0adfddd1e2
* misc - cleanup of old release notation in comments: e.g. if it's not applicable to ESR78+ - same with default version info - simplify and save bytes on section 4700 - update 4500 header - and unify the message about using extensions as counterproductive - letterboxing - provide info on stepped ranged (and drop crap about FF67) - don't judge users who dislike seeing margins (I don't like them either, but I force my window to exact dimensions and stay there) - screenshots uploading was disabled in FF67+ : [67 release notes](https://www.mozilla.org/en-US/firefox/67.0/releasenotes/) - the pref is still there (default false) but so far I'm 99% sure this pref now does anything - I will add it to the scatchpad script if this change sticks * simplify 4500 RFP, see #1041 * update removed script * tidy readme, see #1045 - also put readme before releases * RIP FX Site Compat * clean out RFP Alts info: the information is redundant: it's already in the readme
1657 lines
102 KiB
JavaScript
1657 lines
102 KiB
JavaScript
/******
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* name: arkenfox user.js
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* date: 13 Oct 2020
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* version 82-alpha
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* url: https://github.com/arkenfox/user.js
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* license: MIT: https://github.com/arkenfox/user.js/blob/master/LICENSE.txt
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* README:
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1. Consider using Tor Browser if it meets your needs or fits your threat model better
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* https://www.torproject.org/about/torusers.html.en
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2. Required reading: Overview, Backing Up, Implementing, and Maintenance entries
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* https://github.com/arkenfox/user.js/wiki
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3. If you skipped step 2, return to step 2
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4. Make changes
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* There are often trade-offs and conflicts between security vs privacy vs anti-fingerprinting
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and these need to be balanced against functionality & convenience & breakage
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* Some site breakage and unintended consequences will happen. Everyone's experience will differ
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e.g. some user data is erased on close (section 2800), change this to suit your needs
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* While not 100% definitive, search for "[SETUP" tags
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* Take the wiki link in step 2 and read the Troubleshooting entry
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5. Some tag info
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[SETUP-SECURITY] it's one item, read it
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[SETUP-WEB] can cause some websites to break
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[SETUP-CHROME] changes how Firefox itself behaves (i.e. not directly website related)
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[SETUP-PERF] may impact performance
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[WARNING] used sparingly, heed them
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* RELEASES
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* Archive: https://github.com/arkenfox/user.js/releases
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* Use the correct release that matches your Firefox version
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* Each release
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- run the prefsCleaner or reset deprecated prefs (9999s) and prefs made redundant by RFP (4600s)
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- re-enable section 4600 if you don't use RFP
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* INDEX:
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0100: STARTUP
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0200: GEOLOCATION / LANGUAGE / LOCALE
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0300: QUIET FOX
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0400: BLOCKLISTS / SAFE BROWSING
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0500: SYSTEM ADD-ONS / EXPERIMENTS
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0600: BLOCK IMPLICIT OUTBOUND
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0700: HTTP* / TCP/IP / DNS / PROXY / SOCKS etc
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0800: LOCATION BAR / SEARCH BAR / SUGGESTIONS / HISTORY / FORMS
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0900: PASSWORDS
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1000: CACHE / SESSION (RE)STORE / FAVICONS
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1200: HTTPS (SSL/TLS / OCSP / CERTS / HPKP / CIPHERS)
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1400: FONTS
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1600: HEADERS / REFERERS
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1700: CONTAINERS
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1800: PLUGINS
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2000: MEDIA / CAMERA / MIC
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2200: WINDOW MEDDLING & LEAKS / POPUPS
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2300: WEB WORKERS
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2400: DOM (DOCUMENT OBJECT MODEL) & JAVASCRIPT
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2500: HARDWARE FINGERPRINTING
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2600: MISCELLANEOUS
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2700: PERSISTENT STORAGE
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2800: SHUTDOWN
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4000: FPI (FIRST PARTY ISOLATION)
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4500: RFP (RESIST FINGERPRINTING)
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4600: RFP ALTERNATIVES
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4700: RFP ALTERNATIVES (USER AGENT SPOOFING)
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5000: PERSONAL
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9999: DEPRECATED / REMOVED / LEGACY / RENAMED
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******/
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/* START: internal custom pref to test for syntax errors
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* [NOTE] In FF60+, not all syntax errors cause parsing to abort i.e. reaching the last debug
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* pref no longer necessarily means that all prefs have been applied. Check the console right
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* after startup for any warnings/error messages related to non-applied prefs
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* [1] https://blog.mozilla.org/nnethercote/2018/03/09/a-new-preferences-parser-for-firefox/ ***/
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user_pref("_user.js.parrot", "START: Oh yes, the Norwegian Blue... what's wrong with it?");
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/* 0000: disable about:config warning
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* FF71-72: chrome://global/content/config.xul
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* FF73+: chrome://global/content/config.xhtml ***/
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user_pref("general.warnOnAboutConfig", false); // XUL/XHTML version
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user_pref("browser.aboutConfig.showWarning", false); // HTML version [FF71+]
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/*** [SECTION 0100]: STARTUP ***/
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user_pref("_user.js.parrot", "0100 syntax error: the parrot's dead!");
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/* 0101: disable default browser check
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* [SETTING] General>Startup>Always check if Firefox is your default browser ***/
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user_pref("browser.shell.checkDefaultBrowser", false);
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/* 0102: set START page (0=blank, 1=home, 2=last visited page, 3=resume previous session)
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* [NOTE] Session Restore is not used in PB mode (0110) and is cleared with history (2803, 2804)
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* [SETTING] General>Startup>Restore previous session ***/
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user_pref("browser.startup.page", 0);
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/* 0103: set HOME+NEWWINDOW page
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* about:home=Activity Stream (default, see 0105), custom URL, about:blank
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* [SETTING] Home>New Windows and Tabs>Homepage and new windows ***/
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user_pref("browser.startup.homepage", "about:blank");
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/* 0104: set NEWTAB page
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* true=Activity Stream (default, see 0105), false=blank page
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* [SETTING] Home>New Windows and Tabs>New tabs ***/
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user_pref("browser.newtabpage.enabled", false);
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user_pref("browser.newtab.preload", false);
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/* 0105: disable Activity Stream stuff (AS)
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* AS is the default homepage/newtab in FF57+, based on metadata and browsing behavior.
