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- /******
- * name: ghacks user.js
- * date: 15 April 2019
- * version 66: The Power of Pants
- * "The power of pants is a curious thing. Make a one man weep, make another man sing"
- * authors: v52+ github | v51- www.ghacks.net
- * url: https://github.com/ghacksuserjs/ghacks-user.js
- * license: MIT: https://github.com/ghacksuserjs/ghacks-user.js/blob/master/LICENSE.txt
- * releases: These are end-of-stable-life-cycle legacy archives.
- *Always* use the master branch user.js for a current up-to-date version.
- url: https://github.com/ghacksuserjs/ghacks-user.js/releases
- * README:
- 0. Consider using Tor Browser if it meets your needs or fits your threat model better
- * https://www.torproject.org/about/torusers.html.en
- 1. READ the full README
- * https://github.com/ghacksuserjs/ghacks-user.js/blob/master/README.md
- 2. READ this
- * https://github.com/ghacksuserjs/ghacks-user.js/wiki/1.3-Implementation
- 3. If you skipped steps 1 and 2 above (shame on you), then here is the absolute minimum
- * Auto-installing updates for Firefox and extensions are disabled (section 0302's)
- * Some user data is erased on close (section 2800). Change this to suit your needs
- * EACH RELEASE check:
- - 4600s: reset prefs made redundant due to privacy.resistFingerprinting (RPF)
- or enable them as an alternative to RFP or for ESR users
- - 9999s: reset deprecated prefs in about:config or enable relevant section(s) for ESR
- * Site breakage WILL happen
- - There are often trade-offs and conflicts between Security vs Privacy vs Anti-Fingerprinting
- and these need to be balanced against Functionality & Convenience & Breakage
- * You will need to make changes, and to troubleshoot at times (choose wisely, there is always a trade-off).
- While not 100% definitive, search for "[SETUP". If required, add each pref to your overrides section at
- default values (or comment them out and reset them in about:config). Here are the main ones:
- [SETUP-WEB] can cause some websites to break
- [SETUP-CHROME] changes how Firefox itself behaves (i.e. NOT directly website related)
- [SETUP-PERF] may impact performance
- * [WARNING] tags are extra special and used sparingly, so heed them
- 4. BACKUP your profile folder before implementing (and/or test in a new/cloned profile)
- 5. KEEP UP TO DATE: https://github.com/ghacksuserjs/ghacks-user.js/wiki#small_orange_diamond-maintenance
- * INDEX:
- 0100: STARTUP
- 0200: GEOLOCATION
- 0300: QUIET FOX
- 0400: BLOCKLISTS / SAFE BROWSING / TRACKING PROTECTION
- 0500: SYSTEM ADD-ONS / EXPERIMENTS
- 0600: BLOCK IMPLICIT OUTBOUND
- 0700: HTTP* / TCP/IP / DNS / PROXY / SOCKS etc
- 0800: LOCATION BAR / SEARCH BAR / SUGGESTIONS / HISTORY / FORMS
- 0900: PASSWORDS
- 1000: CACHE / SESSION (RE)STORE / FAVICONS
- 1200: HTTPS (SSL/TLS / OCSP / CERTS / HPKP / CIPHERS)
- 1400: FONTS
- 1600: HEADERS / REFERERS
- 1700: CONTAINERS
- 1800: PLUGINS
- 2000: MEDIA / CAMERA / MIC
- 2200: WINDOW MEDDLING & LEAKS / POPUPS
- 2300: WEB WORKERS
- 2400: DOM (DOCUMENT OBJECT MODEL) & JAVASCRIPT
- 2500: HARDWARE FINGERPRINTING
- 2600: MISCELLANEOUS
- 2700: PERSISTENT STORAGE
- 2800: SHUTDOWN
- 4000: FPI (FIRST PARTY ISOLATION)
- 4500: RFP (RESIST FINGERPRINTING)
- 4600: RFP ALTERNATIVES
- 4700: RFP ALTERNATIVES (NAVIGATOR / USER AGENT (UA) SPOOFING)
- 5000: PERSONAL
- 9999: DEPRECATED / REMOVED / LEGACY / RENAMED
- ******/
- /* START: internal custom pref to test for syntax errors
- * [NOTE] In FF60+, not all syntax errors cause parsing to abort i.e. reaching the last debug
- * pref no longer necessarily means that all prefs have been applied. Check the console right
- * after startup for any warnings/error messages related to non-applied prefs
- * [1] https://blog.mozilla.org/nnethercote/2018/03/09/a-new-preferences-parser-for-firefox/ ***/
- user_pref("_user.js.parrot", "START: Oh yes, the Norwegian Blue... what's wrong with it?");
- /*** [SECTION 0100]: STARTUP ***/
- user_pref("_user.js.parrot", "0100 syntax error: the parrot's dead!");
- /* 0101: disable default browser check
- * [SETTING] General>Startup>Always check if Firefox is your default browser ***/
- user_pref("browser.shell.checkDefaultBrowser", false);
- /* 0102: set START page (0=blank, 1=home, 2=last visited page, 3=resume previous session)
- * [NOTE] Session Restore is not used in PB mode (0110) and is cleared with history (2803, 2804)
- * [SETTING] General>Startup>Restore previous session ***/
- user_pref("browser.startup.page", 0);
- /* 0103: set HOME+NEWWINDOW page
- * about:home=Activity Stream (default, see 0105), custom URL, about:blank
- * [SETTING] Home>New Windows and Tabs>Homepage and new windows ***/
- user_pref("browser.startup.homepage", "about:blank");
- /* 0104: set NEWTAB page
- * true=Activity Stream (default, see 0105), false=blank page
- * [SETTING] Home>New Windows and Tabs>New tabs ***/
- user_pref("browser.newtabpage.enabled", false);
- user_pref("browser.newtab.preload", false);
- /* 0105: disable Activity Stream stuff (AS)
- * AS is the default homepage/newtab in FF57+, based on metadata and browsing behavior.
- * **NOT LISTING ALL OF THESE: USE THE PREFERENCES UI**
- * [SETTING] Home>Firefox Home Content>... to show/hide what you want ***/
- /* 0105a: disable Activity Stream telemetry ***/
- user_pref("browser.newtabpage.activity-stream.feeds.telemetry", false);
- user_pref("browser.newtabpage.activity-stream.telemetry", false);
- user_pref("browser.newtabpage.activity-stream.telemetry.ping.endpoint", "");
- /* 0105b: disable Activity Stream Snippets
- * Runs code received from a server (aka Remote Code Execution) and sends information back to a metrics server
- * [1] https://abouthome-snippets-service.readthedocs.io/ ***/
- user_pref("browser.aboutHomeSnippets.updateUrl", "");
- user_pref("browser.newtabpage.activity-stream.asrouter.providers.snippets", "");
- user_pref("browser.newtabpage.activity-stream.disableSnippets", true);
- user_pref("browser.newtabpage.activity-stream.feeds.snippets", false);
- /* 0105c: disable Activity Stream Top Stories, Pocket-based and/or sponsored content ***/
- user_pref("browser.newtabpage.activity-stream.feeds.section.topstories", false);
- user_pref("browser.newtabpage.activity-stream.section.highlights.includePocket", false);
- user_pref("browser.newtabpage.activity-stream.showSponsored", false);
- user_pref("browser.newtabpage.activity-stream.feeds.discoverystreamfeed", false); // [FF66+]
- /* 0105d: disable Activity Stream recent Highlights in the Library [FF57+] ***/
- // user_pref("browser.library.activity-stream.enabled", false);
- /* 0110: start Firefox in PB (Private Browsing) mode
- * [NOTE] In this mode *all* windows are "private windows" and the PB mode icon is not displayed
- * [WARNING] The P in PB mode is misleading: it means no "persistent" local storage of history,
- * caches, searches or cookies (which you can achieve in normal mode). In fact, it limits or
- * removes the ability to control these, and you need to quit Firefox to clear them. PB is best
- * used as a one off window (File>New Private Window) to provide a temporary self-contained
- * new instance. Closing all Private Windows clears all traces. Repeat as required. PB also does
- * not allow indexedDB which breaks many Extensions that use it including uBlock Origin and uMatrix
- * [SETTING] Privacy & Security>History>Custom Settings>Always use private browsing mode
- * [1] https://wiki.mozilla.org/Private_Browsing
- * [2] https://spreadprivacy.com/is-private-browsing-really-private/ ***/
- // user_pref("browser.privatebrowsing.autostart", true);
- /*** [SECTION 0200]: GEOLOCATION ***/
- user_pref("_user.js.parrot", "0200 syntax error: the parrot's definitely deceased!");
- /* 0201: disable Location-Aware Browsing
- * [1] https://www.mozilla.org/firefox/geolocation/ ***/
- // user_pref("geo.enabled", false);
- /* 0201b: set a default permission for Location [FF58+]
- * 0=always ask (default), 1=allow, 2=block
- * [NOTE] Best left at default "always ask", fingerprintable via Permissions API
- * [SETTING] to add site exceptions: Page Info>Permissions>Access Your Location
- * [SETTING] to manage site exceptions: Options>Privacy & Security>Permissions>Location>Settings ***/
- // user_pref("permissions.default.geo", 2);
- /* 0202: disable GeoIP-based search results
- * [NOTE] May not be hidden if Firefox has changed your settings due to your locale
- * [1] https://trac.torproject.org/projects/tor/ticket/16254
- * [2] https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_geolocation-for-default-search-engine ***/
- user_pref("browser.search.region", "US"); // [HIDDEN PREF]
- user_pref("browser.search.geoip.url", "");
- /* 0205: set OS & APP locale [FF59+]
- * If set to empty, the OS locales are used. If not set at all, default locale is used ***/
- user_pref("intl.locale.requested", "en-US"); // [HIDDEN PREF]
- /* 0206: disable geographically specific results/search engines e.g. "browser.search.*.US"
- * i.e. ignore all of Mozilla's various search engines in multiple locales ***/
- user_pref("browser.search.geoSpecificDefaults", false);
- user_pref("browser.search.geoSpecificDefaults.url", "");
- /* 0207: set language to match ***/
- user_pref("intl.accept_languages", "en-US, en");
- /* 0208: enforce US English locale regardless of the system locale
- * [1] https://bugzilla.mozilla.org/867501 ***/
- user_pref("javascript.use_us_english_locale", true); // [HIDDEN PREF]
- /* 0209: use APP locale over OS locale in regional preferences [FF56+]
- * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1379420,1364789 ***/
- user_pref("intl.regional_prefs.use_os_locales", false);
- /* 0210: use Mozilla geolocation service instead of Google when geolocation is enabled
- * Optionally enable logging to the console (defaults to false) ***/
- user_pref("geo.wifi.uri", "https://location.services.mozilla.com/v1/geolocate?key=%MOZILLA_API_KEY%");
- // user_pref("geo.wifi.logging.enabled", true); // [HIDDEN PREF]
- /* 0211: disable using the OS's geolocation service ***/
- user_pref("geo.provider.ms-windows-location", false); // [WINDOWS]
- user_pref("geo.provider.use_corelocation", false); // [MAC]
- user_pref("geo.provider.use_gpsd", false); // [LINUX]
- /*** [SECTION 0300]: QUIET FOX
- We choose to not disable auto-CHECKs (0301's) but to disable auto-INSTALLs (0302's).
- There are many legitimate reasons to turn off auto-INSTALLS, including hijacked or
- monetized extensions, time constraints, legacy issues, and fear of breakage/bugs.
