TEST] https://browserleaks.com/webrtc
* [1] https://groups.google.com/g/discuss-webrtc/c/6stQXi72BEU/m/2FwZd24UAQAJ
* [2] https://datatracker.ietf.org/doc/html/draft-ietf-mmusic-mdns-ice-candidates#section-3.1.1 ***/
user_pref("media.peerconnection.enabled", false);
/* 2002: force WebRTC inside the proxy [FF70+] ***/
user_pref("media.peerconnection.ice.proxy_only_if_behind_proxy", true);
/* 2003: force a single network interface for ICE candidates generation [FF42+]
@ -610,65 +550,26 @@ user_pref("media.peerconnection.ice.no_host", true);
/* 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)
* Optionally hide the setting which also disables the DRM prompt
* [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);
// user_pref("browser.eme.ui.enabled", false);
/* 2030: disable autoplay of HTML5 media [FF63+]
* 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
* Thunderbird'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 2400]: DOM (DOCUMENT OBJECT MODEL) ***/
user_pref("_user.js.parrot", "2400 syntax error: the parrot's kicked the bucket!");
/* 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);
/* 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]
* [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
* [1] https://github.com/pyllyukko/user.js/issues/179#issuecomment-246468676 ***/
user_pref("devtools.chrome.enabled", false);
user_pref("browser.uitour.url", ""); // Defense-in-depth
/* 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]
/* 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);
/* 2616: remove special permissions for certain mozilla domains [FF35+]
* [1] resource://app/defaults/permissions ***/
user_pref("permissions.manager.defaultsUrl", "");
@ -682,25 +583,26 @@ user_pref("webchannel.allowObject.urlWhitelist", "");
* [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);
/* 2620: enforce PDFJS, disable PDFJS scripting [SETUP-CHROME]
/* 2620: enforce PDFJS, disable PDFJS scripting
* 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.
* [WHY] pdfjs is lightweight, open source, and secure: the last exploit was June 2015 [1]
* 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 ***/
* [NOTE] JS can still force a pdf to open in-browser by bundling its own code
* [SETUP-CHROME] You may prefer a different pdf reader for security/workflow reasons
* [SETTING] General > Files & Attachments > Portable Document Format (PDF)
* [1] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=pdf.js+firefox ***/
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);
/* 2624: disable middle click on new tab button opening URLs or searches using clipboard [FF115+] */
user_pref("browser.tabs.searchclipboardfor.middleclick", false); // [DEFAULT: false NON-LINUX]
/** DOWNLOADS ***/
/* 2651: enable user interaction for security by always asking where to download
@ -708,8 +610,7 @@ user_pref("permissions.delegation.enabled", false);
user_pref("browser.download.useDownloadDir", false);
/* 2653: disable adding downloads to the system's "recent documents" list ***/
user_pref("browser.download.manager.addToRecentDocs", false);
/* 2654: enable user interaction for security by always asking how to handle new mimetypes [FF101+]
* [SETTING] General>Files and Applications>What should Thunderbird do with other files ***/
/* 2654: enable user interaction for security by always asking how to handle new mimetypes [FF101+] ***/
user_pref("browser.download.always_ask_before_handling_new_types", true);
/** EXTENSIONS ***/
@ -734,44 +635,45 @@ user_pref("_user.js.parrot", "2700 syntax error: the parrot's joined the bleedin