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* **NOT LISTING ALL OF THESE: USE THE PREFERENCES UI**
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* [SETTING] Home>Firefox Home Content>... to show/hide what you want ***/
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/* 0105a: disable Activity Stream telemetry ***/
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user_pref("browser.newtabpage.activity-stream.feeds.telemetry", false);
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user_pref("browser.newtabpage.activity-stream.telemetry", false);
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/* 0105b: disable Activity Stream Snippets
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* Runs code received from a server (aka Remote Code Execution) and sends information back to a metrics server
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* [1] https://abouthome-snippets-service.readthedocs.io/ ***/
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user_pref("browser.newtabpage.activity-stream.feeds.snippets", false);
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user_pref("browser.newtabpage.activity-stream.asrouter.providers.snippets", "{}");
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/* 0105c: disable Activity Stream Top Stories, Pocket-based and/or sponsored content ***/
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user_pref("browser.newtabpage.activity-stream.feeds.section.topstories", false);
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user_pref("browser.newtabpage.activity-stream.section.highlights.includePocket", false);
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user_pref("browser.newtabpage.activity-stream.showSponsored", false);
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user_pref("browser.newtabpage.activity-stream.feeds.discoverystreamfeed", false); // [FF66+]
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/* 0105d: disable Activity Stream recent Highlights in the Library [FF57+] ***/
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// user_pref("browser.library.activity-stream.enabled", false);
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/* 0105e: clear default topsites
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* [NOTE] This does not block you from adding your own ***/
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user_pref("browser.newtabpage.activity-stream.default.sites", "");
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/* 0110: start Firefox in PB (Private Browsing) mode
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* [NOTE] In this mode *all* windows are "private windows" and the PB mode icon is not displayed
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* [WARNING] The P in PB mode is misleading: it means no "persistent" disk storage such as history,
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* caches, searches, cookies, localStorage, IndexedDB etc (which you can achieve in normal mode).
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* In fact, PB mode limits or removes the ability to control some of these, and you need to quit
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* Firefox to clear them. PB is best used as a one off window (File>New Private Window) to provide
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* a temporary self-contained new session. Close all Private Windows to clear the PB mode session.
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* [SETTING] Privacy & Security>History>Custom Settings>Always use private browsing mode
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* [1] https://wiki.mozilla.org/Private_Browsing
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* [2] https://spreadprivacy.com/is-private-browsing-really-private/ ***/
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// user_pref("browser.privatebrowsing.autostart", true);
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/*** [SECTION 0200]: GEOLOCATION / LANGUAGE / LOCALE ***/
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user_pref("_user.js.parrot", "0200 syntax error: the parrot's definitely deceased!");
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/** GEOLOCATION ***/
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/* 0201: disable Location-Aware Browsing
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* [NOTE] Best left at default "true", fingerprintable, is already behind a prompt (see 0202)
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* [1] https://www.mozilla.org/firefox/geolocation/ ***/
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// user_pref("geo.enabled", false);
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/* 0202: set a default permission for Location (see 0201) [FF58+]
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* 0=always ask (default), 1=allow, 2=block
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* [NOTE] Best left at default "always ask", fingerprintable via Permissions API
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* [SETTING] to add site exceptions: Page Info>Permissions>Access Your Location
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* [SETTING] to manage site exceptions: Options>Privacy & Security>Permissions>Location>Settings ***/
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// user_pref("permissions.default.geo", 2);
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/* 0203: use Mozilla geolocation service instead of Google when geolocation is enabled [FF74+]
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* Optionally enable logging to the console (defaults to false) ***/
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user_pref("geo.provider.network.url", "https://location.services.mozilla.com/v1/geolocate?key=%MOZILLA_API_KEY%");
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// user_pref("geo.provider.network.logging.enabled", true); // [HIDDEN PREF]
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/* 0204: disable using the OS's geolocation service ***/
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user_pref("geo.provider.ms-windows-location", false); // [WINDOWS]
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user_pref("geo.provider.use_corelocation", false); // [MAC]
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user_pref("geo.provider.use_gpsd", false); // [LINUX]
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/* 0207: disable region updates
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* [1] https://firefox-source-docs.mozilla.org/toolkit/modules/toolkit_modules/Region.html ***/
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user_pref("browser.region.network.url", ""); // [FF78+]
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user_pref("browser.region.update.enabled", false); // [[FF79+]
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/* 0208: set search region
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* [NOTE] May not be hidden if Firefox has changed your settings due to your region (see 0207) ***/
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// user_pref("browser.search.region", "US"); // [HIDDEN PREF]
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/** LANGUAGE / LOCALE ***/
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/* 0210: set preferred language for displaying web pages
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* [TEST] https://addons.mozilla.org/about ***/
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user_pref("intl.accept_languages", "en-US, en");
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/* 0211: enforce US English locale regardless of the system locale
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* [SETUP-WEB] May break some input methods e.g xim/ibus for CJK languages, see [2]
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* [1] https://bugzilla.mozilla.org/867501
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* [2] https://bugzilla.mozilla.org/1629630 ***/
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user_pref("javascript.use_us_english_locale", true); // [HIDDEN PREF]
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/*** [SECTION 0300]: QUIET FOX
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Starting in user.js v67, we only disable the auto-INSTALL of Firefox. You still get prompts
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to update, in one click. We have NEVER disabled auto-CHECKING, and highly discourage that.
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Previously we also disabled auto-INSTALLING of extensions (302b).
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There are many legitimate reasons to turn off auto-INSTALLS, including hijacked or monetized
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extensions, time constraints, legacy issues, dev/testing, and fear of breakage/bugs. It is
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still important to do updates for security reasons, please do so manually if you make changes.