- It is still important to do updates for security reasons, please do so manually. ***/
- user_pref("_user.js.parrot", "0300 syntax error: the parrot's not pinin' for the fjords!");
- /* 0301b: disable auto-CHECKING for extension and theme updates ***/
- // user_pref("extensions.update.enabled", false);
- /* 0302a: disable auto-INSTALLING Firefox updates [NON-WINDOWS FF65+]
- * [NOTE] In FF65+ on Windows this SETTING (below) is now stored in a file and the pref was removed
- * [SETTING] General>Firefox Updates>Check for updates but let you choose... ***/
- user_pref("app.update.auto", false);
- /* 0302b: disable auto-INSTALLING extension and theme updates (after the check in 0301b)
- * [SETTING] about:addons>Extensions>[cog-wheel-icon]>Update Add-ons Automatically (toggle) ***/
- user_pref("extensions.update.autoUpdateDefault", false);
- /* 0303: disable background update service [WINDOWS]
- * [SETTING] General>Firefox Updates>Use a background service to install updates ***/
- user_pref("app.update.service.enabled", false);
- /* 0304: disable background update staging ***/
- user_pref("app.update.staging.enabled", false);
- /* 0305: enforce update information is displayed
- * This is the update available, downloaded, error and success information ***/
- user_pref("app.update.silent", false);
- /* 0306: disable extension metadata
- * used when installing/updating an extension, and in daily background update checks: if false, it
- * hides the expanded text description (if it exists) when you "show more details about an addon" ***/
- // user_pref("extensions.getAddons.cache.enabled", false);
- /* 0307: disable auto updating of lightweight themes (LWT)
- * Not to be confused with themes in 0301* + 0302*, which use the FF55+ Theme API
- * Mozilla plan to convert existing LWTs and remove LWT support in the future, see [1]
- * [1] https://blog.mozilla.org/addons/2018/09/20/future-themes-here/ ***/
- user_pref("lightweightThemes.update.enabled", false);
- /* 0308: disable search update
- * [SETTING] General>Firefox Updates>Automatically update search engines ***/
- user_pref("browser.search.update", false);
- /* 0309: disable sending Flash crash reports ***/
- user_pref("dom.ipc.plugins.flash.subprocess.crashreporter.enabled", false);
- /* 0310: disable sending the URL of the website where a plugin crashed ***/
- user_pref("dom.ipc.plugins.reportCrashURL", false);
- /* 0320: disable about:addons' Get Add-ons panel (uses Google Analytics) ***/
- user_pref("extensions.getAddons.showPane", false); // [HIDDEN PREF]
- user_pref("extensions.webservice.discoverURL", "");
- /* 0330: disable telemetry
- * the pref (.unified) affects the behaviour of the pref (.enabled)
- * IF unified=false then .enabled controls the telemetry module
- * IF unified=true then .enabled ONLY controls whether to record extended data
- * so make sure to have both set as false
- * [NOTE] FF58+ `toolkit.telemetry.enabled` is now LOCKED to reflect prerelease
- * or release builds (true and false respectively), see [2]
- * [1] https://firefox-source-docs.mozilla.org/toolkit/components/telemetry/telemetry/internals/preferences.html
- * [2] https://medium.com/georg-fritzsche/data-preference-changes-in-firefox-58-2d5df9c428b5 ***/
- user_pref("toolkit.telemetry.unified", false);
- user_pref("toolkit.telemetry.enabled", false); // see [NOTE] above FF58+
- user_pref("toolkit.telemetry.server", "data:,");
- user_pref("toolkit.telemetry.archive.enabled", false);
- user_pref("toolkit.telemetry.cachedClientID", "");
- user_pref("toolkit.telemetry.newProfilePing.enabled", false); // [FF55+]
- user_pref("toolkit.telemetry.shutdownPingSender.enabled", false); // [FF55+]
- user_pref("toolkit.telemetry.updatePing.enabled", false); // [FF56+]
- user_pref("toolkit.telemetry.bhrPing.enabled", false); // [FF57+] Background Hang Reporter
- user_pref("toolkit.telemetry.firstShutdownPing.enabled", false); // [FF57+]
- user_pref("toolkit.telemetry.hybridContent.enabled", false); // [FF59+]
- /* 0331: disable Telemetry Coverage
- * [1] https://blog.mozilla.org/data/2018/08/20/effectively-measuring-search-in-firefox/ ***/
- user_pref("toolkit.telemetry.coverage.opt-out", true); // [HIDDEN PREF]
- user_pref("toolkit.coverage.opt-out", true); // [FF64+] [HIDDEN PREF]
- user_pref("toolkit.coverage.endpoint.base", "");
- /* 0340: disable Health Reports
- * [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to send technical... data ***/
- user_pref("datareporting.healthreport.uploadEnabled", false);
- /* 0341: disable new data submission, master kill switch [FF41+]
- * If disabled, no policy is shown or upload takes place, ever
- * [1] https://bugzilla.mozilla.org/1195552 ***/
- user_pref("datareporting.policy.dataSubmissionEnabled", false);
- /* 0342: disable Studies (see 0503)
- * [NOTE] This pref has no effect when Health Reports (0340) are disabled
- * [SETTING] Privacy & Security>Firefox Data Collection & Use>...>Allow Firefox to install and run studies ***/
- user_pref("app.shield.optoutstudies.enabled", false);
- /* 0343: disable personalized Extension Recommendations in about:addons and AMO [FF65+]
- * [NOTE] This pref has no effect when Health Reports (0340) are disabled
- * [SETTING] Privacy & Security>Firefox Data Collection & Use>...>Allow Firefox to make personalized extension rec.
- * [1] https://support.mozilla.org/kb/personalized-extension-recommendations ***/
- user_pref("browser.discovery.enabled", false);
- /* 0350: disable Crash Reports ***/
- user_pref("breakpad.reportURL", "");
- user_pref("browser.tabs.crashReporting.sendReport", false); // [FF44+]
- user_pref("browser.crashReports.unsubmittedCheck.enabled", false); // [FF51+]
- /* 0351: disable backlogged Crash Reports
- * [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to send backlogged crash reports ***/
- user_pref("browser.crashReports.unsubmittedCheck.autoSubmit2", false); // [FF58+]
- /* 0370: disable Pocket [FF46+]
- * Pocket is a third party (now owned by Mozilla) "save for later" cloud service
- * [1] https://en.wikipedia.org/wiki/Pocket_(application)
- * [2] https://www.gnu.gl/blog/Posts/multiple-vulnerabilities-in-pocket/ ***/
- user_pref("extensions.pocket.enabled", false);
- /* 0390: disable Captive Portal detection
- * [1] https://en.wikipedia.org/wiki/Captive_portal
- * [2] https://wiki.mozilla.org/Necko/CaptivePortal
- * [3] https://trac.torproject.org/projects/tor/ticket/21790 ***/
- user_pref("captivedetect.canonicalURL", "");
- user_pref("network.captive-portal-service.enabled", false); // [FF52+]
- /* 0391: disable Network Connectivity checks [FF65+]
- * [1] https://bugzilla.mozilla.org/1460537 ***/
- user_pref("network.connectivity-service.enabled", false);
- /*** [SECTION 0400]: BLOCKLISTS / SAFE BROWSING / TRACKING PROTECTION
- This section has security & tracking protection implications vs privacy concerns vs effectiveness
- vs 3rd party 'censorship'. We DO NOT advocate no protection. If you disable Tracking Protection (TP)
- and/or Safe Browsing (SB), then SECTION 0400 REQUIRES YOU HAVE uBLOCK ORIGIN INSTALLED.
- Safe Browsing is designed to protect users from malicious sites. Tracking Protection is designed
- to lessen the impact of third parties on websites to reduce tracking and to speed up your browsing.
- These do rely on 3rd parties (Google for SB and Disconnect for TP), but many steps, which are
- continually being improved, have been taken to preserve privacy. Disable at your own risk.
- ***/
- user_pref("_user.js.parrot", "0400 syntax error: the parrot's passed on!");
- /** BLOCKLISTS ***/
- /* 0401: enable Firefox blocklist, but sanitize blocklist url
- * [NOTE] It includes updates for "revoked certificates"
- * [1] https://blog.mozilla.org/security/2015/03/03/revoking-intermediate-certificates-introducing-onecrl/
- * [2] https://trac.torproject.org/projects/tor/ticket/16931 ***/
- user_pref("extensions.blocklist.enabled", true); // [DEFAULT: true]
- user_pref("extensions.blocklist.url", "https://blocklists.settings.services.mozilla.com/v1/blocklist/3/%APP_ID%/%APP_VERSION%/");
- /* 0403: disable individual unwanted/unneeded parts of the Kinto blocklists
- * What is Kinto?: https://wiki.mozilla.org/Firefox/Kinto#Specifications
- * As Firefox transitions to Kinto, the blocklists have been broken down into entries for certs to be
- * revoked, extensions and plugins to be disabled, and gfx environments that cause problems or crashes ***/
- // user_pref("services.blocklist.onecrl.collection", ""); // revoked certificates
- // user_pref("services.blocklist.addons.collection", "");
- // user_pref("services.blocklist.plugins.collection", "");
- // user_pref("services.blocklist.gfx.collection", "");
- /** SAFE BROWSING (SB)
- This sub-section has been redesigned to differentiate between "real-time"/"user initiated" data
- being sent to Google from all other settings such as using local blocklists/whitelists and updating
- those lists. There are NO privacy issues here. *IF* required, a full url is never sent to Google,
- only a PART-hash of the prefix, and this is hidden with noise of other real PART-hashes. Google also
- swear it is anonymized and only used to flag malicious sites/activity. Firefox also takes measures
- such as striping out identifying parameters and storing safe browsing cookies in a separate jar.
- SB v4 (FF57+) doesn't even use cookies. (#Turn on browser.safebrowsing.debug to monitor this activity)
- #Required reading [#] https://feeding.cloud.geek.nz/posts/how-safe-browsing-works-in-firefox/
- [1] https://wiki.mozilla.org/Security/Safe_Browsing ***/
- /* 0410: disable "Block dangerous and deceptive content"
- * This covers deceptive sites such as phishing and social engineering
- * [SETTING] Privacy & Security>Security>Deceptive Content and Software Protection ***/
- // user_pref("browser.safebrowsing.malware.enabled", false);
- // user_pref("browser.safebrowsing.phishing.enabled", false); // [FF50+]
- /* 0411: disable "Block dangerous downloads"
- * This covers malware and PUPs (potentially unwanted programs)
- * [SETTING] Privacy & Security>Security>Deceptive Content and Software Protection ***/
- // user_pref("browser.safebrowsing.downloads.enabled", false);
- /* 0412: disable "Warn me about unwanted and uncommon software"
- * [SETTING] Privacy & Security>Security>Deceptive Content and Software Protection ***/
- // user_pref("browser.safebrowsing.downloads.remote.block_potentially_unwanted", false); // [FF48+]
- // user_pref("browser.safebrowsing.downloads.remote.block_uncommon", false); // [FF48+]
- // user_pref("browser.safebrowsing.downloads.remote.block_dangerous", false); // [FF49+]
- // user_pref("browser.safebrowsing.downloads.remote.block_dangerous_host", false); // [FF49+]
- /* 0413: disable Google safebrowsing updates ***/
- // user_pref("browser.safebrowsing.provider.google.updateURL", "");
- // user_pref("browser.safebrowsing.provider.google.gethashURL", "");
- // user_pref("browser.safebrowsing.provider.google4.updateURL", ""); // [FF50+]
- // user_pref("browser.safebrowsing.provider.google4.gethashURL", ""); // [FF50+]
- /* 0414: disable binaries NOT in local lists being checked by Google (real-time checking) ***/
- user_pref("browser.safebrowsing.downloads.remote.enabled", false);
- user_pref("browser.safebrowsing.downloads.remote.url", "");
- /* 0415: disable reporting URLs ***/
- user_pref("browser.safebrowsing.provider.google.reportURL", "");
- user_pref("browser.safebrowsing.reportPhishURL", "");
- user_pref("browser.safebrowsing.provider.google4.reportURL", ""); // [FF50+]
- user_pref("browser.safebrowsing.provider.google.reportMalwareMistakeURL", ""); // [FF54+]
- user_pref("browser.safebrowsing.provider.google.reportPhishMistakeURL", ""); // [FF54+]
- user_pref("browser.safebrowsing.provider.google4.reportMalwareMistakeURL", ""); // [FF54+]
- user_pref("browser.safebrowsing.provider.google4.reportPhishMistakeURL", ""); // [FF54+]
- /* 0416: disable 'ignore this warning' on Safe Browsing warnings
- * If clicked, it bypasses the block for that session. This is a means for admins to enforce SB
- * [TEST] see github wiki APPENDIX A: Test Sites: Section 5
- * [1] https://bugzilla.mozilla.org/1226490 ***/
- // user_pref("browser.safebrowsing.allowOverride", false);
- /* 0417: disable data sharing [FF58+] ***/
- user_pref("browser.safebrowsing.provider.google4.dataSharing.enabled", false);
- user_pref("browser.safebrowsing.provider.google4.dataSharingURL", "");
- /** TRACKING PROTECTION (TP)
- There are NO privacy concerns here, but we strongly recommend to use uBlock Origin as well,
- as it offers more comprehensive and specialized lists. It also allows per domain control. ***/
- /* 0420: enable Tracking Protection in all windows
- * [NOTE] TP sends DNT headers regardless of the DNT pref (see 1610)
- * [1] https://wiki.mozilla.org/Security/Tracking_protection
- * [2] https://support.mozilla.org/kb/tracking-protection-firefox ***/
- // user_pref("privacy.trackingprotection.pbmode.enabled", true); // [DEFAULT: true]
- // user_pref("privacy.trackingprotection.enabled", true);
- /* 0422: set which Tracking Protection block list to use
- * [WARNING] We don't recommend enforcing this from here, as available block lists can change
- * [SETTING] Privacy & Security>Content Blocking>All Detected Trackers>Change block list ***/
- // user_pref("urlclassifier.trackingTable", "test-track-simple,base-track-digest256"); // basic
- /* 0423: disable Mozilla's blocklist for known Flash tracking/fingerprinting [FF48+]
- * [1] https://www.ghacks.net/2016/07/18/firefox-48-blocklist-against-plugin-fingerprinting/
- * [2] https://bugzilla.mozilla.org/1237198 ***/
- // user_pref("browser.safebrowsing.blockedURIs.enabled", false);
- /* 0424: disable Mozilla's tracking protection and Flash blocklist updates ***/
- // user_pref("browser.safebrowsing.provider.mozilla.gethashURL", "");
- // user_pref("browser.safebrowsing.provider.mozilla.updateURL", "");
- /* 0425: disable passive Tracking Protection [FF53+]
- * Passive TP annotates channels to lower the priority of network loads for resources on the tracking protection list
- * [NOTE] It has no effect if TP is enabled, but keep in mind that by default TP is only enabled in Private Windows
- * This is included for people who want to completely disable Tracking Protection.
- * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1170190,1141814 ***/
- // user_pref("privacy.trackingprotection.annotate_channels", false);
- // user_pref("privacy.trackingprotection.lower_network_priority", false);
- /*** [SECTION 0500]: SYSTEM ADD-ONS / EXPERIMENTS
- System Add-ons are a method for shipping extensions, considered to be
- built-in features to Firefox, that are hidden from the about:addons UI.