* [3] https://developer.mozilla.org/en-US/docs/Web/Privacy/State_Partitioning#storage_access_heuristics ***/
// user_pref("privacy.antitracking.enableWebcompat", false);
/* 2710: enable state partitioning of service workers [FF96+] ***/
user_pref("privacy.partition.serviceWorkers", true);
user_pref("privacy.partition.serviceWorkers", true); // [DEFAULT: true FF105+]
/* 2720: enable APS (Always Partitioning Storage) ***/
user_pref("privacy.partition.always_partition_third_party_non_cookie_storage", true); // [FF104+] [DEFAULT: true FF109+]
user_pref("privacy.partition.always_partition_third_party_non_cookie_storage.exempt_sessionstorage", false); // [FF105+] [DEFAULT: false FF109+]
/*** [SECTION 2800]: SHUTDOWN & SANITIZING ***/
user_pref("_user.js.parrot", "2800 syntax error: the parrot's bleedin' demised!");
/** COOKIES + SITE DATA : ALLOWS EXCEPTIONS ***/
/* 2801: delete cookies and site data on exit
* 0=keep until they expire (default), 2=keep until you close Thunderbird
* [NOTE] A "cookie" block permission also controls localStorage/sessionStorage, indexedDB,
* sharedWorkers and serviceWorkers. serviceWorkers require an "Allow" permission
* [SETTING] Privacy & Security>Cookies and Site Data>Delete cookies and site data when Thunderbird is closed
* [SETTING] to add site exceptions: Ctrl+I>Permissions>Cookies>Allow
* [SETTING] to manage site exceptions: Options>Privacy & Security>Permissions>Settings ***/
user_pref("network.cookie.lifetimePolicy", 2);
/* 2802: delete cache on exit [FF96+]
* [NOTE] We already disable disk cache (1001) and clear on exit (2811) which is more robust
* [1] https://bugzilla.mozilla.org/1671182 ***/
// user_pref("privacy.clearsitedata.cache.enabled", true);
/** SANITIZE ON SHUTDOWN : ALL OR NOTHING ***/
/* 2810: enable Thunderbird to clear items on shutdown (2811)
* [SETTING] Privacy & Security>History>Custom Settings>Clear history when Thunderbird closes ***/
/* 2810: enable Thunderbird to clear items on shutdown ***/
user_pref("privacy.sanitize.sanitizeOnShutdown", true);
/** SANITIZE ON SHUTDOWN: IGNORES "ALLOW" SITE EXCEPTIONS ***/
/* 2811: set/enforce what items to clear on shutdown (if 2810 is true) [SETUP-CHROME]
* These items do not use exceptions, it is all or nothing (1681701)
* [NOTE] If "history" is true, downloads will also be cleared
* [NOTE] "sessions": Active Logins: refers to HTTP Basic Authentication [1], not logins via cookies
* [NOTE] "offlineApps": 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); // [DEFAULT: true]
user_pref("privacy.clearOnShutdown.downloads", true); // [DEFAULT: true]
user_pref("privacy.clearOnShutdown.formdata", true); // [DEFAULT: true]
user_pref("privacy.clearOnShutdown.history", true); // [DEFAULT: true]
user_pref("privacy.clearOnShutdown.sessions", true); // [DEFAULT: true]
user_pref("privacy.clearOnShutdown.offlineApps", true); // [DEFAULT: false]
user_pref("privacy.clearOnShutdown.cookies", true);
// user_pref("privacy.clearOnShutdown.siteSettings", false);
// user_pref("privacy.clearOnShutdown.siteSettings", false); // [DEFAULT: false]
/* 2812: set Session Restore to clear on shutdown (if 2810 is true) [FF34+]
* [NOTE] Not needed if Session Restore is not used (0102) or it is already cleared with history (2811)
* [NOTE] If true, this prevents resuming from crashes (also see 5008) ***/
// user_pref("privacy.clearOnShutdown.openWindows", true);
/** SANITIZE MANUAL: ALL OR NOTHING ***/
/** SANITIZE ON SHUTDOWN: RESPECTS "ALLOW" SITE EXCEPTIONS FF103+ ***/
/* 2815: set "Cookies" and "Site Data" to clear on shutdown (if 2810 is true) [SETUP-CHROME]
* [NOTE] Exceptions: A "cookie" block permission also controls "offlineApps" (see note below).