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***/
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user_pref("_user.js.parrot", "0300 syntax error: the parrot's not pinin' for the fjords!");
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/* 0301b: disable auto-CHECKING for extension and theme updates ***/
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// user_pref("extensions.update.enabled", false);
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/* 0302a: disable auto-INSTALLING Firefox updates [NON-WINDOWS FF65+]
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* [NOTE] In FF65+ on Windows this SETTING (below) is now stored in a file and the pref was removed
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* [SETTING] General>Firefox Updates>Check for updates but let you choose to install them ***/
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user_pref("app.update.auto", false);
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/* 0302b: disable auto-INSTALLING extension and theme updates (after the check in 0301b)
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* [SETTING] about:addons>Extensions>[cog-wheel-icon]>Update Add-ons Automatically (toggle) ***/
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// user_pref("extensions.update.autoUpdateDefault", false);
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/* 0306: disable extension metadata
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* used when installing/updating an extension, and in daily background update checks:
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* when false, extension detail tabs will have no description ***/
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// user_pref("extensions.getAddons.cache.enabled", false);
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/* 0308: disable search engine updates (e.g. OpenSearch)
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* [NOTE] This does not affect Mozilla's built-in or Web Extension search engines ***/
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user_pref("browser.search.update", false);
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/* 0309: disable sending Flash crash reports ***/
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user_pref("dom.ipc.plugins.flash.subprocess.crashreporter.enabled", false);
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/* 0310: disable sending the URL of the website where a plugin crashed ***/
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user_pref("dom.ipc.plugins.reportCrashURL", false);
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/* 0320: disable about:addons' Recommendations pane (uses Google Analytics) ***/
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user_pref("extensions.getAddons.showPane", false); // [HIDDEN PREF]
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/* 0321: disable recommendations in about:addons' Extensions and Themes panes [FF68+] ***/
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user_pref("extensions.htmlaboutaddons.recommendations.enabled", false);
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/* 0330: disable telemetry
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* the pref (.unified) affects the behaviour of the pref (.enabled)
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* IF unified=false then .enabled controls the telemetry module
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* IF unified=true then .enabled ONLY controls whether to record extended data
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* so make sure to have both set as false
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* [NOTE] FF58+ 'toolkit.telemetry.enabled' is now LOCKED to reflect prerelease
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* or release builds (true and false respectively), see [2]
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* [1] https://firefox-source-docs.mozilla.org/toolkit/components/telemetry/telemetry/internals/preferences.html
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* [2] https://medium.com/georg-fritzsche/data-preference-changes-in-firefox-58-2d5df9c428b5 ***/
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user_pref("toolkit.telemetry.unified", false);
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user_pref("toolkit.telemetry.enabled", false); // see [NOTE] above FF58+
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user_pref("toolkit.telemetry.server", "data:,");
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user_pref("toolkit.telemetry.archive.enabled", false);
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user_pref("toolkit.telemetry.newProfilePing.enabled", false); // [FF55+]
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user_pref("toolkit.telemetry.shutdownPingSender.enabled", false); // [FF55+]
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user_pref("toolkit.telemetry.updatePing.enabled", false); // [FF56+]
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user_pref("toolkit.telemetry.bhrPing.enabled", false); // [FF57+] Background Hang Reporter
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user_pref("toolkit.telemetry.firstShutdownPing.enabled", false); // [FF57+]
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/* 0331: disable Telemetry Coverage
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* [1] https://blog.mozilla.org/data/2018/08/20/effectively-measuring-search-in-firefox/ ***/
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user_pref("toolkit.telemetry.coverage.opt-out", true); // [HIDDEN PREF]
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user_pref("toolkit.coverage.opt-out", true); // [FF64+] [HIDDEN PREF]
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user_pref("toolkit.coverage.endpoint.base", "");
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/* 0340: disable Health Reports
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* [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to send technical... data ***/
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user_pref("datareporting.healthreport.uploadEnabled", false);
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/* 0341: disable new data submission, master kill switch [FF41+]
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* If disabled, no policy is shown or upload takes place, ever
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* [1] https://bugzilla.mozilla.org/1195552 ***/
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user_pref("datareporting.policy.dataSubmissionEnabled", false);
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/* 0342: disable Studies (see 0503)
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* [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to install and run studies ***/
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user_pref("app.shield.optoutstudies.enabled", false);
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/* 0343: disable personalized Extension Recommendations in about:addons and AMO [FF65+]
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* [NOTE] This pref has no effect when Health Reports (0340) are disabled
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* [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to make personalized extension recommendations
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* [1] https://support.mozilla.org/kb/personalized-extension-recommendations ***/
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user_pref("browser.discovery.enabled", false);
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/* 0350: disable Crash Reports ***/
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user_pref("breakpad.reportURL", "");
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user_pref("browser.tabs.crashReporting.sendReport", false); // [FF44+]
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user_pref("browser.crashReports.unsubmittedCheck.enabled", false); // [FF51+]
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/* 0351: disable backlogged Crash Reports
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* [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to send backlogged crash reports ***/
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user_pref("browser.crashReports.unsubmittedCheck.autoSubmit2", false); // [FF58+]
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/* 0390: disable Captive Portal detection
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* [1] https://www.eff.org/deeplinks/2017/08/how-captive-portals-interfere-wireless-security-and-privacy
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* [2] https://wiki.mozilla.org/Necko/CaptivePortal ***/
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user_pref("captivedetect.canonicalURL", "");
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user_pref("network.captive-portal-service.enabled", false); // [FF52+]
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/* 0391: disable Network Connectivity checks [FF65+]
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* [1] https://bugzilla.mozilla.org/1460537 ***/
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user_pref("network.connectivity-service.enabled", false);
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/*** [SECTION 0400]: BLOCKLISTS / SAFE BROWSING (SB) ***/
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user_pref("_user.js.parrot", "0400 syntax error: the parrot's passed on!");
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/** BLOCKLISTS ***/
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/* 0401: enforce Firefox blocklist
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* [NOTE] It includes updates for "revoked certificates"
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* [1] https://blog.mozilla.org/security/2015/03/03/revoking-intermediate-certificates-introducing-onecrl/ ***/
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user_pref("extensions.blocklist.enabled", true); // [DEFAULT: true]
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/** SAFE BROWSING (SB)
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Safe Browsing has taken many steps to preserve privacy. *IF* required, a full url is never
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sent to Google, only a PART-hash of the prefix, and this is hidden with noise of other real
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PART-hashes. Google also swear it is anonymized and only used to flag malicious sites.
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Firefox also takes measures such as striping out identifying parameters and since SBv4 (FF57+)
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doesn't even use cookies. (#Turn on browser.safebrowsing.debug to monitor this activity)
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#Required reading [#] https://feeding.cloud.geek.nz/posts/how-safe-browsing-works-in-firefox/
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[1] https://wiki.mozilla.org/Security/Safe_Browsing
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[2] https://support.mozilla.org/en-US/kb/how-does-phishing-and-malware-protection-work
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***/
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/* 0410: disable SB (Safe Browsing)
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* [WARNING] Do this at your own risk! These are the master switches.
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* [SETTING] Privacy & Security>Security>... "Block dangerous and deceptive content" ***/
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// user_pref("browser.safebrowsing.malware.enabled", false);
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// user_pref("browser.safebrowsing.phishing.enabled", false);
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/* 0411: disable SB checks for downloads (both local lookups + remote)
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* This is the master switch for the safebrowsing.downloads* prefs (0412, 0413)
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* [SETTING] Privacy & Security>Security>... "Block dangerous downloads" ***/
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// user_pref("browser.safebrowsing.downloads.enabled", false);
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/* 0412: disable SB checks for downloads (remote)
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* To verify the safety of certain executable files, Firefox may submit some information about the
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* file, including the name, origin, size and a cryptographic hash of the contents, to the Google
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* Safe Browsing service which helps Firefox determine whether or not the file should be blocked
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* [SETUP-SECURITY] If you do not understand this, or you want this protection, then override it ***/
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user_pref("browser.safebrowsing.downloads.remote.enabled", false);
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user_pref("browser.safebrowsing.downloads.remote.url", "");
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/* 0413: disable SB checks for unwanted software
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* [SETTING] Privacy & Security>Security>... "Warn you about unwanted and uncommon software" ***/
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// user_pref("browser.safebrowsing.downloads.remote.block_potentially_unwanted", false);
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// user_pref("browser.safebrowsing.downloads.remote.block_uncommon", false);
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/* 0419: disable 'ignore this warning' on SB warnings
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* If clicked, it bypasses the block for that session. This is a means for admins to enforce SB
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* [TEST] see github wiki APPENDIX A: Test Sites: Section 5
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* [1] https://bugzilla.mozilla.org/1226490 ***/
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// user_pref("browser.safebrowsing.allowOverride", false);
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/*** [SECTION 0500]: SYSTEM ADD-ONS / EXPERIMENTS
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System Add-ons are a method for shipping extensions, considered to be
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built-in features to Firefox, that are hidden from the about:addons UI.