- To view your System Add-ons go to about:support, they are listed under "Firefox Features"
- Some System Add-ons have no on-off prefs. Instead you can manually remove them. Note that app
- updates will restore them. They may also be updated and possibly restored automatically (see 0505)
- * Portable: "...\App\Firefox64\browser\features\" (or "App\Firefox\etc" for 32bit)
- * Windows: "...\Program Files\Mozilla\browser\features" (or "Program Files (X86)\etc" for 32bit)
- * Mac: "...\Applications\Firefox\Contents\Resources\browser\features\"
- [NOTE] On Mac you can right-click on the application and select "Show Package Contents"
- * Linux: "/usr/lib/firefox/browser/features" (or similar)
- [1] https://firefox-source-docs.mozilla.org/toolkit/mozapps/extensions/addon-manager/SystemAddons.html
- [2] https://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
- * alternatively in FF60+, disable uploading to the Screenshots server
- * [1] https://github.com/mozilla-services/screenshots
- * [2] https://www.ghacks.net/2017/05/28/firefox-screenshots-integrated-in-firefox-nightly/ ***/
- // user_pref("extensions.screenshots.disabled", true); // [FF55+]
- // user_pref("extensions.screenshots.upload-disabled", true); // [FF60+]
- /* 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 & Passwords>Autofill addresses
- * [1] https://wiki.mozilla.org/Firefox/Features/Form_Autofill
- * [2] https://www.ghacks.net/2017/05/24/firefoxs-new-form-autofill-is-awesome/ ***/
- user_pref("extensions.formautofill.addresses.enabled", false); // [FF55+]
- user_pref("extensions.formautofill.available", "off"); // [FF56+]
- user_pref("extensions.formautofill.creditCards.enabled", false); // [FF56+]
- user_pref("extensions.formautofill.heuristics.enabled", false); // [FF55+]
- /* 0518: disable Web Compatibility Reporter [FF56+]
- * Web Compatibility Reporter adds a "Report Site Issue" button to send data to Mozilla ***/
- user_pref("extensions.webcompat-reporter.enabled", false);
- /*** [SECTION 0600]: BLOCK IMPLICIT OUTBOUND [not explicitly asked for - e.g. clicked on] ***/
- user_pref("_user.js.parrot", "0600 syntax error: the parrot's no more!");
- /* 0601: disable link prefetching
- * [1] https://developer.mozilla.org/docs/Web/HTTP/Link_prefetching_FAQ ***/
- user_pref("network.prefetch-next", false);
- /* 0602: disable DNS prefetching
- * [1] https://www.ghacks.net/2013/04/27/firefox-prefetching-what-you-need-to-know/
- * [2] https://developer.mozilla.org/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control ***/
- user_pref("network.dns.disablePrefetch", true);
- user_pref("network.dns.disablePrefetchFromHTTPS", true); // [HIDDEN PREF]
- /* 0603: disable Seer/Necko
- * [1] https://developer.mozilla.org/docs/Mozilla/Projects/Necko ***/
- user_pref("network.predictor.enabled", false);
- /* 0605: disable link-mouseover opening connection to linked server
- * [1] https://news.slashdot.org/story/15/08/14/2321202/how-to-quash-firefoxs-silent-requests
- * [2] https://www.ghacks.net/2015/08/16/block-firefox-from-connecting-to-sites-when-you-hover-over-links/ ***/
- user_pref("network.http.speculative-parallel-limit", 0);
- /* 0606: disable pings (but enforce same host in case)
- * [1] http://kb.mozillazine.org/Browser.send_pings
- * [2] http://kb.mozillazine.org/Browser.send_pings.require_same_host ***/
- user_pref("browser.send_pings", false);
- user_pref("browser.send_pings.require_same_host", true);
- /* 0608: disable predictor / prefetching [FF48+] ***/
- user_pref("network.predictor.enable-prefetch", false);
- /*** [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 regarding MAC addresses. They also do not play nice
- * with VPNs. That's even assuming your ISP and/or router and/or website can handle it
- * [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
- * [TEST] http://ipv6leak.com/
- * [1] https://github.com/ghacksuserjs/ghacks-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 (which was based on SPDY which is now deprecated)
- * HTTP2 raises concerns with "multiplexing" and "server push", does nothing to enhance
- * privacy, and in fact opens up a number of server-side fingerprinting opportunities
- * [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://http2.github.io/faq/
- * [2] https://blog.scottlogic.com/2014/11/07/http-2-a-quick-look.html
- * [3] https://queue.acm.org/detail.cfm?id=2716278
- * [4] https://github.com/ghacksuserjs/ghacks-user.js/issues/107 ***/
- 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] http://kb.mozillazine.org/Network.proxy.socks_remote_dns
- * [2] https://trac.torproject.org/projects/tor/wiki/doc/TorifyHOWTO/WebBrowsers ***/
- user_pref("network.proxy.socks_remote_dns", true);
- /* 0706: remove paths when sending URLs to PAC scripts [FF51+]
- * CVE-2017-5384: Information disclosure via Proxy Auto-Config (PAC)
- * [1] https://bugzilla.mozilla.org/1255474 ***/
- user_pref("network.proxy.autoconfig_url.include_path", false); // [DEFAULT: false]
- /* 0707: disable (or setup) DNS-over-HTTPS (DoH) [FF60+]
- * TRR = Trusted Recursive Resolver
- * .mode: 0=off, 1=race, 2=TRR first, 3=TRR only, 4=race for stats but always use native result
- * [WARNING] DoH bypasses hosts and gives info to yet another party (e.g. Cloudflare)
- * [1] https://www.ghacks.net/2018/04/02/configure-dns-over-https-in-firefox/
- * [2] https://hacks.mozilla.org/2018/05/a-cartoon-intro-to-dns-over-https/ ***/
- // user_pref("network.trr.mode", 0);
- // user_pref("network.trr.bootstrapAddress", "");
- // user_pref("network.trr.uri", "");
- /* 0708: disable FTP [FF60+]
- * [1] https://www.ghacks.net/2018/02/20/firefox-60-with-new-preference-to-disable-ftp/ ***/
- // user_pref("network.ftp.enabled", false);
- /* 0709: disable using UNC (Uniform Naming Convention) paths [FF61+]
- * [SETUP-CHROME] Can break extensions for profiles on network shares
- * [1] https://trac.torproject.org/projects/tor/ticket/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://trac.torproject.org/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 [SETUP-CHROME]
- 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 typos to a search engine, give an error message instead ***/
- 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);
- /* 0804: limit history leaks via enumeration (PER TAB: back/forward)
- * This is a PER TAB session history. You still have a full history stored under all history
- * default=50, minimum=1=currentpage, 2 is the recommended minimum as some pages
- * use it as a means of referral (e.g. hotlinking), 4 or 6 or 10 may be more practical ***/
- user_pref("browser.sessionhistory.max_entries", 10);
- /* 0805: disable CSS querying page history - 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] http://lcamtuf.coredump.cx/yahh/ (see github wiki APPENDIX C 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);
- /* 0806: disable displaying javascript in history URLs ***/
- user_pref("browser.urlbar.filter.javascript", true); // [DEFAULT: true]
- /* 0807: disable search bar LIVE search suggestions
- * [SETTING] Search>Provide search suggestions ***/
- user_pref("browser.search.suggest.enabled", false);
- /* 0808: disable location bar LIVE search suggestions (requires 0807 = true)
- * Also disable the location bar prompt to enable/disable or learn more about it.
- * [SETTING] Search>Show search suggestions in address bar results ***/
- user_pref("browser.urlbar.suggest.searches", false);
- user_pref("browser.urlbar.userMadeSearchSuggestionsChoice", true); // [FF41+]
- /* 0809: disable location bar suggesting "preloaded" top websites [FF54+]
- * [1] https://bugzilla.mozilla.org/1211726 ***/
- user_pref("browser.urlbar.usepreloadedtopurls.enabled", false);
- /* 0810: disable location bar making speculative connections [FF56+]
- * [1] https://bugzilla.mozilla.org/1348275 ***/
- user_pref("browser.urlbar.speculativeConnect.enabled", false);
- /* 0850a: disable location bar suggestion types
- * [SETUP-CHROME] If all three suggestion types are false, search engine keywords are disabled
- * [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);
- /* 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 0808)
- * [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] http://kb.mozillazine.org/Inline_autocomplete ***/
- // user_pref("browser.urlbar.autoFill", false);
- /* 0850e: disable location bar one-off searches [FF51+]
- * [1] https://www.ghacks.net/2016/08/09/firefox-one-off-searches-address-bar/ ***/
- // user_pref("browser.urlbar.oneOffSearches", false);
- /* 0860: disable search and form history
- * [NOTE] You can clear formdata on exiting Firefox (see 2803)
- * [SETTING] Privacy & Security>History>Custom Settings>Remember search and form history ***/
- user_pref("browser.formfill.enable", false);
- /* 0862: disable browsing and download history
- * [NOTE] You can 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);
- /* 0864: disable date/time picker
- * This can leak your locale if not en-US
- * [1] https://trac.torproject.org/projects/tor/ticket/21787 ***/
- user_pref("dom.forms.datetime", 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>Forms & Passwords>Ask to save logins and passwords for websites ***/
- // user_pref("signon.rememberSignons", false);
- /* 0902: use a master password (recommended if you save passwords)
- * There are no preferences for this. It is all handled internally.
- * [SETTING] Privacy & Security>Forms & Passwords>Use a master password
- * [1] https://support.mozilla.org/kb/use-master-password-protect-stored-logins ***/
- /* 0903: set how often Firefox should ask for the master 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 master 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] Password will still be auto-filled after a user name is manually entered
- * [1] http://kb.mozillazine.org/Signon.autofillForms ***/
- user_pref("signon.autofillForms", false);
- /* 0906: disable websites' autocomplete="off" [FF30+]
- * Don't let sites dictate use of saved logins and passwords. Increase security through
- * stronger password use. The trade-off is the convenience. Some sites should never be
- * saved (such as banking sites). Set at true, informed users can make their own choice. ***/
- user_pref("signon.storeWhenAutocompleteOff", true); // [DEFAULT: true]
- /* 0907: display warnings for logins on non-secure (non HTTPS) pages
- * [1] https://bugzilla.mozilla.org/1217156 ***/
- user_pref("security.insecure_password.ui.enabled", true);
- /* 0909: disable formless login capture for Password Manager [FF51+] ***/
- user_pref("signon.formlessCapture.enabled", false);
- /* 0910: disable autofilling saved passwords on HTTP pages and show warning [FF52+]
- * [1] https://www.fxsitecompat.com/en-CA/docs/2017/insecure-login-forms-now-disable-autofill-show-warning-beneath-input-control/
- * [2] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1217152,1319119 ***/
- user_pref("signon.autofillForms.http", false);
- user_pref("security.insecure_field_warning.contextual.enabled", true);
- /* 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)
- * [1] https://www.fxsitecompat.com/en-CA/docs/2015/http-auth-dialog-can-no-longer-be-triggered-by-cross-origin-resources/ ***/
- user_pref("network.auth.subresource-http-auth-allow", 1);
- /*** [SECTION 1000]: CACHE / SESSION (RE)STORE / FAVICONS [SETUP-CHROME]
- ETAG [1] and other [2][3] cache tracking/fingerprinting techniques can be averted by
- disabling *BOTH* disk (1001) and memory (1003) cache. ETAGs can also be neutralized
- by modifying response headers [4]. Another solution is to use a hardened configuration
- with Temporary Containers [5]. Alternatively, you can *LIMIT* exposure by clearing
- cache on close (2803). or on a regular basis manually or 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://github.com/ghacksuserjs/ghacks-user.js/wiki/4.2.4-Header-Editor
- [5] https://medium.com/@stoically/enhance-your-privacy-in-firefox-with-temporary-containers-33925cd6cd21
- ***/
- user_pref("_user.js.parrot", "1000 syntax error: the parrot's gone to meet 'is maker!");
- /** CACHE ***/
- /* 1001: disable disk cache ***/
- user_pref("browser.cache.disk.enable", false);
- user_pref("browser.cache.disk.capacity", 0);
- user_pref("browser.cache.disk.smart_size.enabled", false);
- user_pref("browser.cache.disk.smart_size.first_run", false);
- /* 1002: disable disk cache for SSL pages
- * [1] http://kb.mozillazine.org/Browser.cache.disk_cache_ssl ***/
- user_pref("browser.cache.disk_cache_ssl", false);
- /* 1003: disable memory cache
- * [NOTE] Not recommended due to performance issues ***/
- // user_pref("browser.cache.memory.enable", false);
- // user_pref("browser.cache.memory.capacity", 0); // [HIDDEN PREF]
- /* 1005: disable fastback cache
- * To improve performance when pressing back/forward Firefox stores visited pages
- * so they don't have to be re-parsed. This is not the same as memory cache.
- * 0=none, -1=auto (that's minus 1), or for other values see [1]
- * [WARNING] Not recommended unless you know what you're doing
- * [1] http://kb.mozillazine.org/Browser.sessionhistory.max_total_viewers ***/
- // user_pref("browser.sessionhistory.max_total_viewers", 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]
- /* 1008: set DNS cache and expiration time (default 400 and 60, same as Tor Browser) ***/
- // user_pref("network.dnsCacheEntries", 400);
- // user_pref("network.dnsCacheExpiration", 60);
- /** 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 tabs and new bookmarks
- * bookmark favicons are stored as data blobs in favicons.sqlite ***/
- // 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)
- Note that your cipher and other settings can be used server side as a fingerprint attack
- vector, see [1] (It's quite technical but the first part is easy to understand
- and you can stop reading when you reach the second section titled "Enter Bro")
- Option 1: Use defaults for ciphers (1260's). There is nothing *weak* about these, but
- due to breakage, browsers can't deprecate them until the web stops using them
- Option 2: Disable the ciphers in 1261, 1262 and 1263. These shouldn't break anything.
- Optionally, disable the ciphers in 1264.