* serviceWorkers require an "Allow" permission. For cross-domain logins, add exceptions for
* both sites e.g. https://www.youtube.com (site) + https://accounts.google.com (single sign on)
* [NOTE] "offlineApps": Offline Website Data: localStorage, service worker cache, QuotaManager (IndexedDB, asm-cache)
* [WARNING] Be selective with what sites you "Allow", as they also disable partitioning (1767271)
* [SETTING] to add site exceptions: Ctrl+I>Permissions>Cookies>Allow (when on the website in question)
* [SETTING] to manage site exceptions: Options>Privacy & Security>Permissions>Settings ***/
user_pref("privacy.clearOnShutdown.cookies", true); // Cookies
user_pref("privacy.clearOnShutdown.offlineApps", true); // Site Data
/** SANITIZE MANUAL: IGNORES "ALLOW" SITE EXCEPTIONS ***/
/* 2820: reset default items to clear with Ctrl-Shift-Del [SETUP-CHROME]
* This dialog can also be accessed from the menu History>Clear Recent History
* Thunderbird remembers your last choices. This will reset them when you start Thunderbird
@ -784,13 +686,9 @@ user_pref("privacy.cpd.sessions", true); // [DEFAULT: true]
user_pref("privacy.cpd.offlineApps", true); // [DEFAULT: false]
user_pref("privacy.cpd.cookies", true);
// user_pref("privacy.cpd.downloads", true); // not used, see note above
// user_pref("privacy.cpd.openWindows", false); // Session Restore
// user_pref("privacy.cpd.passwords", false);
// user_pref("privacy.cpd.siteSettings", false);
/* 2821: clear Session Restore data when sanitizing on shutdown or manually [FF34+]
* [NOTE] Not needed if Session Restore is not used (0102) or it is already cleared with history (2811)
* [NOTE] privacy.clearOnShutdown.openWindows prevents resuming from crashes (also see 5008) ***/
// user_pref("privacy.clearOnShutdown.openWindows", true);
// user_pref("privacy.cpd.openWindows", true);
/* 2822: reset default "Time range to clear" for "Clear Recent History" (2820)
* 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
@ -801,21 +699,19 @@ user_pref("privacy.sanitize.timeSpan", 0);
/*** [SECTION 4500]: RFP (RESIST FINGERPRINTING)
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
[TEST] https://arkenfox.github.io/TZP/tzp.html
[WARNING] DO NOT USE extensions to alter RFP protected metrics
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 (FF50-99)
FF53: fixes GetSupportedNames in nsMimeTypeArray and nsPluginArray (1324044)
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
version: spoofed as ESR (FF102+ this is limited to Android)
version: android version spoofed as ESR
OS: JS spoofed 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
@ -828,8 +724,7 @@ user_pref("privacy.sanitize.timeSpan", 0);
1217290 & 1409677 - enable some fingerprinting resistance for WebGL
1382545 - reduce fingerprinting in Animation API
1354633 - limit MediaError.message to a whitelist
FF58-90
967895 - spoof canvas and enable site permission prompt (FF58)
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
@ -848,19 +743,23 @@ user_pref("privacy.sanitize.timeSpan", 0);
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)
1506364 - return "no-preference" with prefers-contrast (FF80)
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)
1756280 - enforce navigator.pdfViewerEnabled as true and plugins/mimeTypes as hard-coded values (FF100)
1692609 - reduce JS timing precision to 16.67ms (previously FF55+ was capped at 100ms) (FF102)
1692609 - reduce JS timing precision to 16.67ms (previously FF55+ was 100ms) (FF102)
1422237 - return "srgb" with color-gamut (FF110)
1794628 - return "none" with inverted-colors (FF114)
***/
user_pref("_user.js.parrot", "4500 syntax error: the parrot's popped 'is clogs");
/* 4501: enable privacy.resistFingerprinting [FF41+]
/* 4501: enable privacy.resistFingerprinting
* [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
* [NOTE] pbmode applies if true and the original pref is false
* [1] https://bugzilla.mozilla.org/418986 ***/
user_pref("privacy.resistFingerprinting", true);
user_pref("privacy.resistFingerprinting", true); // [FF41+]
// user_pref("privacy.resistFingerprinting.pbmode", true); // [FF114+]
/* 4502: set new window size rounding max values [FF55+]
* [SETUP-CHROME] sizes round down in hundreds: width to 200s and height to 100s, to fit your screen
* [1] https://bugzilla.mozilla.org/1330882 ***/
@ -869,7 +768,7 @@ user_pref("privacy.window.maxInnerHeight", 900);
/* 4503: disable mozAddonManager Web API [FF57+]
* [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]
user_pref("privacy.resistFingerprinting.block_mozAddonManager", true); // [HIDDEN PREF FF57-108]
/* 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.
@ -885,12 +784,11 @@ user_pref("privacy.resistFingerprinting.letterboxing", true); // [HIDDEN PREF]
* [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);
/* 4506: set RFP's font visibility level (1402) [FF94+] ***/
// user_pref("layout.css.font-visibility.resistFingerprinting", 1); // [DEFAULT: 1]
/* 4510: disable using system colors
* [SETTING] General > Language and Appearance > Fonts and Colors > Colors > Use system colors ***/
user_pref("browser.display.use_system_colors", false); // [DEFAULT false NON-WINDOWS]
* [SETTING] General > Language and Appearance > Fonts and Colors > Colors... > Use system colors ***/
user_pref("browser.display.use_system_colors", false); // [DEFAULT: false NON-WINDOWS]
/* 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]
@ -925,7 +823,7 @@ user_pref("_user.js.parrot", "5000 syntax error: the parrot's taken 'is last bow
* 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.
