// // ********************************************************************************** // user.js | Firefox mobile // // https://git.nixnet.xyz/Narsil/mobile_user.js // ********************************************************************************** // // Author : Narsil : https://git.nixnet.xyz/Narsil // // // // Based on : arkenfox : https://github.com/arkenfox/user.js // : Quindecim : https://git.nixnet.xyz/quindecim/mobile_user.js // // // License : https://git.nixnet.xyz/Narsil/desktop_user.js/raw/branch/master/LICENSE // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // STARTUP // >>>>>>>>>>>>>>>>>>>>> // Disable about:config warning // FF71-72: chrome://global/content/config.xul // FF73+: chrome://global/content/config.xhtml user_pref("general.warnOnAboutConfig", false); // XHTML version user_pref("browser.aboutConfig.showWarning", false); // HTML version [FF71+] // ------------------------------------- // Disable separate about:welcome page // https://bugzilla.mozilla.org/show_bug.cgi?id=1617783 user_pref("browser.aboutwelcome.enabled", false); user_pref("trailhead.firstrun.branches", ""); // ------------------------------------- // Disable default browser check // [SETTING] General>Startup>Always check if Firefox is your default browser user_pref("browser.shell.checkDefaultBrowser", false); // ------------------------------------- // Set START page // 0=blank, 1=home, 2=last visited page, 3=resume previous session // [NOTE] Session Restore is not used in PB mode and is cleared with history // [SETTING] General>Startup>Restore previous session user_pref("browser.startup.page", 0); // ------------------------------------- // Set HOME+NEWWINDOW page // about:home=Activity Stream (default), custom URL, about:blank // [SETTING] Home>New Windows and Tabs>Homepage and new windows user_pref("browser.startup.homepage", "about:blank"); // ------------------------------------- // Set NEWTAB page // true=Activity Stream (default), false=blank page // [SETTING] Home>New Windows and Tabs>New tabs user_pref("browser.newtabpage.enabled", false); user_pref("browser.newtab.preload", false); // ------------------------------------- // 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.showSearch", false); user_pref("browser.newtabpage.activity-stream.feeds.topsites", false); user_pref("browser.newtabpage.activity-stream.feeds.section.highlights", false); user_pref("browser.newtabpage.activity-stream.feeds.favicon", false); user_pref("browser.newtabpage.activity-stream.discoverystream.enabled", false); user_pref("browser.newtabpage.activity-stream.discoverystream.endpoints", ""); user_pref("browser.newtabpage.activity-stream.telemetry.structuredIngestion.endpoint", ""); user_pref("browser.newtabpage.activity-stream.improvesearch.topSiteSearchShortcuts.havePinned", ""); user_pref("browser.newtabpage.activity-stream.fxaccounts.endpoint", ""); // ------------------------------------- // Disable Activity Stream Snippets // Runs code received from a server (aka Remote Code Execution) and sends information back to a metrics server // https://abouthome-snippets-service.readthedocs.io/ user_pref("browser.newtabpage.activity-stream.feeds.snippets", false) // [DEFAULT: false FF89+] user_pref("browser.newtabpage.activity-stream.asrouter.providers.snippets", ""); // ------------------------------------- // 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+] user_pref("browser.newtabpage.activity-stream.showSponsoredTopSites", false); // [FF83+] // ------------------------------------- // Clear default topsites // [NOTE] This does not block you from adding your own user_pref("browser.newtabpage.activity-stream.default.sites", ""); // ------------------------------------- // Start Firefox in PB (Private Browsing) mode // https://wiki.mozilla.org/Private_Browsing // https://spreadprivacy.com/is-private-browsing-really-private/ // user_pref("browser.privatebrowsing.autostart", true); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // GEOLOCATION // >>>>>>>>>>>>>>>>>>>>> // Disable Location-Aware Browsing // [NOTE] Best left at default "true", fingerprintable, already behind a prompt // https://www.mozilla.org/firefox/geolocation/ user_pref("geo.enabled", false); user_pref("browser.search.geoip.url", ""); // [HIDDEN PREF] // ------------------------------------- // 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: Ctrl+I>Permissions>Access Your Location // [SETTING] to manage site exceptions: Options>Privacy & Security>Permissions>Location>Settings // user_pref("permissions.default.geo", 2); // ------------------------------------- // Use Mozilla geolocation service instead of Google when geolocation is enabled [FF74+] // Optionally enable logging to the console (defaults to false) user_pref("geo.provider.network.url", ""); // user_pref("geo.provider.network.logging.enabled", true); // [HIDDEN PREF] // ------------------------------------- // 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] // ------------------------------------- // Disable region updates // https://firefox-source-docs.mozilla.org/toolkit/modules/toolkit_modules/Region.html user_pref("browser.region.network.url", ""); // [FF78+] user_pref("browser.region.update.enabled", false); // [[FF79+] // ------------------------------------- // Set search region // May not be hidden if Firefox has changed your settings due to your region user_pref("browser.search.region", "en-US, en"); // [HIDDEN PREF] // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // LANGUAGE / LOCALE // >>>>>>>>>>>>>>>>>>>>> // Set preferred language for displaying web pages // https://addons.mozilla.org/about ***/ user_pref("intl.accept_languages", "en-US"); // ------------------------------------- // Use US English locale regardless of the system locale // [SETUP-WEB] May break some input methods e.g xim/ibus for CJK languages // https://bugzilla.mozilla.org/buglist.cgi?bug_id=867501,1629630 user_pref("javascript.use_us_english_locale", true); // [HIDDEN PREF] user_pref("intl.locale.requested", "en-US"); user_pref("privacy.spoof_english", 2); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // QUIET FOX // >>>>>>>>>>>>>>>>>>>>> // Disable auto-CHECKING for extension and theme updates user_pref("extensions.update.enabled", true); user_pref("extensions.autoupdate.enabled", true); // ------------------------------------- // Decrease system information leakage to Mozilla extensions update servers user_pref("extensions.update.url", "https://versioncheck.addons.mozilla.org/update/VersionCheck.php?reqVersion=%REQ_VERSION%&id=%ITEM_ID%&version=%ITEM_VERSION%&maxAppVersion=%ITEM_MAXAPPVERSION%&status=%ITEM_STATUS%&appID=%APP_ID%&appVersion=%APP_VERSION%&appOS=%APP_OS%&appABI=%APP_ABI%&locale=en-US¤tAppVersion=%CURRENT_APP_VERSION%&updateType=%UPDATE_TYPE%&compatMode=%COMPATIBILITY_MODE%"); // [URL SANITIZED] user_pref("extensions.update.background.url", "https://versioncheck-bg.addons.mozilla.org/update/VersionCheck.php?reqVersion=%REQ_VERSION%&id=%ITEM_ID%&version=%ITEM_VERSION%&maxAppVersion=%ITEM_MAXAPPVERSION%&status=%ITEM_STATUS%&appID=%APP_ID%&appVersion=%APP_VERSION%&appOS=%APP_OS%&appABI=%APP_ABI%&locale=en-US¤tAppVersion=%CURRENT_APP_VERSION%&updateType=%UPDATE_TYPE%&compatMode=%COMPATIBILITY_MODE%"); // [URL SANITIZED] // ------------------------------------- // Pref : Decrease system information leakage to Mozilla addons update servers user_pref("extensions.getAddons.browseAddons", "https://addons.mozilla.org/en-US/android/collections/4757633/mob/?page=1&collection_sort=-popularity"); // [URL SANITIZED] user_pref("extensions.getAddons.get.url", "https://services.addons.mozilla.org/api/v4/addons/search/?guid=%IDS%&lang=en-US"); // [URL SANITIZED] user_pref("extensions.getAddons.search.browseURL", "https://addons.mozilla.org/en-US/android/search?q=%TERMS%&platform=%OS%&appver=%VERSION%"); // [URL SANITIZED] // ------------------------------------- // 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 to install them user_pref("app.update.auto", false); user_pref("app.update.staging.enabled", false); // ------------------------------------- // Disable add-on and certificate blocklists (OneCRL) from Mozilla