- [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: disable old SSL/TLS "insecure" renegotiation (vulnerable to a MiTM attack)
- * [SETUP-WEB] <2% of secure sites do NOT support the newer "secure" renegotiation, see [2]
- * [1] https://wiki.mozilla.org/Security:Renegotiation
- * [2] https://www.ssllabs.com/ssl-pulse/ ***/
- user_pref("security.ssl.require_safe_negotiation", true);
- /* 1202: control TLS versions with min and max
- * 1=TLS 1.0, 2=TLS 1.1, 3=TLS 1.2, 4=TLS 1.3
- * [NOTE] Jul-2017: Telemetry indicates approx 2% of TLS web traffic uses 1.0 or 1.1
- * [1] http://kb.mozillazine.org/Security.tls.version.*
- * [2] https://www.ssl.com/how-to/turn-off-ssl-3-0-and-tls-1-0-in-your-browser/
- * [2] archived: https://archive.is/hY2Mm ***/
- // user_pref("security.tls.version.min", 3);
- user_pref("security.tls.version.max", 4);
- /* 1203: 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]
- /* 1204: 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", "");
- /* 1205: disable TLS1.3 0-RTT (round-trip time) [FF51+]
- * [1] https://github.com/tlswg/tls13-spec/issues/1001
- * [2] https://blog.cloudflare.com/tls-1-3-overview-and-q-and-a/ ***/
- user_pref("security.tls.enable_0rtt_data", false);
- /** OCSP (Online Certificate Status Protocol)
- #Required reading [#] https://scotthelme.co.uk/revocation-is-broken/ ***/
- /* 1210: enable OCSP Stapling
- * [1] https://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox/ ***/
- user_pref("security.ssl.enable_ocsp_stapling", true);
- /* 1211: control when to use OCSP fetching (to confirm current validity of certificates)
- * 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://trac.torproject.org/projects/tor/ticket/21686 ***/
- user_pref("security.family_safety.mode", 0);
- /* 1222: disable intermediate certificate caching (fingerprinting attack vector) [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.
- * [TEST] https://fiprinca.0x90.eu/poc/
- * [1] https://bugzilla.mozilla.org/1334485 - related bug
- * [2] https://bugzilla.mozilla.org/1216882 - related bug (see comment 9) ***/
- // 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
- * [WARNING] 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://trac.torproject.org/projects/tor/ticket/16206 ***/
- user_pref("security.cert_pinning.enforcement_level", 2);
- /** MIXED CONTENT ***/
- /* 1240: disable insecure active content on https pages
- * [1] https://trac.torproject.org/projects/tor/ticket/21323 ***/
- user_pref("security.mixed_content.block_active_content", true); // [DEFAULT: true]
- /* 1241: disable insecure passive content (such as images) on https pages ***/
- user_pref("security.mixed_content.block_display_content", true);
- /* 1243: block unencrypted requests from Flash on encrypted pages to mitigate MitM attacks [FF59+]
- * [1] https://bugzilla.mozilla.org/1190623 ***/
- user_pref("security.mixed_content.block_object_subrequest", true);
- /** CIPHERS [see the section 1200 intro] ***/
- /* 1261: disable 3DES (effective key size < 128)
- * [1] https://en.wikipedia.org/wiki/3des#Security
- * [2] http://en.citizendium.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);
- /* 1262: disable 128 bits ***/
- // user_pref("security.ssl3.ecdhe_ecdsa_aes_128_sha", false);
- // user_pref("security.ssl3.ecdhe_rsa_aes_128_sha", false);
- /* 1263: disable DHE (Diffie-Hellman Key Exchange)
- * [1] https://www.eff.org/deeplinks/2015/10/how-to-protect-yourself-from-nsa-attacks-1024-bit-DH ***/
- // user_pref("security.ssl3.dhe_rsa_aes_128_sha", false);
- // user_pref("security.ssl3.dhe_rsa_aes_256_sha", false);
- /* 1264: disable the remaining non-modern cipher suites as of FF52 ***/
- // user_pref("security.ssl3.rsa_aes_128_sha", false);
- // user_pref("security.ssl3.rsa_aes_256_sha", false);
- /** UI (User Interface) ***/
- /* 1270: display warning (red padlock) for "broken security" (see 1201)
- * [1] https://wiki.mozilla.org/Security:Renegotiation ***/
- 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+]
- user_pref("security.insecure_connection_text.enabled", true); // [FF60+]
- // user_pref("security.insecure_connection_icon.pbmode.enabled", true); // [FF59+] private windows only
- // user_pref("security.insecure_connection_text.pbmode.enabled", true); // [FF60+] private windows only
- /*** [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)
- * If you disallow fonts, this drastically limits/reduces font
- * enumeration (by JS) which is a high entropy fingerprinting vector.
- * [NOTE] Disabling fonts can uglify the web a fair bit.
- * [SETTING] General>Language and Appearance>Fonts & Colors>Advanced>Allow pages to choose... ***/
- user_pref("browser.display.use_document_fonts", 0);
- /* 1402: set more legible default fonts
- * [NOTE] Example below for Windows/Western only
- * [SETTING] General>Language and Appearance>Fonts & Colors>Advanced>Serif|Sans-serif|Monospace ***/
- // user_pref("font.name.serif.x-unicode", "Georgia");
- // user_pref("font.name.serif.x-western", "Georgia"); // default: Times New Roman
- // user_pref("font.name.sans-serif.x-unicode", "Arial");
- // user_pref("font.name.sans-serif.x-western", "Arial"); // default: Arial
- // user_pref("font.name.monospace.x-unicode", "Lucida Console");
- // user_pref("font.name.monospace.x-western", "Lucida Console"); // default: Courier New
- /* 1403: disable icon fonts (glyphs) and local fallback rendering
- * [1] https://bugzilla.mozilla.org/789788
- * [2] https://trac.torproject.org/projects/tor/ticket/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);
- /* 1405: disable WOFF2 (Web Open Font Format) [FF35+] ***/
- user_pref("gfx.downloadable_fonts.woff2.enabled", false);
- /* 1406: disable CSS Font Loading API
- * [NOTE] Disabling fonts can uglify the web a fair bit. ***/
- user_pref("layout.css.font-loading-api.enabled", false);
- /* 1407: disable special underline handling for a few fonts which you will probably never use [RESTART]
- * Any of these fonts on your system can be enumerated for fingerprinting.
- * [1] http://kb.mozillazine.org/Font.blacklist.underline_offset ***/
- user_pref("font.blacklist.underline_offset", "");
- /* 1408: disable graphite which FF49 turned back on by default
- * In the past it had security issues. Update: This continues to be the case, see [1]
- * [1] https://www.mozilla.org/security/advisories/mfsa2017-15/#CVE-2017-7778 ***/
- 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] Creating your own probably highly-unique whitelist will raise your entropy.
- * Eventually privacy.resistFingerprinting (see 4500) will cover this (and 1401 can be relaxed)
- * [1] https://bugzilla.mozilla.org/1121643 ***/
- // user_pref("font.system.whitelist", ""); // [HIDDEN PREF]
- /*** [SECTION 1600]: HEADERS / REFERERS
- Only *cross domain* referers need controlling and XOriginPolicy (1603) is perfect for that. Thus we enforce
- the default values for 1601, 1602, 1605 and 1606 to minimize breakage, and only tweak 1603 and 1604.
- Our default settings provide the best balance between protection and amount of breakage.
- To harden it a bit more you can set XOriginPolicy (1603) to 2 (+ optionally 1604 to 1 or 2).
- To fix broken sites (including your modem/router), temporarily set XOriginPolicy=0 and XOriginTrimmingPolicy=2 in about:config,
- use the site and then change the values back. If you visit those sites regularly (e.g. vimeo), 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);
- /* 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);
- /* 1603: CROSS ORIGIN: control when to send a referer [SETUP-WEB]
- * 0=always (default), 1=only if base domains match, 2=only if hosts match ***/
- 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);
- /* 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 TP (see 0420) regardless of this pref
- * [SETTING] Privacy & Security>Content Blocking>Send websites a "Do Not Track"... ***/
- 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: enable a private container for thumbnail loads [FF51+] ***/
- user_pref("privacy.usercontext.about_newtab_segregation.enabled", true); // [DEFAULT: true in FF61+]
- /* 1704: set behaviour on "+ Tab" button to display container menu [FF53+] [SETUP-CHROME]
- * 0=no menu (default), 1=show when clicked, 2=show on long press
- * [NOTE] The menu does not contain a non-container tab option (use Ctrl+T to open non-container tab)
- * [1] https://bugzilla.mozilla.org/1328756 ***/
- user_pref("privacy.userContext.longPressBehavior", 2);
- /*** [SECTION 1800]: PLUGINS ***/
- user_pref("_user.js.parrot", "1800 syntax error: the parrot's pushing up daisies!");
- /* 1801: set default plugin state (i.e. new plugins on discovery) to never activate
- * 0=disabled, 1=ask to activate, 2=active - you can override individual plugins ***/
- user_pref("plugin.default.state", 0);
- user_pref("plugin.defaultXpi.state", 0);
- /* 1802: enable click to play and set to 0 minutes ***/
- user_pref("plugins.click_to_play", true);
- user_pref("plugin.sessionPermissionNow.intervalInMinutes", 0);
- /* 1803: disable Flash plugin (Add-ons>Plugins)
- * 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
- * [1] https://www.ghacks.net/2013/07/09/how-to-make-sure-that-a-firefox-plugin-never-activates-again/ ***/
- user_pref("plugin.state.flash", 0);
- /* 1805: disable scanning for plugins [WINDOWS]
- * [1] http://kb.mozillazine.org/Plugin_scanning
- * plid.all = whether to scan the directories specified in the Windows registry for PLIDs.
- * Used to detect RealPlayer, Java, Antivirus etc, but since FF52 only covers Flash ***/
- user_pref("plugin.scan.plid.all", false);
- /* 1820: disable all GMP (Gecko Media Plugins) [SETUP-WEB]
- * [1] https://wiki.mozilla.org/GeckoMediaPlugins ***/
- user_pref("media.gmp-provider.enabled", false);
- user_pref("media.gmp.trial-create.enabled", false);
- user_pref("media.gmp-manager.url", "data:text/plain,");
- user_pref("media.gmp-manager.url.override", "data:text/plain,"); // [HIDDEN PREF]
- user_pref("media.gmp-manager.updateEnabled", false); // disable local fallback [HIDDEN PREF]
- /* 1825: disable widevine CDM (Content Decryption Module) [SETUP-WEB] ***/
- user_pref("media.gmp-widevinecdm.visible", false);
- user_pref("media.gmp-widevinecdm.enabled", false);
- user_pref("media.gmp-widevinecdm.autoupdate", false);
- /* 1830: disable all DRM content (EME: Encryption Media Extension) [SETUP-WEB]
- * [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);
- /* 1840: disable the OpenH264 Video Codec by Cisco to "Never Activate" [SETUP-WEB]
- * This is the bundled codec used for video chat in WebRTC ***/
- user_pref("media.gmp-gmpopenh264.enabled", false); // [HIDDEN PREF]
- user_pref("media.gmp-gmpopenh264.autoupdate", 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)
- * [1] https://www.privacytools.io/#webrtc ***/
- user_pref("media.peerconnection.enabled", false);
- /* 2002: limit WebRTC IP leaks if using WebRTC
- * [TEST] https://browserleaks.com/webrtc
- * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1189041,1297416
- * [2] https://wiki.mozilla.org/Media/WebRTC/Privacy ***/
- user_pref("media.peerconnection.ice.default_address_only", true);
- user_pref("media.peerconnection.ice.no_host", true); // [FF51+]
- /* 2010: disable WebGL (Web Graphics Library), force bare minimum feature set if used & disable WebGL extensions
- * [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("pdfjs.enableWebGL", false);
- user_pref("webgl.min_capability_mode", true);
- user_pref("webgl.disable-extensions", true);
- user_pref("webgl.disable-fail-if-major-performance-caveat", true);
- /* 2012: disable two more webgl preferences [FF51+] ***/
- user_pref("webgl.dxgl.enabled", false); // [WINDOWS]
- user_pref("webgl.enable-webgl2", false);
- /* 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);
- /* 2026: disable canvas capture stream [FF41+]
- * [1] https://developer.mozilla.org/docs/Web/API/HTMLCanvasElement/captureStream ***/
- user_pref("canvas.capturestream.enabled", false);
- /* 2027: disable camera image capture [FF35+]
- * [1] https://trac.torproject.org/projects/tor/ticket/16339 ***/
- user_pref("dom.imagecapture.enabled", false); // [DEFAULT: false]
- /* 2028: disable offscreen canvas [FF44+]
- * [1] https://developer.mozilla.org/docs/Web/API/OffscreenCanvas ***/
- user_pref("gfx.offscreencanvas.enabled", false); // [DEFAULT: false]
- /* 2030: disable autoplay of HTML5 media [FF63+]
- * 0=Allowed, 1=Blocked (2=Prompt - removed in FF66)
- * [NOTE] You can set exceptions under site permissions
- * [SETTING] Privacy & Security>Permissions>Block websites from automatically playing sound ***/
- user_pref("media.autoplay.default", 1);
- /* 2031: disable autoplay of HTML5 media if you interacted with the site [FF66+] ***/
- user_pref("media.autoplay.enabled.user-gestures-needed", false);
- /* 2032: disable audio autoplay in non-active tabs [FF51+]
- * [1] https://www.ghacks.net/2016/11/14/firefox-51-blocks-automatic-audio-playback-in-non-active-tabs/ ***/
- user_pref("media.block-autoplay-until-in-foreground", true);
- /*** [SECTION 2200]: WINDOW MEDDLING & LEAKS / POPUPS ***/
- user_pref("_user.js.parrot", "2200 syntax error: the parrot's 'istory!");
- /* 2201: prevent websites from disabling new window features
- * [1] http://kb.mozillazine.org/Prevent_websites_from_disabling_new_window_features ***/
- user_pref("dom.disable_window_open_feature.close", true);
- user_pref("dom.disable_window_open_feature.location", true); // [DEFAULT: true]
- user_pref("dom.disable_window_open_feature.menubar", true);
- user_pref("dom.disable_window_open_feature.minimizable", true);
- user_pref("dom.disable_window_open_feature.personalbar", true); // bookmarks toolbar
- user_pref("dom.disable_window_open_feature.resizable", true); // [DEFAULT: true]
- user_pref("dom.disable_window_open_feature.status", true); // [DEFAULT: true]
- user_pref("dom.disable_window_open_feature.titlebar", true);
- user_pref("dom.disable_window_open_feature.toolbar", true);
- /* 2202: prevent scripts from moving and resizing open windows ***/
- user_pref("dom.disable_window_move_resize", true);
- /* 2203: open links targeting new windows in a new tab instead
- * This stops malicious window sizes and some screen resolution leaks.