* a temporary self-contained new session. Close all private windows to clear the PB 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);
@ -943,7 +841,7 @@ 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 in FF101 or lower]
// user_pref("security.nocertdb", true);
/* 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
@ -963,8 +861,20 @@ user_pref("browser.sessionstore.resume_from_crash", false);
* [NOTE] We also clear history and downloads on exit (2811) ***/
user_pref("places.history.enabled", false);
/* 5016: discourage downloading to desktop
* 0=desktop, 1=downloads (default), 2=last used ***/
* 0=desktop, 1=downloads (default), 2=custom ***/
// user_pref("browser.download.folderList", 2);
/* 5017: disable Form Autofill
* If .supportedCountries includes your region (browser.search.region) and .supported
* is "detect" (default), then the UI will show. Stored data is not secure, uses JSON
* [1] https://wiki.mozilla.org/Firefox/Features/Form_Autofill ***/
user_pref("extensions.formautofill.addresses.enabled", false); // [FF55+]
user_pref("extensions.formautofill.creditCards.enabled", false); // [FF56+]
/* 5018: limit events that can cause a pop-up ***/
user_pref("dom.popup_allowed_events", "click dblclick mousedown pointerdown");
/* 5019: disable page thumbnail collection ***/
user_pref("browser.pagethumbnails.capturing_disabled", true); // [HIDDEN PREF]
/* 5020: disable Windows native notifications and use app notications instead [FF111+] [WINDOWS] ***/
// user_pref("alerts.useSystemBackend.windows.notificationserver.enabled", false);
/* 5901: Enforce Private Browsing for OAuth sign-in
* Providers may expect a device identifier from the browser, which could cause issues with PB. As
* many users could suffer from this we keep this it disabled, feel free to switch it on if yours
@ -1009,6 +919,26 @@ user_pref("javascript.options.jit_trustedprincipals", true); // [FF75+] [HIDDEN
* [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);
/* 5507: disable rendering of SVG OpenType fonts ***/
user_pref("gfx.font_rendering.opentype_svg.enabled", false);
/* 5508: disable all DRM content (EME: Encryption Media Extension)
* Optionally hide the UI setting which also disables the DRM prompt
* [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);
user_pref("browser.eme.ui.enabled", false);
/* 5509: disable IPv6 if using a VPN
* This is an application level fallback. Disabling IPv6 is best done at an OS/network
* level, and/or configured properly in system wide VPN setups.
* If you see PR_CONNECT_RESET_ERROR, this pref *might* be the cause
* [NOTE] PHP defaults to IPv6 with "localhost". Use "php -S 127.0.0.1:PORT"
* [TEST] https://ipleak.org/
* [1] https://www.internetsociety.org/tag/ipv6-security/ (Myths 2,4,5,6) ***/
// user_pref("network.dns.disableIPv6", true);
/* 5510: control when to send a cross-origin referer
* 0=always (default), 1=only if base domains match, 2=only if hosts match
* [NOTE] Will cause breakage: older modems/routers and some sites e.g banks, vimeo, icloud, instagram ***/
user_pref("network.http.referer.XOriginPolicy", 2);
/* 5590: show a prompt when opening a link in external applications ***/
user_pref("security.external_protocol_requires_permission", true);
@ -1025,36 +955,38 @@ user_pref("network.http.referer.spoofSource", false); // [DEFAULT: false]
* [1] https://www.squarefree.com/2004/07/01/race-conditions-in-security-dialogs/ ***/
user_pref("security.dialog_enable_delay", 1000); // [DEFAULT: 1000]