|
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To view your System Add-ons go to about:support, they are listed under "Firefox Features"
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Some System Add-ons have no on-off prefs. Instead you can manually remove them. Note that app
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updates will restore them. They may also be updated and possibly restored automatically (see 0505)
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* Portable: "...\App\Firefox64\browser\features\" (or "App\Firefox\etc" for 32bit)
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* Windows: "...\Program Files\Mozilla\browser\features" (or "Program Files (X86)\etc" for 32bit)
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* Mac: "...\Applications\Firefox\Contents\Resources\browser\features\"
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[NOTE] On Mac you can right-click on the application and select "Show Package Contents"
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* Linux: "/usr/lib/firefox/browser/features" (or similar)
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[1] https://firefox-source-docs.mozilla.org/toolkit/mozapps/extensions/addon-manager/SystemAddons.html
|
|
[2] https://dxr.mozilla.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);
|
|
/* 0515: disable Screenshots ***/
|
|
// user_pref("extensions.screenshots.disabled", true); // [FF55+]
|
|
/* 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
|
|
* [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.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://developer.mozilla.org/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control ***/
|
|
user_pref("network.dns.disablePrefetch", true);
|
|
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 ***/
|
|
user_pref("network.http.speculative-parallel-limit", 0);
|
|
/* 0606: 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); // defense-in-depth
|
|
|
|
/*** [SECTION 0700]: HTTP* / TCP/IP / DNS / PROXY / SOCKS etc ***/
|
|
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 they do not play nice with VPNs. That's
|
|
* even assuming your ISP and/or router and/or website can handle it. Sites will fall back to IPv4
|
|
* [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
|
|
* 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.
|
|
* [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) ***/
|
|
user_pref("network.dns.disableIPv6", true);
|
|
/* 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
|
|
* 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+] ***/
|
|
// user_pref("network.ftp.enabled", false);
|
|
/* 0709: 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
|
|
* 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) ***/
|
|
user_pref("network.gio.supported-protocols", ""); // [HIDDEN PREF]
|
|
|
|
/*** [SECTION 0800]: LOCATION BAR / SEARCH BAR / SUGGESTIONS / HISTORY / FORMS
|
|
Change items 0850 and above to suit for privacy vs convenience and functionality. Consider
|
|
your environment (no unwanted eyeballs), your device (restricted access), your device's
|
|
unattended state (locked, encrypted, forensic hardened). Likewise, you may want to check
|
|
the items cleared on shutdown in section 2800.
|
|
[NOTE] The urlbar is also commonly referred to as the location bar and address bar
|
|
#Required reading [#] https://xkcd.com/538/
|
|
***/
|
|
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);
|
|
/* 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
|
|
* via Proxy Servers (different error), is a flawed use of DNS (TLDs: why treat .com
|
|
* as the 411 for DNS errors?), privacy issues (why connect to sites you didn't
|
|
* 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);
|
|
/* 0803: display all parts of the url in the location bar ***/
|
|
user_pref("browser.urlbar.trimURLs", 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 ***/
|
|
user_pref("browser.search.suggest.enabled", false);
|
|
user_pref("browser.urlbar.suggest.searches", false);
|
|
/* 0810: disable location bar making speculative connections [FF56+]
|
|
* [1] https://bugzilla.mozilla.org/1348275 ***/
|
|
user_pref("browser.urlbar.speculativeConnect.enabled", false);
|
|
/* 0811: disable location bar leaking single words to a DNS provider **after searching** [FF78+]
|
|
* 0=never resolve single words, 1=heuristic (default), 2=always resolve
|
|
* [NOTE] For FF78 value 1 and 2 are the same and always resolve but that will change in future versions
|
|
* [1] https://bugzilla.mozilla.org/1642623 ***/
|
|
user_pref("browser.urlbar.dnsResolveSingleWordsAfterSearch", 0);
|
|
/* 0850a: disable location bar suggestion types
|
|
* [SETTING] Privacy & Security>Address Bar>When using the address bar, suggest ***/
|
|
// user_pref("browser.urlbar.suggest.history", false);
|
|
// user_pref("browser.urlbar.suggest.bookmark", false);
|
|
// user_pref("browser.urlbar.suggest.openpage", false);
|
|
// user_pref("browser.urlbar.suggest.topsites", false); // [FF78+]
|
|
/* 0850c: disable location bar dropdown
|
|
* This value controls the total number of entries to appear in the location bar dropdown
|
|
* [NOTE] Items (bookmarks/history/openpages) with a high "frecency"/"bonus" will always
|
|
* be displayed (no we do not know how these are calculated or what the threshold is),
|
|
* and this does not affect the search by search engine suggestion (see 0807)
|
|
* [NOTE] This setting is only useful if you want to enable search engine keywords
|
|
* (i.e. at least one of 0850a suggestion types must be true) but you want to *limit* suggestions shown ***/
|
|
// user_pref("browser.urlbar.maxRichResults", 0);
|
|
/* 0850d: disable location bar autofill
|
|
* [1] https://support.mozilla.org/en-US/kb/address-bar-autocomplete-firefox#w_url-autocomplete ***/
|
|
// user_pref("browser.urlbar.autoFill", false);
|
|
/* 0860: disable search and form history
|
|
* [SETUP-WEB] Be aware that 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
|
|
* [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);
|
|
/* 0870: disable Windows jumplist [WINDOWS] ***/
|
|
user_pref("browser.taskbar.lists.enabled", false);
|
|
user_pref("browser.taskbar.lists.frequent.enabled", false);
|
|
user_pref("browser.taskbar.lists.recent.enabled", false);
|
|
user_pref("browser.taskbar.lists.tasks.enabled", false);
|
|
/* 0871: disable Windows taskbar preview [WINDOWS] ***/
|
|
user_pref("browser.taskbar.previews.enable", false);
|
|
|
|
/*** [SECTION 0900]: PASSWORDS ***/
|
|
user_pref("_user.js.parrot", "0900 syntax error: the parrot's expired!");
|
|
/* 0901: disable saving passwords
|
|
* [NOTE] This does not clear any passwords already saved
|
|
* [SETTING] Privacy & Security>Logins and Passwords>Ask to save logins and passwords for websites ***/
|
|
// user_pref("signon.rememberSignons", false);
|
|
/* 0902: use a primary password
|
|
* There are no preferences for this. It is all handled internally.