- * You can still right-click a link and open in a new window.
- * [TEST] https://people.torproject.org/~gk/misc/entire_desktop.html
- * [1] https://trac.torproject.org/projects/tor/ticket/9881 ***/
- user_pref("browser.link.open_newwindow", 3);
- user_pref("browser.link.open_newwindow.restriction", 0);
- /* 2204: disable Fullscreen API (requires user interaction) to prevent screen-resolution leaks
- * [NOTE] You can still manually toggle the browser's fullscreen state (F11),
- * but this pref will disable embedded video/game fullscreen controls, e.g. youtube
- * [TEST] https://developer.mozilla.org/samples/domref/fullscreen.html ***/
- // 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);
- /* 2211: set max popups from a single non-click event - default is 20! ***/
- user_pref("dom.popup_maximum", 3);
- /* 2212: limit events that can cause a popup
- * default is "change click dblclick mouseup pointerup notificationclick reset submit touchend"
- * [1] http://kb.mozillazine.org/Dom.popup_allowed_events ***/
- 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.
- [SETUP-WEB] Disabling "web workers" might break sites
- [UPDATE] uMatrix 1.2.0+ allows a per-scope control for workers (2301-deprecated) and service workers (2302)
- #Required reading [#] https://github.com/gorhill/uMatrix/releases/tag/1.2.0
- [1] Web Workers: https://developer.mozilla.org/docs/Web/API/Web_Workers_API
- [2] Worker: https://developer.mozilla.org/docs/Web/API/Worker
- [3] Service Worker: https://developer.mozilla.org/docs/Web/API/Service_Worker_API
- [4] SharedWorker: https://developer.mozilla.org/docs/Web/API/SharedWorker
- [5] ChromeWorker: https://developer.mozilla.org/docs/Web/API/ChromeWorker
- [6] Notifications: https://support.mozilla.org/questions/1165867#answer-981820
- ***/
- 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. ***/
- user_pref("dom.serviceWorkers.enabled", false);
- /* 2304: disable web notifications
- * [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: set a default permission for Notifications (see 2304) [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);
- /* 2306: disable push notifications [FF44+]
- * web apps can receive messages pushed to them from a server, whether or
- * not the web app is in the foreground, or even currently loaded
- * [1] https://developer.mozilla.org/docs/Web/API/Push_API ***/
- user_pref("dom.push.enabled", false);
- user_pref("dom.push.connection.enabled", false);
- user_pref("dom.push.serverURL", "");
- user_pref("dom.push.userAgentID", "");
- /*** [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-WEB] This will break some sites functionality such as pasting into facebook, wordpress
- * this applies to onCut, onCopy, onPaste events - i.e. you have to interact with
- * the website for it to look at the clipboard
- * [1] https://www.ghacks.net/2014/01/08/block-websites-reading-modifying-clipboard-contents-firefox/ ***/
- user_pref("dom.event.clipboardevents.enabled", false);
- /* 2403: 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); // [HIDDEN PREF]
- /* 2404: 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 help harden JS against exploits
- * [SETUP-PERF] If false, causes the odd site issue and there is also a 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);
- /* 2422: disable WebAssembly [FF52+] [SETUP-PERF]
- * [1] https://developer.mozilla.org/docs/WebAssembly ***/
- user_pref("javascript.options.wasm", false);
- /* 2426: disable Intersection Observer API [FF53+]
- * Almost a year to complete, three versions late to stable (as default false),
- * number #1 cause of crashes in nightly numerous times, and is (primarily) an
- * ad network API for "ad viewability checks" down to a pixel level
- * [1] https://developer.mozilla.org/docs/Web/API/Intersection_Observer_API
- * [2] https://w3c.github.io/IntersectionObserver/
- * [3] https://bugzilla.mozilla.org/1243846 ***/
- user_pref("dom.IntersectionObserver.enabled", false);
- /* 2427: disable Shared Memory (Spectre mitigation)
- * [1] https://github.com/tc39/ecmascript_sharedmem/blob/master/TUTORIAL.md
- * [2] https://blog.mozilla.org/security/2018/01/03/mitigations-landing-new-class-timing-attack/ ***/
- user_pref("javascript.options.shared_memory", false);
- /* 2428: enforce DOMHighResTimeStamp API
- * [WARNING] Required for normalization of timestamps and any timer resolution mitigations ***/
- user_pref("dom.event.highrestimestamp.enabled", true); // [DEFAULT: true]
- /* 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);
- /*** [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);
- /* 2504: 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);
- /* 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-PERF] 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+]
- * [SETUP-PERF] 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);
- /*** [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
- * [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]
- /* 2605: block web content in file processes [FF55+]
- * [SETUP-WEB] You may want to disable this for corporate or developer environments
- * [1] https://bugzilla.mozilla.org/1343184 ***/
- user_pref("browser.tabs.remote.allowLinkedWebInFileUriProcess", false);
- /* 2606: disable UITour backend so there is no chance that a remote page can use it ***/
- user_pref("browser.uitour.enabled", false);
- user_pref("browser.uitour.url", "");
- /* 2607: disable various developer tools in browser context
- * [SETTING] Devtools>Advanced Settings>Enable browser chrome and add-on debugging toolboxes
- * [1] https://github.com/pyllyukko/user.js/issues/179#issuecomment-246468676 ***/
- user_pref("devtools.chrome.enabled", false);
- /* 2608: disable WebIDE to prevent remote debugging and ADB extension download
- * [1] https://trac.torproject.org/projects/tor/ticket/16222 ***/
- user_pref("devtools.debugger.remote-enabled", false);
- user_pref("devtools.webide.enabled", false);
- user_pref("devtools.webide.autoinstallADBExtension", false); // [FF64+]
- /* 2609: disable MathML (Mathematical Markup Language) [FF51+]
- * [TEST] http://browserspy.dk/mathml.php
- * [1] https://bugzilla.mozilla.org/1173199 ***/
- user_pref("mathml.disabled", true);
- /* 2610: disable in-content SVG (Scalable Vector Graphics) [FF53+]
- * [SETUP-WEB] 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://trac.torproject.org/projects/tor/ticket/10089
- * [2] http://kb.mozillazine.org/Middlemouse.contentLoadURL ***/
- 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
- * [NOTE] In FF65 and under, causes issues with delete and backspace keys (see 1445942)
- * [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", "");
- /* 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); // [HIDDEN PREF]
- /* 2619: enforce Punycode for Internationalized Domain Names to eliminate possible spoofing
- * Firefox has *some* protections, but it is better to be safe than sorry. The downside: it will also
- * display legitimate IDN's punycoded, which might be undesirable for users of non-latin alphabets
- * [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: enable Firefox's built-in PDF reader
- * This setting controls if the option "Display in Firefox" in the above setting is available
- * 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);
- /* 2621: disable links launching Windows Store on Windows 8/8.1/10 [WINDOWS]
- * [1] https://www.ghacks.net/2016/03/25/block-firefox-chrome-windows-store/ ***/
- user_pref("network.protocol-handler.external.ms-windows-store", false);
- /** DOWNLOADS ***/
- /* 2650: discourage downloading to desktop (0=desktop 1=downloads 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 the user where to download
- * [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+]
- * 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.
- * [SETUP-CHROME] 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 directories (see GitHub issue #674 for an issue with language packs in Linux)
- * [1] https://mike.kaply.com/2012/02/21/understanding-add-on-scopes/
- * [1] archived: https://archive.is/DYjAM ***/
- user_pref("extensions.enabledScopes", 1); // [HIDDEN PREF]
- user_pref("extensions.autoDisableScopes", 15);
- /* 2662: disable webextension restrictions on certain mozilla domains (also see 4503) [FF60+]
- * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1384330,1406795,1415644,1453988 ***/
- // user_pref("extensions.webextensions.restrictedDomains", "");
- /* 2663: enable warning when websites try to install add-ons
- * [SETTING] Privacy & Security>Permissions>Warn you when websites try to install add-ons ***/
- user_pref("xpinstall.whitelist.required", true); // [DEFAULT: true]
- /** SECURITY ***/
- /* 2680: enable CSP (Content Security Policy)
- * [1] https://developer.mozilla.org/docs/Web/HTTP/CSP ***/
- user_pref("security.csp.enable", true); // [DEFAULT: true]
- /* 2682: enable CSP 1.1 experimental hash-source directive [FF29+]
- * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=855326,883975 ***/
- user_pref("security.csp.experimentalEnabled", true);
- /* 2683: block top level window data: URIs [FF56+]
- * [1] https://bugzilla.mozilla.org/1331351
- * [2] https://www.wordfence.com/blog/2017/01/gmail-phishing-data-uri/
- * [3] https://www.fxsitecompat.com/en-CA/docs/2017/data-url-navigations-on-top-level-window-will-be-blocked/ ***/
- user_pref("security.data_uri.block_toplevel_data_uri_navigations", true); // [DEFAULT: true]
- /* 2684: enforce a security delay on some confirmation dialogs such as install, open/save
- * [1] http://kb.mozillazine.org/Disable_extension_install_delay_-_Firefox
- * [2] 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
- * 0=Accept cookies and site data (default), 1=(Block) All third-party cookies, 2=(Block) All cookies,
- * 3=(Block) Cookies from unvisited sites, 4=(Block) Third-party trackers (FF63+)
- * [NOTE] Value 4 is tied to the Tracking Protection lists
- * [NOTE] You can set exceptions under site permissions or use an extension
- * [SETTING] Privacy & Security>Content Blocking>Custom>Choose what to block>Cookies ***/
- user_pref("network.cookie.cookieBehavior", 1);
- /* 2702: set third-party cookies (i.e ALL) (if enabled, see 2701) to session-only
- and (FF58+) set third-party non-secure (i.e HTTP) cookies to session-only
- [NOTE] .sessionOnly overrides .nonsecureSessionOnly except when .sessionOnly=false and
- .nonsecureSessionOnly=true. This allows you to keep HTTPS cookies, but session-only HTTP ones
- * [1] https://feeding.cloud.geek.nz/posts/tweaking-cookies-for-privacy-in-firefox/
- * [2] http://kb.mozillazine.org/Network.cookie.thirdparty.sessionOnly ***/
- 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);
- /* 2705: disable HTTP sites setting cookies with the "secure" directive [FF52+]
- * [1] https://developer.mozilla.org/Firefox/Releases/52#HTTP ***/
- user_pref("network.cookie.leave-secure-alone", true); // [DEFAULT: true]
- /* 2706: enable support for same-site cookies [FF60+]
- * [1] https://bugzilla.mozilla.org/795346
- * [2] https://blog.mozilla.org/security/2018/04/24/same-site-cookies-in-firefox-60/
- * [3] https://www.sjoerdlangkemper.nl/2016/04/14/preventing-csrf-with-samesite-cookie-attribute/ ***/
- // user_pref("network.cookie.same-site.enabled", true); // [DEFAULT: true]
- /* 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);
- /* 2720: enforce IndexedDB (IDB) as enabled
- * IDB is required for extensions and Firefox internals (even before FF63 in [1])
- * To control *website* IDB data, control allowing cookies and service workers, or use
- * Temporary Containers. To mitigate *website* IDB, FPI helps (4001), and/or sanitize
- * on close (Offline Website Data, see 2800) or on-demand (Ctrl-Shift-Del), or automatically
- * via an extension. Note that IDB currently cannot be sanitized by host.
- * [1] https://blog.mozilla.org/addons/2018/08/03/new-backend-for-storage-local-api/ ***/
- user_pref("dom.indexedDB.enabled", true); // [DEFAULT: true]
- /* 2730: disable offline cache ***/
- user_pref("browser.cache.offline.enable", false);
- /* 2730b: disable offline cache on insecure sites [FF60+]
- * [1] https://blog.mozilla.org/security/2018/02/12/restricting-appcache-secure-contexts/ ***/
- user_pref("browser.cache.offline.insecure.enable", false); // [DEFAULT: false in FF62+]
- /* 2731: enforce websites to ask to store data for offline use
- * [1] https://support.mozilla.org/questions/1098540
- * [2] https://bugzilla.mozilla.org/959985 ***/
- user_pref("offline-apps.allow_by_default", false);
- /* 2740: disable service workers cache and cache storage
- * [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 [SETUP-CHROME]
- 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)
- * [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)
- * 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: privacy.*.openWindows (clear session restore data) [FF34+]
- * [NOTE] There is a years-old bug that these cause two windows when Firefox restarts.