/* 6008: enforce no First Party Isolation [FF51+]
* [WARNING] Replaced with network partitioning (FF85+) and TCP (2701),
* and enabling FPI disables those. FPI is no longer maintained ***/
* [WARNING] Replaced with network partitioning (FF85+) and TCP (2701), and enabling FPI
* disables those. FPI is no longer maintained except at Tor Project for Tor Browser's config ***/
user_pref("privacy.firstparty.isolate", false); // [DEFAULT: false]
/* 6009: enforce SmartBlock shims [FF81+]
* In FF96+ these are listed in about:compat
* [1] https://blog.mozilla.org/security/2021/03/23/introducing-smartblock/ ***/
user_pref("extensions.webcompat.enable_shims", true); // [DEFAULT: true]
/* 6010: enforce/reset TLS 1.0/1.1 downgrades to session only
* [NOTE] In FF97+ the TLS 1.0/1.1 downgrade UX was removed
/* 6010: enforce no TLS 1.0/1.1 downgrades
* [TEST] https://tls-v1-1.badssl.com:1010/ ***/
user_pref("security.tls.version.enable-deprecated", false); // [DEFAULT: false]
/* 6011: enforce disabling of Web Compatibility Reporter [FF56+]
* Web Compatibility Reporter adds a "Report Site Issue" button to send data to Mozilla
* [WHY] To prevent wasting Mozilla's time with a custom setup ***/
user_pref("extensions.webcompat-reporter.enabled", false); // [DEFAULT: false]
/* 6012: disable SHA-1 certificates ***/
user_pref("security.pki.sha1_enforcement_level", 1); // [DEFAULT: 1 FF102+]
/* 6050: prefsCleaner: reset items removed from arkenfox FF92+ ***/
// user_pref("browser.urlbar.trimURLs", "");
// user_pref("dom.caches.enabled", "");
// user_pref("dom.storageManager.enabled", "");
// user_pref("dom.storage_access.enabled", "");
// user_pref("dom.targetBlankNoOpener.enabled", "");
// user_pref("network.cookie.thirdparty.sessionOnly", "");
// user_pref("network.cookie.thirdparty.nonsecureSessionOnly", "");
// user_pref("privacy.firstparty.isolate.block_post_message", "");
// user_pref("privacy.firstparty.isolate.restrict_opener_access", "");
// user_pref("privacy.firstparty.isolate.use_site", "");
// user_pref("privacy.window.name.update.enabled", "");
// user_pref("security.insecure_connection_text.enabled", "");
/* 6012: enforce Quarantined Domains [FF115+]
* [WHY] https://support.mozilla.org/kb/quarantined-domains */
user_pref("extensions.quarantinedDomains.enabled", true); // [DEFAULT: true]
/* 6050: prefsCleaner: reset previously active items removed from arkenfox FF102+ ***/
// user_pref("beacon.enabled", "");
// user_pref("browser.region.network.url", "");
// user_pref("browser.region.update.enabled", "");
// user_pref("browser.ssl_override_behavior", "");
// user_pref("devtools.chrome.enabled", "");
// user_pref("dom.disable_beforeunload", "");
// user_pref("dom.disable_open_during_load", "");
// user_pref("extensions.formautofill.available", "");
// user_pref("extensions.formautofill.addresses.supported", "");
// user_pref("extensions.formautofill.creditCards.available", "");
// user_pref("extensions.formautofill.creditCards.supported", "");
// user_pref("middlemouse.contentLoadURL", "");
/* 6051: prefsCleaner: reset previously active items removed from arkenfox FF115+ ***/
// user_pref("network.protocol-handler.external.ms-windows-store", "");
/*** [SECTION 7000]: DON'T BOTHER
Thunderbird-User.JS maintainer here :
@ -1063,18 +995,16 @@ user_pref("security.pki.sha1_enforcement_level", 1); // [DEFAULT: 1 FF102+]
***/
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 ***/
* Location-Aware Browsing, Full Screen
* [WHY] The API state is easily fingerprintable.