|
|
* [SETTING] Privacy & Security>Logins and Passwords>Use a Primary Password
|
|
* [1] https://support.mozilla.org/kb/use-primary-password-protect-stored-logins-and-pas ***/
|
|
/* 0903: set how often Firefox should ask for the primary password
|
|
* 0=the first time (default), 1=every time it's needed, 2=every n minutes (see 0904) ***/
|
|
user_pref("security.ask_for_password", 2);
|
|
/* 0904: set how often in minutes Firefox should ask for the primary password (see 0903)
|
|
* in minutes, default is 30 ***/
|
|
user_pref("security.password_lifetime", 5);
|
|
/* 0905: 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
|
|
* [SETTING] Privacy & Security>Logins and Passwords>Autofill logins and passwords
|
|
* [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);
|
|
/* 0909: disable formless login capture for Password Manager [FF51+] ***/
|
|
user_pref("signon.formlessCapture.enabled", false);
|
|
/* 0912: 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);
|
|
|
|
/*** [SECTION 1000]: CACHE / SESSION (RE)STORE / 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/arkenfox/user.js/wiki/4.2.4-Header-Editor
|
|
***/
|
|
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 kibibytes ***/
|
|
// user_pref("browser.cache.memory.enable", false);
|
|
// user_pref("browser.cache.memory.capacity", 0);
|
|
/* 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]
|
|
/* 1007: 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);
|
|
|
|
/** SESSIONS & SESSION RESTORE ***/
|
|
/* 1020: exclude "Undo Closed Tabs" in Session Restore ***/
|
|
// user_pref("browser.sessionstore.max_tabs_undo", 0);
|
|
/* 1021: disable storing extra session data [SETUP-CHROME]
|
|
* extra session data contains contents of forms, scrollbar positions, cookies and POST data
|
|
* define on which sites to save extra session data:
|
|
* 0=everywhere, 1=unencrypted sites, 2=nowhere ***/
|
|
user_pref("browser.sessionstore.privacy_level", 2);
|
|
/* 1022: disable resuming session from crash ***/
|
|
// user_pref("browser.sessionstore.resume_from_crash", false);
|
|
/* 1023: set the minimum interval between session save operations
|
|
* Increasing this can help on older machines and some websites, as well as reducing writes, see [1]
|
|
* Default is 15000 (15 secs). Try 30000 (30 secs), 60000 (1 min) etc
|
|
* [SETUP-CHROME] This can also affect entries in the "Recently Closed Tabs" feature:
|
|
* i.e. the longer the interval the more chance a quick tab open/close won't be captured.
|
|
* This longer interval *may* affect history but we cannot replicate any history not recorded
|
|
* [1] https://bugzilla.mozilla.org/1304389 ***/
|
|
user_pref("browser.sessionstore.interval", 30000);
|
|
/* 1024: disable automatic Firefox start and session restore after reboot [FF62+] [WINDOWS]
|
|
* [1] https://bugzilla.mozilla.org/603903 ***/
|
|
user_pref("toolkit.winRegisterApplicationRestart", false);
|
|
|
|
/** FAVICONS ***/
|
|
/* 1030: 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.
|
|
* 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)
|
|
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
|
|
[TEST] https://ja3er.com/
|
|
[1] https://www.securityartwork.es/2017/02/02/tls-client-fingerprinting-with-bro/
|
|
***/
|
|
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
|
|
* no unsafe renegotiations on the channel between the browser and the server.
|
|
* [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 ***/
|
|
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]
|
|
// user_pref("security.tls.version.max", 4);
|
|
/* 1203: enforce TLS 1.0 and 1.1 downgrades as session only */
|
|
user_pref("security.tls.version.enable-deprecated", false);
|
|
/* 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]
|
|
/* 1205: disable SSL Error Reporting
|
|
* [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", "");
|
|
/* 1206: 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)
|
|
* 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
|
|
* [1] https://en.wikipedia.org/wiki/Ocsp ***/
|
|
user_pref("security.OCSP.enabled", 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)
|
|
* It is pointless to soft-fail when an OCSP fetch fails: you cannot confirm a cert is still valid (it
|
|
* could have been revoked) and/or you could be under attack (e.g. malicious blocking of OCSP servers)
|
|
* [1] https://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox/
|
|
* [2] https://www.imperialviolet.org/2014/04/19/revchecking.html ***/
|
|
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.
|
|
* [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]
|
|
* 0=disable detecting Family Safety mode and importing the root
|
|
* 1=only attempt to detect Family Safety mode (don't import the root)
|
|
* 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-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);
|
|
|
|
/** MIXED CONTENT ***/
|
|
/* 1240: enforce no 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);
|
|
/* 1244: enable HTTPS-Only mode [FF76+]
|
|
* When "https_only_mode" (all windows) is true, "https_only_mode_pbm" (private windows only) is ignored
|
|
* [WARNING] This is experimental [1] and you can't set exceptions if FPI is enabled [2] (fixed in FF83)
|
|
* [SETTING] to add site exceptions: Page Info>Permissions>Use insecure HTTP (FF80+)
|
|
* [SETTING] Privacy & Security>HTTPS-Only Mode (FF80+ with browser.preferences.exposeHTTPSOnly = true)
|
|
* [1] https://bugzilla.mozilla.org/1613063 [META]
|
|
* [2] https://bugzilla.mozilla.org/1647829 ***/
|
|
// user_pref("dom.security.https_only_mode", true); // [FF76+]
|
|
// user_pref("dom.security.https_only_mode_pbm", true); // [FF80+]
|
|
// user_pref("dom.security.https_only_mode.upgrade_local", true); // [FF77+]
|
|
|
|
/** 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);
|
|
/* 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
|
|
|
|
/** 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/ ***/
|
|
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/)
|
|
* [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]
|
|
user_pref("security.insecure_connection_text.enabled", true); // [FF60+]
|
|
|
|
/*** [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
|
|
* [WARNING] **DO NOT USE**: in FF80+ RFP covers this, and non-RFP users should use font vis (4618)
|
|
* [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 ***/
|
|
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);
|
|
/* 1409: limit system font exposure to a whitelist [FF52+] [RESTART]
|
|
* If the whitelist is empty, then whitelisting is considered disabled and all fonts are allowed
|
|
* [WARNING] **DO NOT USE**: in FF80+ RFP covers this, and non-RFP users should use font vis (4618)
|
|
* [NOTE] In FF81+ the whitelist **overrides** RFP's font visibility (see 4618)
|
|
* [1] https://bugzilla.mozilla.org/1121643 ***/
|
|
// user_pref("font.system.whitelist", ""); // [HIDDEN PREF]
|
|
|
|
/*** [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
|
|
---
|
|
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/
|
|
***/
|
|
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", 2); // [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
|
|
* 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 ***/
|
|
user_pref("network.http.referer.XOriginPolicy", 1);
|
|
/* 1604: CROSS ORIGIN: control the amount of 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", 3); // [DEFAULT: 3]
|
|
// user_pref("network.http.referer.defaultPolicy.pbmode", 2); // [DEFAULT: 2]
|
|
/* 1607: TOR: hide (not spoof) referrer when leaving a .onion domain [FF54+]
|
|
* [NOTE] Firefox cannot access .onion sites by default. We recommend you use
|
|
* the Tor Browser which is specifically designed for hidden services
|
|
* [1] https://bugzilla.mozilla.org/1305144 ***/
|
|
user_pref("network.http.referer.hideOnionSource", true);
|
|
/* 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("privacy.donottrackheader.enabled", true);
|
|
|
|
/*** [SECTION 1700]: CONTAINERS
|
|
If you want to *really* leverage containers, we highly recommend Temporary Containers [2].