- * You do not need these anyway if session restore is cleared with history (see 2803) ***/
- // 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)
- ** 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+)
- ***/
- 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 ***/
- 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); // [HIDDEN PREF]
- /*** [SECTION 4500]: RFP (RESIST FINGERPRINTING)
- This master switch will be used for a wide range of items, many of which will
- **override** existing prefs from FF55+, often providing a **better** solution
- IMPORTANT: As existing prefs become redundant, and some of them WILL interfere
- with how RFP works, they will be moved to section 4600 and made inactive
- ** 418986 - limit window.screen & CSS media queries leaking identifiable info (FF41+)
- [POC] http://ip-check.info/?lang=en (screen, usable screen, and browser window will match)
- [NOTE] Does not cover everything yet - https://bugzilla.mozilla.org/1216800
- [NOTE] This will probably make your values pretty unique until you resize or snap the
- inner window width + height into standard/common resolutions (such as 1366x768)
- To set a size, open a XUL (chrome) page (such as about:config) which is at 100% zoom, hit
- Shift+F4 to open the scratchpad, type window.resizeTo(1366,768), hit Ctrl+R to run. Test
- your window size, do some math, resize to allow for all the non inner window elements
- [TEST] https://ghacksuserjs.github.io/TorZillaPrint/TorZillaPrint.html#screen
- ** 1281949 - spoof screen orientation (FF50+)
- ** 1281963 - hide the contents of navigator.plugins and navigator.mimeTypes (FF50+)
- FF53: Fixes GetSupportedNames in nsMimeTypeArray and nsPluginArray (1324044)
- ** 1330890 - spoof timezone as UTC 0 (FF55+)
- FF58: Date.toLocaleFormat deprecated (818634)
- FF60: Date.toLocaleDateString and Intl.DateTimeFormat fixed (1409973)
- ** 1360039 - spoof navigator.hardwareConcurrency as 2 (see 4601) (FF55+)
- This spoof *shouldn't* affect core chrome/Firefox performance
- ** 1217238 - reduce precision of time exposed by javascript (FF55+)
- ** 1369303 - spoof/disable performance API (see 2410-deprecated, 4602, 4603) (FF56+)
- ** 1333651 & 1383495 & 1396468 - spoof Navigator API (see section 4700) (FF56+)
- FF56: The version number will be rounded down to the nearest multiple of 10
- FF57: The version number will match current ESR (1393283, 1418672, 1418162, 1511763)
- FF59: The OS will be reported as Windows, OSX, Android, or Linux (to reduce breakage) (1404608)
- FF66: The OS in HTTP Headers will be reduced to Windows or Android (1509829)
- ** 1369319 - disable device sensor API (see 4604) (FF56+)
- ** 1369357 - disable site specific zoom (see 4605) (FF56+)
- ** 1337161 - hide gamepads from content (see 4606) (FF56+)
- ** 1372072 - spoof network information API as "unknown" when dom.netinfo.enabled = true (see 4607) (FF56+)
- ** 1333641 - reduce fingerprinting in WebSpeech API (see 4608) (FF56+)
- ** 1372069 & 1403813 & 1441295 - block geolocation requests (same as denying a site permission) (see 0201, 0201b) (FF56-62)
- ** 1369309 - spoof media statistics (see 4610) (FF57+)
- ** 1382499 - reduce screen co-ordinate fingerprinting in Touch API (see 4611) (FF57+)
- ** 1217290 & 1409677 - enable fingerprinting resistance for WebGL (see 2010-12) (FF57+)
- ** 1382545 - reduce fingerprinting in Animation API (FF57+)
- ** 1354633 - limit MediaError.message to a whitelist (FF57+)
- ** 1382533 - enable fingerprinting resistance for Presentation API (FF57+)
- This blocks exposure of local IP Addresses via mDNS (Multicast DNS)
- ** 967895 - enable site permission prompt before allowing canvas data extraction (FF58+)
- FF59: Added to site permissions panel (1413780) Only prompt when triggered by user input (1376865)
- ** 1372073 - spoof/block fingerprinting in MediaDevices API (FF59+)
- Spoof: enumerate devices reports one "Internal Camera" and one "Internal Microphone" if
- media.navigator.enabled is true (see 2505 which we chose to keep disabled)
- Block: suppresses the ondevicechange event (see 4612)
- ** 1039069 - warn when language prefs are set to non en-US (see 0207, 0208) (FF59+)
- ** 1222285 & 1433592 - spoof keyboard events and suppress keyboard modifier events (FF59+)
- Spoofing mimics the content language of the document. Currently it only supports en-US.
- Modifier events suppressed are SHIFT and both ALT keys. Chrome is not affected.
- FF60: Fix keydown/keyup events (1438795)
- ** 1337157 - disable WebGL debug renderer info (see 4613) (FF60+)
- ** 1459089 - disable OS locale in HTTP Accept-Language headers (ANDROID) (FF62+)
- ** 1363508 - spoof/suppress Pointer Events (see 4614) (FF64+)
- FF65: pointerEvent.pointerid (1492766)
- ** 1485266 - disable exposure of system colors to CSS or canvas (see 2618) (FF67+)
- ** 1407366 - enable inner window letterboxing (see 4504) (FF67+)
- ** 1540726 - enforce "light" with prefers-color-scheme (FF67+)
- [1] https://developer.mozilla.org/en-US/docs/Web/CSS/@media/prefers-color-scheme
- ***/
- 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 is not ready for the masses, so expect some website breakage
- * [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", 1600); // [HIDDEN PREF]
- // user_pref("privacy.window.maxInnerHeight", 900); // [HIDDEN PREF]
- /* 4503: disable mozAddonManager Web API [FF57+]
- * [NOTE] As a side-effect in FF57-59 this allowed extensions to work on AMO. In FF60+ you also need
- * to sanitize or clear extensions.webextensions.restrictedDomains (see 2662) to keep that side-effect
- * [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 in 200w x100h steps by applying letterboxing, using dimensions
- * which waste the least content area, If you use the dimension pref, then it will only apply those
- * resolutions. The format is "width1xheight1, width2xheight2, ..." (e.g. "800x600, 1000x1000, 1600x900")
- * [NOTE] This does NOT require RFP (see 4501) **for now**
- * [WARNING] The dimension pref is only meant for testing, and we recommend you DO NOT USE it
- * [1] https://bugzilla.mozilla.org/1407366 ***/
- 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 (FF62+) this no longer masks the RFP chrome resizing activity
- * [1] https://bugzilla.mozilla.org/1448423 ***/
- user_pref("browser.startup.blankWindow", false);
- /*** [SECTION 4600]: RFP ALTERNATIVES
- * IF you DO use RFP (see 4500) then you DO NOT need these redundant prefs. In fact,
- some even cause RFP to not behave as you would expect and alter your fingerprint.
- Make sure they are RESET in about:config as per your Firefox version
- * IF you DO NOT use RFP or are on ESR... then turn on each ESR section below
- ***/
- 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://trac.torproject.org/projects/tor/ticket/21675
- // [3] https://trac.torproject.org/projects/tor/ticket/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://trac.torproject.org/projects/tor/ticket/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://trac.torproject.org/projects/tor/ticket/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://trac.torproject.org/projects/tor/ticket/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://trac.torproject.org/projects/tor/ticket/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);
- // * * * /
- // FF65+
- // 4614: [2516] disable PointerEvents
- // [1] https://developer.mozilla.org/en-US/docs/Web/API/PointerEvent
- user_pref("dom.w3c_pointer_events.enabled", false);
- // * * * /
- // ***/
- /*** [SECTION 4700]: RFP ALTERNATIVES (NAVIGATOR / USER AGENT (UA) SPOOFING)
- This is FYI ONLY. These prefs are INSUFFICIENT(a) on their own, you need
- to use RFP (4500) or an extension, in which case they become POINTLESS.
- (a) Many of the components that make up your UA can be derived by other means.
- And when those values differ, you provide more bits and raise entropy.
- Examples of leaks include navigator objects, date locale/formats, iframes,
- headers, tcp/ip attributes, feature detection, and **many** more.
- ALL values below intentionally left blank - use RFP, or get a vetted, tested
- extension and mimic RFP values to *lower* entropy, or randomize to *raise* it
- ***/
- user_pref("_user.js.parrot", "4700 syntax error: the parrot's taken 'is last bow");
- /* 4701: navigator.userAgent ***/
- // user_pref("general.useragent.override", ""); // [HIDDEN PREF]
- /* 4702: navigator.buildID
- * Revealed build time down to the second. In FF64+ it now returns a fixed timestamp
- * [1] https://bugzilla.mozilla.org/583181
- * [2] https://www.fxsitecompat.com/en-CA/docs/2018/navigator-buildid-now-returns-a-fixed-timestamp/ ***/
- // user_pref("general.buildID.override", ""); // [HIDDEN PREF]
- /* 4703: navigator.appName ***/
- // user_pref("general.appname.override", ""); // [HIDDEN PREF]
- /* 4704: navigator.appVersion ***/
- // user_pref("general.appversion.override", ""); // [HIDDEN PREF]
- /* 4705: navigator.platform ***/
- // user_pref("general.platform.override", ""); // [HIDDEN PREF]
- /* 4706: navigator.oscpu ***/
- // user_pref("general.oscpu.override", ""); // [HIDDEN PREF]
- /*** [SECTION 5000]: PERSONAL
- Non-project related but useful. If any of these interest you, add them to your overrides ***/
- user_pref("_user.js.parrot", "5000 syntax error: this is an ex-parrot!");
- /* WELCOME & WHAT's NEW NOTICES ***/
- // user_pref("browser.startup.homepage_override.mstone", "ignore"); // master switch
- // user_pref("startup.homepage_welcome_url", "");
- // user_pref("startup.homepage_welcome_url.additional", "");
- // user_pref("startup.homepage_override_url", ""); // What's New page after updates
- /* WARNINGS ***/
- // user_pref("browser.tabs.warnOnClose", false);
- // user_pref("browser.tabs.warnOnCloseOtherTabs", false);
- // user_pref("browser.tabs.warnOnOpen", false);
- // user_pref("full-screen-api.warning.delay", 0);
- // user_pref("full-screen-api.warning.timeout", 0);
- // user_pref("general.warnOnAboutConfig", false);
- /* APPEARANCE ***/
- // user_pref("browser.download.autohideButton", false); // [FF57+]
- // user_pref("toolkit.cosmeticAnimations.enabled", false); // [FF55+]
- /* CONTENT BEHAVIOR ***/
- // user_pref("accessibility.typeaheadfind", true); // enable "Find As You Type"
- // user_pref("clipboard.autocopy", false); // disable autocopy default [LINUX]
- // user_pref("layout.spellcheckDefault", 2); // 0=none, 1-multi-line, 2=multi-line & single-line
- /* UX BEHAVIOR ***/
- // user_pref("browser.backspace_action", 2); // 0=previous page, 1=scroll up, 2=do nothing
- // user_pref("browser.tabs.closeWindowWithLastTab", false);
- // user_pref("browser.tabs.loadBookmarksInTabs", true); // open bookmarks in a new tab [FF57+]
- // user_pref("browser.urlbar.decodeURLsOnCopy", true); // see bugzilla 1320061 [FF53+]
- // user_pref("general.autoScroll", false); // middle-click enabling auto-scrolling [WINDOWS] [MAC]
- // user_pref("ui.key.menuAccessKey", 0); // disable alt key toggling the menu bar [RESTART]
- /* OTHER ***/
- // user_pref("browser.bookmarks.max_backups", 2);
- // user_pref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr", false); // disable CFR [FF64+]
- // [SETTING] General>Browsing>Recommend extensions as you browse
- // [1] https://support.mozilla.org/en-US/kb/extension-recommendations
- // user_pref("identity.fxaccounts.enabled", false); // disable and hide Firefox Accounts and Sync [FF60+] [RESTART]
- // user_pref("network.manage-offline-status", false); // see bugzilla 620472
- // user_pref("reader.parse-on-load.enabled", false); // "Reader View"
- // user_pref("xpinstall.signatures.required", false); // enforced extension signing (Nightly/ESR)
- /*** [SECTION 9999]: DEPRECATED / REMOVED / LEGACY / RENAMED
- Documentation denoted as [-]. Numbers may be re-used. See [1] for a link-clickable,
- viewer-friendly version of the deprecated bugzilla tickets. The original state of each pref
- has been preserved, or changed to match the current setup, but you are advised to review them.