* Geo is behind a prompt (7002). 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); // [DEFAULT: false FF97+]
/* 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_ecdsa_aes_256_sha", false); // [DEFAULT: false FF109+]
// user_pref("security.ssl3.ecdhe_ecdsa_aes_128_sha", false); // [DEFAULT: false FF109+]
// 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
@ -1088,13 +1018,13 @@ user_pref("dom.vr.enabled", false); // [DEFAULT: false FF97+]
/* 7005: disable SSL session IDs [FF36+]
* [WHY] Passive fingerprinting and perf costs. These are session-only
* and isolated with network partitioning (FF85+) and/or containers ***/
// user_pref("security.ssl.disable_session_identifiers", true); // [HIDDEN PREF in FF101 or lower]
// user_pref("security.ssl.disable_session_identifiers", true);
/* 7006: onions
* [WHY] Thunderbird doesn't support hidden services. Use Tor Browser ***/
// user_pref("dom.securecontext.allowlist_onions", true); // [FF97+] 1382359/1744006
// user_pref("network.http.referer.hideOnionSource", true); // 1305144
/* 7007: referers
* [WHY] Only cross-origin referers (1600s) need control ***/
* [WHY] Only cross-origin referers (1602, 5510) matter ***/
user_pref("network.http.sendRefererHeader", 0);
user_pref("network.http.referer.trimmingPolicy", 0);
/* 7008: set the default Referrer Policy [FF59+]
@ -1105,7 +1035,6 @@ user_pref("network.http.referer.defaultPolicy.pbmode", 0); // [DEFAULT: 2]
/* 7010: disable HTTP Alternative Services [FF37+]
* [WHY] Already isolated with network partitioning (FF85+) ***/
user_pref("network.http.altsvc.enabled", false);
// user_pref("network.http.altsvc.oe", false); // [DEFAULT: false FF94+]
/* 7011: disable website control over browser right-click context menu
* [WHY] Just use Shift-Right-Click ***/
user_pref("dom.event.contextmenu.enabled", false);
@ -1128,7 +1057,7 @@ user_pref("dom.event.clipboardevents.enabled", false);
// user_pref("privacy.donottrackheader.enabled", true);
/* 7016: customize ETP settings
* [WHY] Arkenfox only supports strict (2701) which sets these at runtime ***/
// user_pref("network.cookie.cookieBehavior", 5);
// user_pref("network.cookie.cookieBehavior", 5); // [DEFAULT: 5 FF103+]
// user_pref("network.http.referer.disallowCrossSiteRelaxingDefault", true);
// user_pref("network.http.referer.disallowCrossSiteRelaxingDefault.top_navigation", true); // [FF100+]
// user_pref("privacy.partition.network_state.ocsp_cache", true);
@ -1138,8 +1067,7 @@ user_pref("dom.event.clipboardevents.enabled", false);
// user_pref("privacy.trackingprotection.cryptomining.enabled", true); // [DEFAULT: true]
// user_pref("privacy.trackingprotection.fingerprinting.enabled", true); // [DEFAULT: true]
/* 7017: disable service workers
* [WHY] Already isolated (FF96+) with TCP (2701) behind a pref (2710)
* or blocked with TCP in 3rd parties (FF95 or lower) ***/
* [WHY] Already isolated with TCP (2701) behind a pref (2710) ***/
// user_pref("dom.serviceWorkers.enabled", false);
/* 7018: disable Web Notifications
* [WHY] Web Notifications are behind a prompt (7002)
@ -1151,6 +1079,13 @@ user_pref("dom.event.clipboardevents.enabled", false);
* [NOTE] To remove all subscriptions, reset "dom.push.userAgentID"
* [1] https://support.mozilla.org/kb/push-notifications-firefox ***/
// user_pref("dom.push.enabled", false);
/* 7020: disable WebRTC (Web Real-Time Communication)
* [WHY] Firefox desktop uses mDNS hostname obfuscation and the private IP is never exposed until
* required in TRUSTED scenarios; i.e. after you grant device (microphone or camera) access
* [TEST] https://browserleaks.com/webrtc
* [1] https://groups.google.com/g/discuss-webrtc/c/6stQXi72BEU/m/2FwZd24UAQAJ
* [2] https://datatracker.ietf.org/doc/html/draft-ietf-mmusic-mdns-ice-candidates#section-3.1.1 ***/
user_pref("media.peerconnection.enabled", false);
/*** [SECTION 8000]: DON'T BOTHER: FINGERPRINTING
[WHY] They are insufficient to help anti-fingerprinting and do more harm than good
@ -1158,81 +1093,41 @@ user_pref("dom.event.clipboardevents.enabled", false);
[NOTE] An empty User-Agent may break Microsoft Exchange OAuth2 login
***/
user_pref("_user.js.parrot", "8000 syntax error: the parrot's crossed the Jordan");
/* 8001: disable APIs ***/
// user_pref("device.sensors.enabled", false);