|
|
Read the article by the extension author [3], and check out the github 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 setting in preferences (see 1702) [FF50+]
|
|
* [1] https://bugzilla.mozilla.org/1279029 ***/
|
|
user_pref("privacy.userContext.ui.enabled", true);
|
|
/* 1702: enable Container Tabs [FF50+]
|
|
* [SETTING] General>Tabs>Enable Container Tabs ***/
|
|
user_pref("privacy.userContext.enabled", true);
|
|
/* 1703: 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
|
|
* [SETTING] General>Tabs>Enable Container Tabs>Settings>Select a container for each new tab ***/
|
|
// user_pref("privacy.userContext.newTabContainerOnLeftClick.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 2000]: MEDIA / CAMERA / MIC ***/
|
|
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
|
|
* in your threat model, and you want Real-Time Communication, this is the pref for you
|
|
* [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]
|
|
* [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
|
|
* [3] https://tools.ietf.org/html/draft-ietf-rtcweb-ip-handling-12#section-5.2 ***/
|
|
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);
|
|
/* 2024: set a default permission for Camera/Microphone [FF58+]
|
|
* 0=always ask (default), 1=allow, 2=block
|
|
* [SETTING] to add site exceptions: Page Info>Permissions>Use the Camera/Microphone
|
|
* [SETTING] to manage site exceptions: Options>Privacy & Security>Permissions>Camera/Microphone>Settings ***/
|
|
// user_pref("permissions.default.camera", 2);
|
|
// user_pref("permissions.default.microphone", 2);
|
|
/* 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);
|
|
/* 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 ***/
|
|
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!");
|
|
/* 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.
|
|
* [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); // 1=most recent window or tab 2=new window, 3=new tab
|
|
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);
|
|
/* 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.
|
|
|
|
[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
|
|
* 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.
|
|
* [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 ***/
|
|
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)
|
|
* [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.
|
|
* [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 ***/
|
|
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 ***/
|
|
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 ***/
|
|
// 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 [1]
|
|
* [1] 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 ***/
|
|
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
|
|
* [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);
|
|
// user_pref("javascript.options.jit_trustedprincipals", true); // [FF75+] [HIDDEN PREF]
|
|
/* 2422: disable WebAssembly [FF52+] [SETUP-PERF]
|
|
* [1] https://developer.mozilla.org/docs/WebAssembly ***/
|
|
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 ***/
|
|
user_pref("dom.targetBlankNoOpener.enabled", true); // [DEFAULT: true FF79+]
|
|
|
|
/*** [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]
|
|
* [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)
|
|
* [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
|
|
* [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+]
|
|
* [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
|
|
* [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
|
|
* [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 ***/
|
|
// user_pref("permissions.default.xr", 0);
|
|
|
|
/*** [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]
|
|
* [SETTING] Privacy & Security>Permissions>Prevent accessibility services from accessing your browser (FF80 or lower)
|
|
* [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
|
|
* look in profile/thumbnails directory - you may want to clean that out ***/
|
|
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: 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]
|
|
* [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+]
|
|
* [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", 10);
|
|
/* 2615: disable websites overriding Firefox's keyboard shortcuts [FF58+]
|
|
* 0 (default) or 1=allow, 2=block
|
|
* [SETTING] to add site exceptions: Page Info>Permissions>Override Keyboard Shortcuts ***/
|
|
// user_pref("permissions.default.shortcuts", 2);
|
|
/* 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: enforce Punycode for Internationalized Domain Names to eliminate possible spoofing
|
|
* Firefox has *some* protections, but it is better to be safe than sorry
|
|
* [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/
|
|
* [4] https://www.xudongz.com/blog/2017/idn-phishing/ ***/
|
|
user_pref("network.IDN_show_punycode", true);
|
|
/* 2620: enforce Firefox's built-in PDF reader [SETUP-CHROME]
|
|
* This setting controls if the option "Display in Firefox" 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 as secure/vetted as any pdf reader out there (more than most)
|
|
* Exploits are rare (1 serious case in 4 yrs), 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 (rare)
|
|
* [SETTING] General>Applications>Portable Document Format (PDF) ***/
|
|
user_pref("pdfjs.disabled", false); // [DEFAULT: false]
|
|
/* 2621: disable links launching Windows Store on Windows 8/8.1/10 [WINDOWS] ***/
|
|
user_pref("network.protocol-handler.external.ms-windows-store", false);
|
|
/* 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]
|
|
/* 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 ***/
|
|
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", 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 :
|
|
|
|
[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 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 and social media trackers (default)
|
|
* [NOTE] You can set exceptions under site permissions or use an extension
|
|
* [NOTE] Enforcing category to custom ensures ETP related prefs are always honored
|
|
* [SETTING] Privacy & Security>Enhanced Tracking Protection>Custom>Cookies ***/
|
|
user_pref("network.cookie.cookieBehavior", 1);
|
|
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 Firefox
|
|
* [NOTE] The setting below is disabled (but not changed) if you block all cookies (2701 = 2)
|
|
* [SETTING] Privacy & Security>Cookies and Site Data>Delete cookies and site data when Firefox is closed ***/
|
|
// 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);
|
|
/* 2740: disable service worker cache and cache storage
|
|
* [NOTE] We clear service worker cache on exiting Firefox (see 2803)
|
|
* [1] https://w3c.github.io/ServiceWorker/#privacy ***/
|
|
// user_pref("dom.caches.enabled", false);
|
|
/* 2750: disable Storage API [FF51+]
|
|
* The API gives sites the ability to find out how much space they can use, how much
|
|
* they are already using, and even control whether or not they need to be alerted
|
|
* before the user agent disposes of site data in order to make room for other things.