- [NOTE] Up to FF53, to enable a section change /* FFxx to // FFxx
- For FF53 on, we have bundled releases to cater for ESR. Change /* to // on the first line
- [1] https://github.com/ghacksuserjs/ghacks-user.js/issues/123
- ***/
- user_pref("_user.js.parrot", "9999 syntax error: the parrot's deprecated!");
- /* FF42 and older
- // 2604: (25+) disable page thumbnails - replaced by browser.pagethumbnails.capturing_disabled
- // [-] https://bugzilla.mozilla.org/897811
- user_pref("pageThumbs.enabled", false);
- // 2503: (31+) disable network API - replaced by dom.netinfo.enabled
- // [-] https://bugzilla.mozilla.org/960426
- user_pref("dom.network.enabled", false);
- // 2600's: (35+) disable WebSockets
- // [-] https://bugzilla.mozilla.org/1091016
- user_pref("network.websocket.enabled", false);
- // 1610: (36+) set DNT "value" to "not be tracked" [FF21+]
- // [1] http://kb.mozillazine.org/Privacy.donottrackheader.value
- // [-] https://bugzilla.mozilla.org/1042135#c101
- // user_pref("privacy.donottrackheader.value", 1);
- // 2023: (37+) disable camera autofocus callback
- // The API will be superseded by the WebRTC Capture and Stream API
- // [1] https://developer.mozilla.org/docs/Archive/B2G_OS/API/CameraControl
- // [-] https://bugzilla.mozilla.org/1107683
- user_pref("camera.control.autofocus_moving_callback.enabled", false);
- // 0415: (41+) disable reporting URLs (safe browsing) - removed or replaced by various
- // [-] https://bugzilla.mozilla.org/1109475
- user_pref("browser.safebrowsing.reportErrorURL", ""); // browser.safebrowsing.reportPhishMistakeURL
- user_pref("browser.safebrowsing.reportGenericURL", ""); // removed
- user_pref("browser.safebrowsing.reportMalwareErrorURL", ""); // browser.safebrowsing.reportMalwareMistakeURL
- user_pref("browser.safebrowsing.reportMalwareURL", ""); // removed
- user_pref("browser.safebrowsing.reportURL", ""); // removed
- // 0702: (41+) disable HTTP2 (draft)
- // [-] https://bugzilla.mozilla.org/1132357
- user_pref("network.http.spdy.enabled.http2draft", false);
- // 1804: (41+) disable plugin enumeration
- // [-] https://bugzilla.mozilla.org/1169945
- user_pref("plugins.enumerable_names", "");
- // 2803: (42+) clear passwords on shutdown
- // [-] https://bugzilla.mozilla.org/1102184
- // user_pref("privacy.clearOnShutdown.passwords", false);
- // 5002: (42+) disable warning when a domain requests full screen
- // replaced by setting full-screen-api.warning.timeout to zero
- // [-] https://bugzilla.mozilla.org/1160017
- // user_pref("full-screen-api.approval-required", false);
- // ***/
- /* FF43
- // 0410's: disable safebrowsing urls & updates - replaced by various
- // [-] https://bugzilla.mozilla.org/1107372
- // user_pref("browser.safebrowsing.gethashURL", ""); // browser.safebrowsing.provider.google.gethashURL
- // user_pref("browser.safebrowsing.updateURL", ""); // browser.safebrowsing.provider.google.updateURL
- user_pref("browser.safebrowsing.malware.reportURL", ""); // browser.safebrowsing.provider.google.reportURL
- // 0420's: disable tracking protection - replaced by various
- // [-] https://bugzilla.mozilla.org/1107372
- // user_pref("browser.trackingprotection.gethashURL", ""); // browser.safebrowsing.provider.mozilla.gethashURL
- // user_pref("browser.trackingprotection.updateURL", ""); // browser.safebrowsing.provider.mozilla.updateURL
- // 1803: remove plugin finder service
- // [1] http://kb.mozillazine.org/Pfs.datasource.url
- // [-] https://bugzilla.mozilla.org/1202193
- user_pref("pfs.datasource.url", "");
- // 5003: disable new search panel UI
- // [-] https://bugzilla.mozilla.org/1119250
- // user_pref("browser.search.showOneOffButtons", false);
- // ***/
- /* FF44
- // 0414: disable safebrowsing's real-time binary checking (google) [FF43+]
- // [-] https://bugzilla.mozilla.org/1237103
- user_pref("browser.safebrowsing.provider.google.appRepURL", ""); // browser.safebrowsing.appRepURL
- // 1200's: block rc4 whitelist
- // [-] https://bugzilla.mozilla.org/1215796
- user_pref("security.tls.insecure_fallback_hosts.use_static_list", false);
- // 2300's: disable SharedWorkers
- // [1] https://trac.torproject.org/projects/tor/ticket/15562
- // [-] https://bugzilla.mozilla.org/1207635
- user_pref("dom.workers.sharedWorkers.enabled", false);
- // 2403: disable scripts changing images
- // [TEST] https://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_img_src2
- // [-] https://bugzilla.mozilla.org/773429
- // user_pref("dom.disable_image_src_set", true);
- // ***/
- /* FF45
- // 1021b: disable deferred level of storing extra session data 0=all 1=http-only 2=none
- // extra session data contains contents of forms, scrollbar positions, cookies and POST data
- // [-] https://bugzilla.mozilla.org/1235379
- user_pref("browser.sessionstore.privacy_level_deferred", 2);
- // ***/
- /* FF46
- // 0340: disable health report
- // [-] https://bugzilla.mozilla.org/1234526
- user_pref("datareporting.healthreport.service.enabled", false); // [HIDDEN PREF]
- user_pref("datareporting.healthreport.documentServerURI", ""); // [HIDDEN PREF]
- // 0341: disable FHR (Firefox Health Report) v2 data being sent to Mozilla servers
- // [-] https://bugzilla.mozilla.org/1234522
- user_pref("datareporting.policy.dataSubmissionEnabled.v2", false);
- // 0414: disable safebrowsing pref - replaced by browser.safebrowsing.downloads.remote.url
- // [-] https://bugzilla.mozilla.org/1239587
- user_pref("browser.safebrowsing.appRepURL", ""); // Google application reputation check
- // 0420: disable polaris (part of Tracking Protection, never used in stable)
- // [-] https://bugzilla.mozilla.org/1235565
- // user_pref("browser.polaris.enabled", false);
- // 0510: disable "Pocket" [FF39+] - replaced by extensions.pocket.*
- // [-] https://bugzilla.mozilla.org/1215694
- user_pref("browser.pocket.enabled", false);
- user_pref("browser.pocket.api", "");
- user_pref("browser.pocket.site", "");
- user_pref("browser.pocket.oAuthConsumerKey", "");
- // ***/
- /* FF47
- // 0330b: set unifiedIsOptIn to make sure telemetry respects OptIn choice and that telemetry
- // is enabled ONLY for people that opted into it, even if unified Telemetry is enabled
- // [-] https://bugzilla.mozilla.org/1236580
- user_pref("toolkit.telemetry.unifiedIsOptIn", true); // [HIDDEN PREF]
- // 0340b: disable about:healthreport page UNIFIED
- // [-] https://bugzilla.mozilla.org/1236580
- user_pref("datareporting.healthreport.about.reportUrlUnified", "data:text/plain,");
- // 0807: disable history manipulation
- // [1] https://developer.mozilla.org/docs/Web/API/History_API
- // [-] https://bugzilla.mozilla.org/1249542
- user_pref("browser.history.allowPopState", false);
- user_pref("browser.history.allowPushState", false);
- user_pref("browser.history.allowReplaceState", false);
- // ***/
- /* FF48
- // 0806: disable 'unified complete': 'Search with [default search engine]'
- // [-] http://techdows.com/2016/05/firefox-unified-complete-aboutconfig-preference-removed.html
- // [-] https://bugzilla.mozilla.org/1181078
- user_pref("browser.urlbar.unifiedcomplete", false);
- // ***/
- /* FF49
- // 0372: disable "Hello"
- // [1] https://www.mozilla.org/privacy/archive/hello/2016-03/
- // [2] https://security.stackexchange.com/questions/94284/how-secure-is-firefox-hello
- // [-] https://bugzilla.mozilla.org/1287827
- user_pref("loop.enabled", false);
- user_pref("loop.server", "");
- user_pref("loop.feedback.formURL", "");
- user_pref("loop.feedback.manualFormURL", "");
- user_pref("loop.facebook.appId", "");
- user_pref("loop.facebook.enabled", false);
- user_pref("loop.facebook.fallbackUrl", "");
- user_pref("loop.facebook.shareUrl", "");
- user_pref("loop.logDomains", false);
- // 2201: disable new window scrollbars being hidden
- // [-] https://bugzilla.mozilla.org/1257887
- user_pref("dom.disable_window_open_feature.scrollbars", true);
- // 2303: disable push notification (UDP wake-up)
- // [-] https://bugzilla.mozilla.org/1265914
- user_pref("dom.push.udp.wakeupEnabled", false);
- // ***/
- /* FF50
- // 0101: disable Windows10 intro on startup [WINDOWS]
- // [-] https://bugzilla.mozilla.org/1274633
- user_pref("browser.usedOnWindows10.introURL", "");
- // 0308: disable plugin update notifications
- // [-] https://bugzilla.mozilla.org/1277905
- user_pref("plugins.update.notifyUser", false);
- // 0410: disable "Block dangerous and deceptive content" - replaced by browser.safebrowsing.phishing.enabled
- // [-] https://bugzilla.mozilla.org/1025965
- // user_pref("browser.safebrowsing.enabled", false);
- // 1266: disable rc4 ciphers
- // [1] https://trac.torproject.org/projects/tor/ticket/17369
- // [-] https://bugzilla.mozilla.org/1268728
- // [-] https://www.fxsitecompat.com/en-CA/docs/2016/rc4-support-has-been-completely-removed/
- user_pref("security.ssl3.ecdhe_ecdsa_rc4_128_sha", false);
- user_pref("security.ssl3.ecdhe_rsa_rc4_128_sha", false);
- user_pref("security.ssl3.rsa_rc4_128_md5", false);
- user_pref("security.ssl3.rsa_rc4_128_sha", false);
- // 1809: remove Mozilla's plugin update URL
- // [-] https://bugzilla.mozilla.org/1277905
- user_pref("plugins.update.url", "");
- // ***/
- /* FF51
- // 0702: disable SPDY
- // [-] https://bugzilla.mozilla.org/1248197
- user_pref("network.http.spdy.enabled.v3-1", false);
- // 1851: delay play of videos until they're visible
- // [1] https://bugzilla.mozilla.org/1180563
- // [-] https://bugzilla.mozilla.org/1262053
- user_pref("media.block-play-until-visible", true);
- // 2504: disable virtual reality devices
- // [-] https://bugzilla.mozilla.org/1250244
- user_pref("dom.vr.oculus050.enabled", false);
- // ***/
- /* FF52
- // 1601: disable referer from an SSL Website
- // [-] https://bugzilla.mozilla.org/1308725
- user_pref("network.http.sendSecureXSiteReferrer", false);
- // 1850: disable Adobe EME "Primetime CDM" (Content Decryption Module)
- // [1] https://trac.torproject.org/projects/tor/ticket/16285
- // [-] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1329538,1337121 // FF52
- // [-] https://bugzilla.mozilla.org/1329543 // FF53
- user_pref("media.gmp-eme-adobe.enabled", false);
- user_pref("media.gmp-eme-adobe.visible", false);
- user_pref("media.gmp-eme-adobe.autoupdate", false);
- // 2405: disable WebTelephony API
- // [1] https://wiki.mozilla.org/WebAPI/Security/WebTelephony
- // [-] https://bugzilla.mozilla.org/1309719
- user_pref("dom.telephony.enabled", false);
- // ***/
- /* FF53
- // 1265: block rc4 fallback
- // [-] https://bugzilla.mozilla.org/1130670
- user_pref("security.tls.unrestricted_rc4_fallback", false);
- // 1806: disable Acrobat, Quicktime, WMP (the string = min version number allowed)
- // [-] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1317108,1317109,1317110
- user_pref("plugin.scan.Acrobat", "99999");
- user_pref("plugin.scan.Quicktime", "99999");
- user_pref("plugin.scan.WindowsMediaPlayer", "99999");
- // 2022: disable screensharing
- // [-] https://bugzilla.mozilla.org/1329562
- user_pref("media.getusermedia.screensharing.allow_on_old_platforms", false);
- // 2507: disable keyboard fingerprinting
- // [-] https://bugzilla.mozilla.org/1322736
- user_pref("dom.beforeAfterKeyboardEvent.enabled", false);
- // ***/
- /* FF54
- // 0415: disable reporting URLs (safe browsing)
- // [-] https://bugzilla.mozilla.org/1288633
- user_pref("browser.safebrowsing.reportMalwareMistakeURL", "");
- user_pref("browser.safebrowsing.reportPhishMistakeURL", "");
- // 1830: block websites detecting DRM is disabled
- // [-] https://bugzilla.mozilla.org/1242321
- user_pref("media.eme.apiVisible", false);
- // 2425: disable Archive Reader API
- // i.e. reading archive contents directly in the browser, through DOM file objects
- // [-] https://bugzilla.mozilla.org/1342361
- user_pref("dom.archivereader.enabled", false);
- // ***/
- /* FF55
- // 0209: disable geolocation on non-secure origins [FF54+]
- // [1] https://bugzilla.mozilla.org/1269531
- // [-] https://bugzilla.mozilla.org/1072859
- user_pref("geo.security.allowinsecure", false);
- // 0336: disable "Heartbeat" (Mozilla user rating telemetry) [FF37+]
- // [1] https://trac.torproject.org/projects/tor/ticket/18738
- // [-] https://bugzilla.mozilla.org/1361578
- user_pref("browser.selfsupport.enabled", false); // [HIDDEN PREF]
- user_pref("browser.selfsupport.url", "");
- // 0360: disable new tab "pings"
- // [-] https://bugzilla.mozilla.org/1241390
- user_pref("browser.newtabpage.directory.ping", "data:text/plain,");
- // 0861: disable saving form history on secure websites
- // [-] https://bugzilla.mozilla.org/1361220
- user_pref("browser.formfill.saveHttpsForms", false);
- // 0863: disable Form Autofill [FF54+] - replaced by extensions.formautofill.*
- // [-] https://bugzilla.mozilla.org/1364334
- user_pref("browser.formautofill.enabled", false);
- // 2410: disable User Timing API
- // [1] https://trac.torproject.org/projects/tor/ticket/16336
- // [-] https://bugzilla.mozilla.org/1344669
- user_pref("dom.enable_user_timing", false);
- // 2507: disable keyboard fingerprinting (physical keyboards) [FF38+]
- // The Keyboard API allows tracking the "read parameter" of pressed keys in forms on
- // web pages. These parameters vary between types of keyboard layouts such as QWERTY,
- // AZERTY, Dvorak, and between various languages, e.g. German vs English.