// user_pref("dom.enable_performance", false);
// user_pref("dom.enable_resource_timing", false);
// user_pref("dom.gamepad.enabled", false);
// user_pref("dom.netinfo.enabled", false); // [DEFAULT: false NON-ANDROID: false ANDROID FF99+]
// 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);
// 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]
// user_pref("general.appversion.override", ""); // [HIDDEN PREF]
// user_pref("general.buildID.override", ""); // [HIDDEN PREF]
// user_pref("general.oscpu.override", ""); // [HIDDEN PREF]
// user_pref("general.platform.override", ""); // [HIDDEN PREF]
// user_pref("general.useragent.override", ""); // [HIDDEN PREF]
// user_pref("ui.use_standins_for_native_colors", true);
/* 8001: prefsCleaner: reset items useless for anti-fingerprinting ***/
// user_pref("browser.display.use_document_fonts", "");
// user_pref("browser.zoom.siteSpecific", "");
// user_pref("device.sensors.enabled", "");
// user_pref("dom.enable_performance", "");
// user_pref("dom.enable_resource_timing", "");
// user_pref("dom.gamepad.enabled", "");
// user_pref("dom.maxHardwareConcurrency", "");
// user_pref("dom.w3c_touch_events.enabled", "");
// user_pref("dom.webaudio.enabled", "");
// user_pref("font.system.whitelist", "");
// user_pref("general.appname.override", "");
// user_pref("general.appversion.override", "");
// user_pref("general.buildID.override", "");
// user_pref("general.oscpu.override", "");
// user_pref("general.platform.override", "");
// user_pref("general.useragent.override", "");
// user_pref("media.navigator.enabled", "");
// user_pref("media.ondevicechange.enabled", "");
// user_pref("media.video_stats.enabled", "");
// user_pref("media.webspeech.synth.enabled", "");
// user_pref("ui.use_standins_for_native_colors", "");
// user_pref("webgl.enable-debug-renderer-info", "");
/*** [SECTION 9000]: PERSONAL
Non-project related but useful. If any interest you, add them to your overrides
***/
/*** [SECTION 9000]: NON-PROJECT RELATED ***/
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("browser.tabs.warnOnClose", false); // [DEFAULT false FF94+]
// user_pref("browser.tabs.warnOnOpen", false);
// user_pref("full-screen-api.warning.delay", 0);
// user_pref("full-screen-api.warning.timeout", 0);
/* UPDATES ***/
// user_pref("app.update.auto", false); // [NON-WINDOWS] disable auto app updates
// [NOTE] You will still get prompts to update, and should do so in a timely manner
// user_pref("browser.search.update", false); // disable search engine updates (e.g. OpenSearch)
// [NOTE] This does not affect Mozilla's built-in or Web Extension search engines
// user_pref("extensions.update.enabled", false); // disable extension and theme update checks
// user_pref("extensions.update.autoUpdateDefault", false); // disable installing extension and theme updates
// [SETTING] about:addons>Extensions>[cog-wheel-icon]>Update Add-ons Automatically (toggle)
// user_pref("extensions.getAddons.cache.enabled", false); // disable extension metadata (extension detail tab)
/* APPEARANCE ***/
// 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
// user_pref("ui.systemUsesDarkTheme", 1); // [FF67+] [HIDDEN PREF]
// 0=light, 1=dark: 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]
/* UX BEHAVIOR ***/
// user_pref("general.autoScroll", false); // middle-click enabling auto-scrolling [DEFAULT: false on Linux]
// user_pref("mail.tabs.autoHide", true); // hides the tab bar if there is only one tab
// 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)
/* RETURN RECEIPT BEHAVIOR ***/
// user_pref("mail.mdn.report.enabled", false); // disable return receipt sending unconditionally
/* CUSTOM HEADERS ***/
/* 9001: disable welcome notices ***/
user_pref("browser.startup.homepage_override.mstone", "ignore");
/* 9090: disable return receipt sending unconditionally ***/
// user_pref("mail.mdn.report.enabled", false);
/* 9099: e-mail custom headers (examples) ***/
// user_pref("mail.compose.other.header", "X-Custom-Header,X-Another-Custom-Header"); // corresponding values can be set in compose window ("double-arrow" drop-down)
// 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>");
user_pref("mail.identity.id1.headers", "");
user_pref("mail.identity.id1.header.References", "");
user_pref("mail.identity.id1.header.InReplyTo", "");