|
|
* [1] https://developer.mozilla.org/docs/Web/API/StorageManager
|
|
* [2] https://developer.mozilla.org/docs/Web/API/Storage_API
|
|
* [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);
|
|
|
|
/*** [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
|
|
***/
|
|
user_pref("_user.js.parrot", "2800 syntax error: the parrot's bleedin' demised!");
|
|
/* 2802: enable Firefox to clear items on shutdown (see 2803)
|
|
* [SETTING] Privacy & Security>History>Custom Settings>Clear history when Firefox closes ***/
|
|
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
|
|
* [SETTING] Privacy & Security>History>Custom Settings>Clear history when Firefox closes>Settings ***/
|
|
user_pref("privacy.clearOnShutdown.cache", true);
|
|
user_pref("privacy.clearOnShutdown.cookies", true);
|
|
user_pref("privacy.clearOnShutdown.downloads", true); // see note above
|
|
user_pref("privacy.clearOnShutdown.formdata", true); // Form & Search History
|
|
user_pref("privacy.clearOnShutdown.history", true); // Browsing & Download History
|
|
user_pref("privacy.clearOnShutdown.offlineApps", true); // Offline Website Data
|
|
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' ***/
|
|
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
|
|
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 (see 0102) or is already cleared with history (see 2803)
|
|
* [NOTE] privacy.clearOnShutdown.openWindows prevents resuming from crashes (see 1022)
|
|
* [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' (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.sanitize.timeSpan", 0);
|
|
|
|
/*** [SECTION 4000]: FPI (FIRST PARTY ISOLATION)
|
|
4001: FPI
|
|
** 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+)
|
|
4003: NETWORK PARTITON
|
|
** 1647732 - isolate font cache (FF80+)
|
|
** 1649673 - isolate speculative connections (FF80+)
|
|
***/
|
|
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
|
|
* [2] https://bugzilla.mozilla.org/1299996 [META] ***/
|
|
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
|
|
* 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.
|
|
* [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 ***/
|
|
// user_pref("privacy.firstparty.isolate.restrict_opener_access", true); // [DEFAULT: true]
|
|
// user_pref("privacy.firstparty.isolate.block_post_message", true);
|
|
/* 4003: enable site partitioning (FF78+)
|
|
* [1] https://bugzilla.mozilla.org/1590107 [META] */
|
|
user_pref("privacy.partition.network_state", true);
|
|
|
|
/*** [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
|
|
|
|
[WARNING] Do NOT use extensions to alter RFP protected metrics
|
|
[WARNING] Do NOT use prefs in section 4600 with RFP as they can interfere
|
|
|
|
FF41+
|
|
418986 - limit window.screen & CSS media queries leaking identifiable info
|
|
[TEST] https://arkenfox.github.io/TZP/tzp.html#screen
|
|
FF50+
|
|
1281949 - spoof screen orientation
|
|
1281963 - hide the contents of navigator.plugins and navigator.mimeTypes (FF50+)
|
|
FF55+
|
|
1330890 - spoof timezone as UTC 0
|
|
1360039 - spoof navigator.hardwareConcurrency as 2 (see 4601)
|
|
1217238 - reduce precision of time exposed by javascript
|
|
FF56+
|
|
1369303 - spoof/disable performance API (see 4602, 4603)
|
|
1333651 - spoof User Agent & Navigator API (see section 4700)
|
|
JS: FF78+ the version is spoofed as 78, and the OS as Windows 10, OS 10.15, Android 9, or Linux
|
|
HTTP Headers: spoofed as Windows or Android
|
|
1369319 - disable device sensor API (see 4604)
|
|
1369357 - disable site specific zoom (see 4605)
|
|
1337161 - hide gamepads from content (see 4606)
|
|
1372072 - spoof network information API as "unknown" when dom.netinfo.enabled = true (see 4607)
|
|
1333641 - reduce fingerprinting in WebSpeech API (see 4608)
|
|
FF57+
|
|
1369309 - spoof media statistics (see 4610)
|
|
1382499 - reduce screen co-ordinate fingerprinting in Touch API (see 4611)
|
|
1217290 & 1409677 - enable fingerprinting resistance for WebGL (see 2010-12)
|
|
1382545 - reduce fingerprinting in Animation API
|
|
1354633 - limit MediaError.message to a whitelist
|
|
1382533 - enable fingerprinting resistance for Presentation API
|
|
This blocks exposure of local IP Addresses via mDNS (Multicast DNS)
|
|
FF58+
|
|
967895 - spoof canvas and enable site permission prompt before allowing canvas data extraction
|
|
FF59+
|
|
1372073 - spoof/block fingerprinting in MediaDevices API
|
|
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)
|
|
1222285 & 1433592 - spoof keyboard events and suppress keyboard modifier events
|
|
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.
|
|
FF60-67
|
|
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 4614) (FF63+)
|
|
1363508 - spoof/suppress Pointer Events (see 4615) (FF64+)
|
|
FF65: pointerEvent.pointerid (1492766)
|
|
1485266 - disable exposure of system colors to CSS or canvas (see 4616) (FF67+)
|
|
1407366 - enable inner window letterboxing (see 4504) (FF67+)
|
|
1494034 - return "light" with prefers-color-scheme (see 4617) (FF67+)
|
|
FF68-77
|
|
1564422 - spoof audioContext outputLatency (FF70+)
|
|
1595823 - spoof audioContext sampleRate (FF72+)
|
|
1607316 - spoof pointer as coarse and hover as none (ANDROID) (FF74+)
|
|
FF78+
|
|
1621433 - randomize canvas (previously FF58+ returned an all-white canvas) (FF78+)
|
|
1653987 - limit font visibility to bundled and "Base Fonts" (see 4618) (non-ANDROID) (FF80+)
|
|
***/
|
|
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).