- // [WARNING] Don't use if Android + physical keyboard
- // [1] https://developer.mozilla.org/docs/Web/API/KeyboardEvent/code
- // [2] https://www.privacy-handbuch.de/handbuch_21v.htm
- // [-] https://bugzilla.mozilla.org/1352949
- user_pref("dom.keyboardevent.code.enabled", false);
- // 5015: disable tab animation - replaced by toolkit.cosmeticAnimations.enabled
- // [-] https://bugzilla.mozilla.org/1352069
- user_pref("browser.tabs.animate", false);
- // 5016: disable fullscreeen animation - replaced by toolkit.cosmeticAnimations.enabled
- // [-] https://bugzilla.mozilla.org/1352069
- user_pref("browser.fullscreen.animate", false);
- // ***/
- /* FF56
- // 0515: disable Screenshots (rollout pref only) [FF54+]
- // [-] https://bugzilla.mozilla.org/1386333
- // user_pref("extensions.screenshots.system-disabled", true);
- // 0517: disable Form Autofill [FF55+] - replaced by extensions.formautofill.available
- // [-] https://bugzilla.mozilla.org/1385201
- user_pref("extensions.formautofill.experimental", false);
- // ***/
- /* FF57
- // 0374: disable "social" integration
- // [1] https://developer.mozilla.org/docs/Mozilla/Projects/Social_API
- // [-] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1388902,1406193 (some leftovers were removed in FF58)
- user_pref("social.whitelist", "");
- user_pref("social.toast-notifications.enabled", false);
- user_pref("social.shareDirectory", "");
- user_pref("social.remote-install.enabled", false);
- user_pref("social.directories", "");
- user_pref("social.share.activationPanelEnabled", false);
- user_pref("social.enabled", false); // [HIDDEN PREF]
- // 1830: disable DRM's EME WideVineAdapter [FF55+]
- // [-] https://bugzilla.mozilla.org/1395468
- user_pref("media.eme.chromium-api.enabled", false);
- // 2608: disable WebIDE extension downloads (Valence)
- // [1] https://trac.torproject.org/projects/tor/ticket/16222
- // [-] https://bugzilla.mozilla.org/1393497
- user_pref("devtools.webide.autoinstallFxdtAdapters", false);
- user_pref("devtools.webide.adaptersAddonURL", "");
- // 2600's: disable SimpleServiceDiscovery - which can bypass proxy settings - e.g. Roku
- // [1] https://trac.torproject.org/projects/tor/ticket/16222
- // [-] https://bugzilla.mozilla.org/1393582
- user_pref("browser.casting.enabled", false);
- // 5022: hide recently bookmarked items (you still have the original bookmarks) [FF49+]
- // [-] https://bugzilla.mozilla.org/1401238
- user_pref("browser.bookmarks.showRecentlyBookmarked", false);
- // ***/
- /* FF58
- // 0351: disable sending of crash reports [FF51+] - replaced by *.autoSubmit2
- // [-] https://bugzilla.mozilla.org/1424373
- user_pref("browser.crashReports.unsubmittedCheck.autoSubmit", false);
- // ***/
- /* FF59
- // 0203: disable using OS locale, force APP locale - replaced by intl.locale.requested
- // [-] https://bugzilla.mozilla.org/1414390
- user_pref("intl.locale.matchOS", false);
- // 0204: set APP locale - replaced by intl.locale.requested
- // [-] https://bugzilla.mozilla.org/1414390
- user_pref("general.useragent.locale", "en-US");
- // 0340b: disable about:healthreport page (which connects to Mozilla for locale/css+js+json)
- // If you have disabled health reports, then this about page is useless - disable it
- // If you want to see what health data is present, then this must be set at default
- // [-] https://bugzilla.mozilla.org/1352497
- user_pref("datareporting.healthreport.about.reportUrl", "data:,");
- // 0511: disable FlyWeb [FF49+]
- // Flyweb is a set of APIs for advertising and discovering local-area web servers
- // [1] https://flyweb.github.io/
- // [2] https://wiki.mozilla.org/FlyWeb/Security_scenarios
- // [3] https://www.ghacks.net/2016/07/26/firefox-flyweb/
- // [-] https://bugzilla.mozilla.org/1374574
- user_pref("dom.flyweb.enabled", false);
- // 1007: disable randomized FF HTTP cache decay experiments
- // [1] https://trac.torproject.org/projects/tor/ticket/13575
- // [-] https://bugzilla.mozilla.org/1430197
- user_pref("browser.cache.frecency_experiment", -1);
- // 1242: enable Mixed-Content-Blocker to use the HSTS cache but disable the HSTS Priming requests [FF51+]
- // Allow resources from domains with an existing HSTS cache record or in the HSTS preload list
- // to be upgraded to HTTPS internally but disable sending out HSTS Priming requests, because
- // those may cause noticeable delays e.g. requests time out or are not handled well by servers
- // [NOTE] If you want to use the priming requests make sure 'use_hsts' is also true
- // [1] https://bugzilla.mozilla.org/1246540#c145
- // [-] https://bugzilla.mozilla.org/1424917
- user_pref("security.mixed_content.use_hsts", true);
- user_pref("security.mixed_content.send_hsts_priming", false);
- // 1606: set the default Referrer Policy [FF53+] - replaced by network.http.referer.defaultPolicy
- // [-] https://bugzilla.mozilla.org/587523
- user_pref("network.http.referer.userControlPolicy", 3);
- // 1804: disable plugins using external/untrusted scripts with XPCOM or XPConnect
- // [-] (part8) https://bugzilla.mozilla.org/1416703#c21
- user_pref("security.xpconnect.plugin.unrestricted", false);
- // 2022: disable screensharing domain whitelist
- // [-] https://bugzilla.mozilla.org/1411742
- user_pref("media.getusermedia.screensharing.allowed_domains", "");
- // 2023: disable camera stuff
- // [-] (part7) https://bugzilla.mozilla.org/1416703#c21
- user_pref("camera.control.face_detection.enabled", false);
- // 2202: prevent scripts from changing the status text
- // [-] https://bugzilla.mozilla.org/1425999
- user_pref("dom.disable_window_status_change", true);
- // 2416: disable idle observation
- // [-] (part7) https://bugzilla.mozilla.org/1416703#c21
- user_pref("dom.idle-observers-api.enabled", false);
- // ***/
- /* FF60
- // 0360: disable new tab tile ads & preload & marketing junk
- // [-] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1370930,1433133
- user_pref("browser.newtabpage.directory.source", "data:text/plain,");
- user_pref("browser.newtabpage.enhanced", false);
- user_pref("browser.newtabpage.introShown", true);
- // 0512: disable Shield [FF53+] - renamed to app.normandy.* (see 0503)
- // 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
- // [-] https://bugzilla.mozilla.org/1436113
- user_pref("extensions.shield-recipe-client.enabled", false);
- user_pref("extensions.shield-recipe-client.api_url", "");
- // 0514: disable Activity Stream [FF54+]
- // [-] https://bugzilla.mozilla.org/1433324
- user_pref("browser.newtabpage.activity-stream.enabled", false);
- // 2301: disable workers
- // [SETUP-WEB] Disabling workers *will* break sites (e.g. Google Street View, Twitter)
- // [NOTE] CVE-2016-5259, CVE-2016-2812, CVE-2016-1949, CVE-2016-5287 (fixed)
- // [-] https://bugzilla.mozilla.org/1434934
- user_pref("dom.workers.enabled", false);
- // 5000's: open "page/selection source" in a new window
- // [-] https://bugzilla.mozilla.org/1418403
- // user_pref("view_source.tab", false);
- // ***/
- /* ESR60.x still uses all the following prefs
- // [NOTE] replace the * with a slash in the line above to re-enable them
- // FF61
- // 0501: disable experiments
- // [1] https://wiki.mozilla.org/Telemetry/Experiments
- // [-] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1420908,1450801
- user_pref("experiments.enabled", false);
- user_pref("experiments.manifest.uri", "");
- user_pref("experiments.supported", false);
- user_pref("experiments.activeExperiment", false);
- // 2612: disable remote JAR files being opened, regardless of content type [FF42+]
- // [1] https://bugzilla.mozilla.org/1173171
- // [2] https://www.fxsitecompat.com/en-CA/docs/2015/jar-protocol-support-has-been-disabled-by-default/
- // [-] https://bugzilla.mozilla.org/1427726
- user_pref("network.jar.block-remote-files", true);
- // 2613: disable JAR from opening Unsafe File Types
- // [-] https://bugzilla.mozilla.org/1427726
- user_pref("network.jar.open-unsafe-types", false);
- // * * * /
- // FF62
- // 1803: disable Java plugin
- // [-] (part5) https://bugzilla.mozilla.org/1461243
- user_pref("plugin.state.java", 0);
- // * * * /
- // FF63
- // 0202: disable GeoIP-based search results
- // [NOTE] May not be hidden if Firefox has changed your settings due to your locale
- // [-] https://bugzilla.mozilla.org/1462015
- user_pref("browser.search.countryCode", "US"); // [HIDDEN PREF]
- // 0301a: disable auto-update checks for Firefox
- // [SETTING] General>Firefox Updates>Never check for updates
- // [-] https://bugzilla.mozilla.org/1420514
- // user_pref("app.update.enabled", false);
- // 0402: enable Kinto blocklist updates [FF50+]
- // What is Kinto?: https://wiki.mozilla.org/Firefox/Kinto#Specifications
- // As Firefox transitions to Kinto, the blocklists have been broken down into entries for certs to be
- // revoked, extensions and plugins to be disabled, and gfx environments that cause problems or crashes
- // [-] https://bugzilla.mozilla.org/1458917
- user_pref("services.blocklist.update_enabled", true); // [DEFAULT: true]
- // 0503: disable "Savant" Shield study [FF61+]
- // [-] https://bugzilla.mozilla.org/1457226
- user_pref("shield.savant.enabled", false);
- // 1031: disable favicons in tabs and new bookmarks - merged into browser.chrome.site_icons
- // [-] https://bugzilla.mozilla.org/1453751
- // user_pref("browser.chrome.favicons", false);
- // 2030: disable autoplay of HTML5 media - replaced by media.autoplay.default
- // [SETUP-WEB] This may break video playback on various sites
- // [-] https://bugzilla.mozilla.org/1470082
- user_pref("media.autoplay.enabled", false);
- // 2704: set cookie lifetime in days (see 2703)
- // [-] https://bugzilla.mozilla.org/1457170
- // user_pref("network.cookie.lifetime.days", 90); // [DEFAULT: 90]
- // 5000's: enable "Ctrl+Tab cycles through tabs in recently used order" - replaced by browser.ctrlTab.recentlyUsedOrder
- // [-] https://bugzilla.mozilla.org/1473595
- // user_pref("browser.ctrlTab.previews", true);
- // * * * /
- // FF64
- // 0516: disable Onboarding [FF55+]
- // Onboarding is an interactive tour/setup for new installs/profiles and features. Every time
- // about:home or about:newtab is opened, the onboarding overlay is injected into that page
- // [NOTE] Onboarding uses Google Analytics [2], and leaks resource://URIs [3]
- // [1] https://wiki.mozilla.org/Firefox/Onboarding
- // [2] https://github.com/mozilla/onboard/commit/db4d6c8726c89a5d6a241c1b1065827b525c5baf
- // [3] https://bugzilla.mozilla.org/863246#c154
- // [-] https://bugzilla.mozilla.org/1462415
- user_pref("browser.onboarding.enabled", false);
- // 2608: disable WebIDE ADB extension downloads - both renamed
- // [1] https://trac.torproject.org/projects/tor/ticket/16222
- // [-] https://bugzilla.mozilla.org/1491315
- user_pref("devtools.webide.autoinstallADBHelper", false);
- user_pref("devtools.webide.adbAddonURL", "");
- // 2681: disable CSP violation events [FF59+]
- // [1] https://developer.mozilla.org/docs/Web/API/SecurityPolicyViolationEvent
- // [-] https://bugzilla.mozilla.org/1488165
- user_pref("security.csp.enable_violation_events", false);
- // * * * /
- // FF65
- // 0850a: disable location bar autocomplete and suggestion types
- // If you enforce any of the suggestion types (see the other 0850a), you MUST enforce 'autocomplete'
- // - If *ALL* of the suggestion types are false, 'autocomplete' must also be false
- // - If *ANY* of the suggestion types are true, 'autocomplete' must also be true
- // [-] https://bugzilla.mozilla.org/1502392
- user_pref("browser.urlbar.autocomplete.enabled", false);
- // 0908: remove user & password info when attempting to fix an entered URL (i.e. 0802 is true)
- // e.g. //user:password@foo -> //user@(prefix)foo(suffix) NOT //user:password@(prefix)foo(suffix)
- // [-] https://bugzilla.mozilla.org/1510580
- user_pref("browser.fixup.hide_user_pass", true); // [DEFAULT: true]
- // * * * /
- // FF66
- // 0380: disable Browser Error Reporter [FF60+]
- // [1] https://support.mozilla.org/en-US/kb/firefox-nightly-error-collection
- // [2] https://firefox-source-docs.mozilla.org/browser/browser/BrowserErrorReporter.html
- // [-] https://bugzilla.mozilla.org/1509888
- user_pref("browser.chrome.errorReporter.enabled", false);
- user_pref("browser.chrome.errorReporter.submitUrl", "");
- // 0502: disable Mozilla permission to silently opt you into tests
- // [-] https://bugzilla.mozilla.org/1415625
- user_pref("network.allow-experiments", false);
- // * * * /
- // ***/
- /* 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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