/*** [SECTION 9100]: THUNDERBIRD (AUTO CONFIG / UI / HEADERS / ADDRESS BOOK)
Options general to Thunderbird's mail configuration and user interface
@ -1548,61 +1443,34 @@ user_pref("mail.openpgp.allow_external_gnupg", true); // [HIDDEN PREF]
[1] https://github.com/arkenfox/user.js/issues/123
***/
user_pref("_user.js.parrot", "9999 syntax error: the parrot's shuffled off 'is mortal coil!");
/* ESR91.x still uses all the following prefs
// [NOTE] replace the * with a slash in the line above to re-enable them
// FF93
// 7003: disable non-modern cipher suites
// [-] https://bugzilla.mozilla.org/1724072
// user_pref("security.ssl3.rsa_des_ede3_sha", false); // 3DES
// FF94
// 1402: limit font visibility (Windows, Mac, some Linux) [FF79+] - replaced by new 1402
// [-] https://bugzilla.mozilla.org/1715507
// user_pref("layout.css.font-visibility.level", 1);
// FF96
// 0302: disable auto-INSTALLING Thunderbird updates via a background service + hide the setting [FF90+] [WINDOWS]
// [1] https://support.mozilla.org/kb/enable-background-updates-firefox-windows
// [-] https://bugzilla.mozilla.org/1738983
user_pref("app.update.background.scheduling.enabled", false);
// FF97
// 7006: onions - replaced by new 7006 "allowlist"
// [-] https://bugzilla.mozilla.org/1744006
// user_pref("dom.securecontext.whitelist_onions", true); // 1382359
// FF99
// 6003: enforce CSP (Content Security Policy)
// [1] https://developer.mozilla.org/docs/Web/HTTP/CSP
// [-] https://bugzilla.mozilla.org/1754301
user_pref("security.csp.enable", true); // [DEFAULT: true]
// FF100
// 7009: disable HTTP2 - replaced by network.http.http2* prefs
// [WHY] Passive fingerprinting. ~50% of sites use HTTP2 [1]
// [1] https://w3techs.com/technologies/details/ce-http2/all/all
// [-] https://bugzilla.mozilla.org/1752621
// 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+]
// FF101
// 9211: Behavior when sending HTML message
// (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
// [-] https://bugzilla.mozilla.org/1727493
user_pref("mail.default_html_action", 1);
// 9213: Downgrade email to plaintext by default
// [-] https://bugzilla.mozilla.org/1727493
user_pref("mailnews.sendformat.auto_downgrade", true);
// FF102
// 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)
// [-] https://bugzilla.mozilla.org/1767099
user_pref("security.ask_for_password", 2);
// 0902: set how long in minutes Thunderbird should remember the primary password (0901)
// [-] https://bugzilla.mozilla.org/1767099
user_pref("security.password_lifetime", 5); // [DEFAULT: 30]
// 6007: enforce Local Storage Next Generation (LSNG) [FF65+]
// [-] https://bugzilla.mozilla.org/1764696
user_pref("dom.storage.next_gen", true); // [DEFAULT: true FF92+]
/* ESR102.x still uses all the following prefs
// [NOTE] replace the * with a slash in the line above to re-enable active ones
// FF103
// 2801: delete cookies and site data on exit - replaced by sanitizeOnShutdown* (2810)
// 0=keep until they expire (default), 2=keep until you close Thunderbird
// [-] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1681493,1681495,1681498,1759665,1764761
user_pref("network.cookie.lifetimePolicy", 2);
// 6012: disable SHA-1 certificates
// [-] https://bugzilla.mozilla.org/1766687
// user_pref("security.pki.sha1_enforcement_level", 1); // [DEFAULT: 1]
// FF114
// 2816: set cache to clear on exit [FF96+]
// [NOTE] We already disable disk cache (1001) and clear on exit (2811) which is more robust
// [1] https://bugzilla.mozilla.org/1671182
// [-] https://bugzilla.mozilla.org/1821651
// user_pref("privacy.clearsitedata.cache.enabled", true);
// 4505: experimental RFP [FF91+]
// [-] https://bugzilla.mozilla.org/1824235
// user_pref("privacy.resistFingerprinting.testGranularityMask", 0);
// 5017: disable Form Autofill heuristics
// Heuristics controls Form Autofill on forms without @autocomplete attributes
// [-] https://bugzilla.mozilla.org/1829670
// user_pref("extensions.formautofill.heuristics.enabled", false); // [FF55+]
// FF115
// 7001: disable offline cache (appCache)
// [NOTE] appCache storage capability was removed in FF90
// [-] https://bugzilla.mozilla.org/1677718
// user_pref("browser.cache.offline.enable", false);
// ***/
/* END: internal custom pref to test for syntax errors ***/