user_pref("extensions.blocklist.enabled", false); user_pref("extensions.blocklist.detailsURL", ""); user_pref("extensions.blocklist.url", ""); user_pref("services.blocklist.addons.collection", ""); user_pref("services.blocklist.plugins.collection", ""); user_pref("services.blocklist.pinning.collection", ""); user_pref("services.blocklist.gfx.collection", ""); user_pref("extensions.blocklist.itemURL", ""); user_pref("services.settings.security.onecrl.bucket", ""); user_pref("services.settings.security.onecrl.collection", ""); user_pref("services.settings.security.onecrl.signer", ""); // ------------------------------------- // Disable auto-INSTALLING extension and theme updates // [SETTING] about:addons>Extensions>[cog-wheel-icon]>Update Add-ons Automatically (toggle) user_pref("extensions.update.autoUpdateDefault", false); // ------------------------------------- // Disable auto-INSTALLING Firefox updates via a background service [FF90+] [WINDOWS] // [SETTING] General>Firefox Updates>Automatically install updates>When Firefox is not running // https://support.mozilla.org/kb/enable-background-updates-firefox-windows ***/ user_pref("app.update.background.scheduling.enabled", false); // ------------------------------------- // Disable extension metadata // used when installing/updating an extension, and in daily background update checks: // when false, extension detail tabs will have no description user_pref("extensions.getAddons.cache.enabled", false); user_pref("extensions.getAddons.discovery.api_url", ""); // ------------------------------------ // Disable connections to Mozilla servers user_pref("services.settings.server", ""); // ------------------------------------- // Disable search engine updates (e.g. OpenSearch) // This does not affect Mozilla's built-in or Web Extension search engines user_pref("browser.search.update", false); user_pref("browser.search.update.log", false); // ------------------------------------- // Disable about:addons' Recommendations pane (uses Google Analytics) user_pref("extensions.getAddons.showPane", false); // [HIDDEN PREF] // ------------------------------------- // Disable recommendations in about:addons' Extensions and Themes panes [FF68+] user_pref("extensions.htmlaboutaddons.recommendations.enabled", false); // ------------------------------------- // Disable telemetry // https://firefox-source-docs.mozilla.org/toolkit/components/telemetry/telemetry/internals/preferences.html // https://medium.com/georg-fritzsche/data-preference-changes-in-firefox-58-2d5df9c428b5 ***/ user_pref("toolkit.telemetry.unified", false); user_pref("toolkit.telemetry.enabled", false); user_pref("toolkit.telemetry.server", ""); user_pref("toolkit.telemetry.archive.enabled", false); 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.crashreporter.infoURL", ""); user_pref("security.protectionspopup.recordEventTelemetry", false); // ------------------------------------- // Disable collect Telemetry on tracking resources traffic. // An experiment that analyses HTTP traffic and will run at most until Firefox 73, looking for the prevalence of tracking resources going through HTTP. // https://bugzilla.mozilla.org/show_bug.cgi?id=1533363 user_pref("network.traffic_analyzer.enabled", false); // ------------------------------------- // Disable Telemetry Coverage // 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", ""); user_pref("toolkit.coverage.enabled", false); // ------------------------------------- // Disable Health Reports // [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to send technical... data user_pref("datareporting.healthreport.uploadEnabled", false); // ------------------------------------- // Disable new data submission, master kill switch [FF41+] // If disabled, no policy is shown or upload takes place, ever // https://bugzilla.mozilla.org/1195552 user_pref("datareporting.policy.dataSubmissionEnabled", false); user_pref("datareporting.policy.firstRunURL", ""); // ------------------------------------- // Disable Studies (see 0503) // [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to install and run studies user_pref("app.shield.optoutstudies.enabled", false); // ------------------------------------- // Disable personalized Extension Recommendations in about:addons and AMO [FF65+] // This pref has no effect when Health Reports are disabled // Privacy & Security>Firefox Data Collection & Use>Allow Firefox to make personalized extension recommendations // https://support.mozilla.org/kb/personalized-extension-recommendations user_pref("browser.discovery.enabled", false); user_pref("browser.discovery.containers.enabled", false); user_pref("browser.discovery.sites", ""); // ------------------------------------- // Disable Crash Reports user_pref("breakpad.reportURL", ""); user_pref("browser.tabs.crashReporting.sendReport", false); // [FF44+] user_pref("browser.crashReports.unsubmittedCheck.enabled", false); // [FF51+] [DEFAULT: false] // ------------------------------------- // Enforce no submission of backlogged Crash Reports [FF58+] // [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to send backlogged crash reports user_pref("browser.crashReports.unsubmittedCheck.autoSubmit2", false); // [DEFAULT: false] // ------------------------------------- // Disable Captive Portal detection // https://www.eff.org/deeplinks/2017/08/how-captive-portals-interfere-wireless-security-and-privacy // https://wiki.mozilla.org/Necko/CaptivePortal user_pref("captivedetect.canonicalURL", ""); user_pref("network.captive-portal-service.enabled", false); // [FF52+] // ------------------------------------- // Disable Network Connectivity checks [FF65+] // https://bugzilla.mozilla.org/1460537 user_pref("network.connectivity-service.enabled", false); user_pref("network.connectivity-service.IPv6.url", "http://0.0.0.0"); user_pref("network.connectivity-service.IPv4.url", "http://0.0.0.0"); user_pref("network.connectivity-service.DNSv6.domain", ""); user_pref("network.connectivity-service.DNSv4.domain", ""); // ------------------------------------- // Disable contentblocking reports user_pref("browser.contentblocking.reportBreakage.url", ""); user_pref("browser.contentblocking.report.cookie.url", ""); user_pref("browser.contentblocking.report.cryptominer.url", ""); user_pref("browser.contentblocking.report.fingerprinter.url", ""); user_pref("browser.contentblocking.report.lockwise.enabled", false); user_pref("browser.contentblocking.report.lockwise.how_it_works.url", ""); user_pref("browser.contentblocking.report.manage_devices.url", ""); user_pref("browser.contentblocking.report.monitor.enabled", false); user_pref("browser.contentblocking.report.monitor.how_it_works.url", ""); user_pref("browser.contentblocking.report.monitor.sign_in_url", ""); user_pref("browser.contentblocking.report.monitor.url", ""); user_pref("browser.contentblocking.report.proxy.enabled", false); user_pref("browser.contentblocking.report.proxy_extension.url", ""); user_pref("browser.contentblocking.report.social.url", ""); user_pref("browser.contentblocking.report.tracker.url", ""); user_pref("browser.contentblocking.report.endpoint_url", ""); user_pref("browser.contentblocking.report.monitor.home_page_url", ""); user_pref("browser.contentblocking.report.monitor.preferences_url", ""); user_pref("browser.contentblocking.report.vpn.enabled", false); // ------------------------------------- // Disable lockwise app callout to the ETP card // https://bugzilla.mozilla.org/show_bug.cgi?id=1612091 // https://bugzilla.mozilla.org/show_bug.cgi?id=1612088 user_pref("browser.contentblocking.report.show_mobile_app", false); user_pref("browser.contentblocking.report.lockwise.mobile-android.url", ""); user_pref("browser.contentblocking.report.lockwise.mobile-ios.url", ""); user_pref("browser.contentblocking.report.mobile-android.url", ""); user_pref("browser.contentblocking.report.mobile-ios.url", ""); // ------------------------------------- // Disable send content blocking log to about:protections // https://bugzilla.mozilla.org/show_bug.cgi?id=1549832 user_pref("browser.contentblocking.database.enabled", false); user_pref("browser.contentblocking.cryptomining.preferences.ui.enabled", false); user_pref("browser.contentblocking.fingerprinting.preferences.ui.enabled", false); // ------------------------------------- // Disable celebrating milestone toast when certain numbers of trackers are blocked user_pref("browser.contentblocking.cfr-milestone.enabled", false); // Pref : Disable check default browser on first run