|
|
* [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/ ***/
|
|
// user_pref("privacy.window.maxInnerWidth", 1000);
|
|
// user_pref("privacy.window.maxInnerHeight", 1000);
|
|
/* 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]
|
|
/* 4504: enable RFP letterboxing [FF67+]
|
|
* Dynamically resizes the inner window by applying margins in stepped ranges, see [2]
|
|
* If you use the dimension pref, then it will only apply those resolutions. The format is
|
|
* "width1xheight1, width2xheight2, ..." (e.g. "800x600, 1000x1000, 1600x900")
|
|
* [SETUP-WEB] This does NOT require RFP (see 4501) **for now**, so if you're not using 4501, or you are but
|
|
* dislike margins being applied, then flip this pref, keeping in mind that it is effectively fingerprintable
|
|
* [WARNING] The dimension pref is only meant for testing, and we recommend you DO NOT USE it
|
|
* [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]
|
|
/* 4510: disable showing about:blank as soon as possible during startup [FF60+]
|
|
* When default true this no longer masks the RFP chrome resizing activity
|
|
* [1] https://bugzilla.mozilla.org/1448423 ***/
|
|
user_pref("browser.startup.blankWindow", false);
|
|
/* 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]
|
|
|
|
/*** [SECTION 4600]: RFP ALTERNATIVES
|
|
[WARNING] Do NOT use prefs in this section with RFP as they can interfere
|
|
***/
|
|
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("device.sensors.enabled", false);
|
|
// 4605: [2515] disable site specific zoom
|
|
// Zoom levels affect screen res and are highly fingerprintable. This does not stop you using
|
|
// zoom, it will just not use/remember any site specific settings. Zoom levels on new tabs
|
|
// and new windows are reset to default and only the current tab retains the current zoom
|
|
user_pref("browser.zoom.siteSpecific", 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.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.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);
|
|
// * * * /
|
|
// FF63+
|
|
// 4614: enforce prefers-reduced-motion as no-preference [FF63+] [RESTART]
|
|
// 0=no-preference, 1=reduce
|
|
user_pref("ui.prefersReducedMotion", 0); // [HIDDEN PREF]
|
|
// FF64+
|
|
// 4615: [2516] disable PointerEvents
|
|
// [1] https://developer.mozilla.org/en-US/docs/Web/API/PointerEvent
|
|
user_pref("dom.w3c_pointer_events.enabled", false);
|
|
// * * * /
|
|
// FF67+
|
|
// 4616: [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=232227,1330876
|
|
user_pref("ui.use_standins_for_native_colors", true);
|
|
// 4617: enforce prefers-color-scheme as light [FF67+]
|
|
// 0=light, 1=dark : This overrides your OS value
|
|
user_pref("ui.systemUsesDarkTheme", 0); // [HIDDEN PREF]
|
|
// FF80+
|
|
// 4618: limit font visbility (non-ANDROID) [FF79+]
|
|
// Uses hardcoded lists with two parts: kBaseFonts + kLangPackFonts, see [1]
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// 1=only base system fonts, 2=also fonts from optional language packs, 3=also user-installed fonts
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// [NOTE] Bundled fonts are auto-allowed
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// [1] https://searchfox.org/mozilla-central/search?path=StandardFonts*.inc
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user_pref("layout.css.font-visibility.level", 1);
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// * * * /
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// ***/
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/*** [SECTION 4700]: RFP ALTERNATIVES (USER AGENT SPOOFING)
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These prefs are insufficient and leak. Use RFP and **nothing else**
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- Many of the user agent components can be derived by other means. When those
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values differ, you provide more bits and raise entropy. Examples include
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workers, iframes, headers, tcp/ip attributes, feature detection, and many more
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- Web extensions also lack APIs to fully protect spoofing
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***/
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user_pref("_user.js.parrot", "4700 syntax error: the parrot's taken 'is last bow");
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/* 4701: navigator DOM object overrides
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* [WARNING] DO NOT USE ***/
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// user_pref("general.appname.override", ""); // [HIDDEN PREF]
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// user_pref("general.appversion.override", ""); // [HIDDEN PREF]
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// user_pref("general.buildID.override", ""); // [HIDDEN PREF]
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// user_pref("general.oscpu.override", ""); // [HIDDEN PREF]
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// user_pref("general.platform.override", ""); // [HIDDEN PREF]
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// user_pref("general.useragent.override", ""); // [HIDDEN PREF]
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/*** [SECTION 5000]: PERSONAL
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Non-project related but useful. If any of these interest you, add them to your overrides ***/
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user_pref("_user.js.parrot", "5000 syntax error: this is an ex-parrot!");
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/* WELCOME & WHAT's NEW NOTICES ***/
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// user_pref("browser.startup.homepage_override.mstone", "ignore"); // master switch
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// user_pref("startup.homepage_welcome_url", "");
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// user_pref("startup.homepage_welcome_url.additional", "");
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// user_pref("startup.homepage_override_url", ""); // What's New page after updates
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/* WARNINGS ***/
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|
// user_pref("browser.tabs.warnOnClose", false);
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|
// user_pref("browser.tabs.warnOnCloseOtherTabs", false);
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|
// user_pref("browser.tabs.warnOnOpen", false);
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|
// user_pref("full-screen-api.warning.delay", 0);
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// user_pref("full-screen-api.warning.timeout", 0);
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/* APPEARANCE ***/
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|
// user_pref("browser.download.autohideButton", false); // [FF57+]
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// user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true); // [FF68+] allow userChrome/userContent
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|
/* CONTENT BEHAVIOR ***/
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|
// user_pref("accessibility.typeaheadfind", true); // enable "Find As You Type"
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// user_pref("clipboard.autocopy", false); // disable autocopy default [LINUX]
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|
// user_pref("layout.spellcheckDefault", 2); // 0=none, 1-multi-line, 2=multi-line & single-line
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|
/* UX BEHAVIOR ***/
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|
// user_pref("browser.backspace_action", 2); // 0=previous page, 1=scroll up, 2=do nothing
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|
// user_pref("browser.tabs.closeWindowWithLastTab", false);
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|
// user_pref("browser.tabs.loadBookmarksInTabs", true); // open bookmarks in a new tab [FF57+]
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|
// user_pref("browser.urlbar.decodeURLsOnCopy", true); // see bugzilla 1320061 [FF53+]
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// user_pref("general.autoScroll", false); // middle-click enabling auto-scrolling [DEFAULT: false on Linux]
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|
// user_pref("ui.key.menuAccessKey", 0); // disable alt key toggling the menu bar [RESTART]
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|
// user_pref("view_source.tab", false); // view "page/selection source" in a new window [FF68+, FF59 and under]
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|
/* UX FEATURES: disable and hide the icons and menus ***/
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|
// user_pref("browser.messaging-system.whatsNewPanel.enabled", false); // What's New [FF69+]
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|
// user_pref("extensions.pocket.enabled", false); // Pocket Account [FF46+]
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|
// user_pref("identity.fxaccounts.enabled", false); // Firefox Accounts & Sync [FF60+] [RESTART]
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|
// user_pref("reader.parse-on-load.enabled", false); // Reader View
|
|
/* OTHER ***/
|
|
// user_pref("browser.bookmarks.max_backups", 2);
|
|
// user_pref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.addons", false); // disable CFR [FF67+]
|
|
// [SETTING] General>Browsing>Recommend extensions as you browse
|
|
// user_pref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.features", false); // disable CFR [FF67+]
|
|
// [SETTING] General>Browsing>Recommend features as you browse
|
|
// user_pref("network.manage-offline-status", false); // see bugzilla 620472
|
|
// user_pref("xpinstall.signatures.required", false); // enforced extension signing (Nightly/ESR)
|
|
|
|
/*** [SECTION 9999]: DEPRECATED / REMOVED / LEGACY / RENAMED
|
|
Documentation denoted as [-]. Items deprecated in FF78 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/arkenfox/user.js/issues/123
|
|
***/
|
|
user_pref("_user.js.parrot", "9999 syntax error: the parrot's deprecated!");
|
|
/* ESR78.x still uses all the following prefs
|
|
// [NOTE] replace the * with a slash in the line above to re-enable them
|
|
// 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", "");
|
|
// * * * /
|
|
// ***/
|
|
|
|
/* END: internal custom pref to test for syntax errors ***/
|
|
user_pref("_user.js.parrot", "SUCCESS: No no he's not dead, he's, he's restin'!");
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