user_pref("browser.shell.didSkipDefaultBrowserCheckOnFirstRun", true); // ------------------------------------- // Disable WebVTT logging and test events // https://developer.mozilla.org/en-US/docs/Web/API/WebVTT_API // https://git.sny.no/gecko/commit/?id=5701a142f2a5e89b1b716e0edec0f18d5e513678 user_pref("media.webvtt.debug.logging", false); user_pref("media.webvtt.testing.events", false); // ------------------------------------- // Disable Corroborate.jsm telemetry // https://bugzilla.mozilla.org/show_bug.cgi?id=1608308 user_pref("corroborator.enabled", false); // ------------------------------------- // Block unwanted connections user_pref("app.feedback.baseURL", ""); user_pref("app.feedbackURL", ""); user_pref("app.support.baseURL", ""); user_pref("app.update.channel", ""); user_pref("app.channelURL", ""); user_pref("app.creditsURL", ""); user_pref("app.faqURL", ""); user_pref("app.privacyURL", ""); user_pref("app.releaseNotesURL", ""); user_pref("app.update.autodownload", "never"); user_pref("app.update.url.android", ""); user_pref("app.update.service.enabled", false); // ------------------------------------- // Manage other urls and handlers user_pref("media.decoder-doctor.new-issue-endpoint", ""); user_pref("identity.sync.tokenserver.uri", ""); user_pref("browser.translation.engine", ""); user_pref("gecko.handlerService.schemes.mailto.0.uriTemplate", ""); user_pref("gecko.handlerService.schemes.mailto.0.name", ""); user_pref("gecko.handlerService.schemes.mailto.1.uriTemplate", ""); user_pref("gecko.handlerService.schemes.mailto.1.name", ""); user_pref("gecko.handlerService.schemes.irc.0.uriTemplate", ""); user_pref("gecko.handlerService.schemes.irc.0.name", ""); user_pref("gecko.handlerService.schemes.ircs.0.uriTemplate", ""); user_pref("gecko.handlerService.schemes.ircs.0.name", ""); user_pref("browser.uitour.themeOrigin", ""); user_pref("toolkit.datacollection.infoURL", ""); user_pref("identity.mobilepromo.android", ""); user_pref("identity.mobilepromo.ios", ""); // ------------------------------------- // Disable report browser errors to Mozilla // https://bugzilla.mozilla.org/show_bug.cgi?id=1426482 user_pref("browser.chrome.errorReporter.infoURL", ""); // ------------------------------------- // Disable tracking protection // [NOTE] uBlock is far superior and you can customize the lists as you wish // https://m.wiki.mozilla.org/Security/Tracking_protection#Lists user_pref("privacy.trackingprotection.origin_telemetry.enabled", false); user_pref("privacy.trackingprotection.annotate_channels", false); user_pref("privacy.trackingprotection.lower_network_priority", false); user_pref("privacy.trackingprotection.enabled", false); user_pref("privacy.trackingprotection.pbmode.enabled", false); user_pref("privacy.trackingprotection.cryptomining.enabled", false); user_pref("privacy.trackingprotection.fingerprinting.enabled", false); user_pref("privacy.trackingprotection.socialtracking.enabled", false); user_pref("privacy.trackingprotection.testing.report_blocked_node", false); user_pref("privacy.socialtracking.block_cookies.enabled", false); // ------------------------------------- // Disable SSDP (Simple Service Discovery Protocol) // https://bugzilla.mozilla.org/show_bug.cgi?id=1111967 user_pref("browser.casting.enabled", false); // ------------------------------------- // Disable tickle time under wifi network // It transmit UDP busy-work to the LAN when anticipating low latency network reads and on wifi to mitigate /// 802.11 Power Save Polling delays // If you're on wifi and an IPv4 DHCP network we will send 0 length UDP packets at port 4886 of your gateway // at the default rate of 60hz for 400ms from the start of the transaction in an attempt to improve RTT during the critical early phases // https://bugzilla.mozilla.org/show_bug.cgi?id=888268 user_pref("network.tickle-wifi.enabled", false); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // SAFE BROWSING (SB) // >>>>>>>>>>>>>>>>>>>>> // Disable SB (Safe Browsing) // [WARNING] Do this at your own risk! These are the master switches. // [SETTING] Privacy & Security>Security>... "Block dangerous and deceptive content" user_pref("browser.safebrowsing.malware.enabled", false); user_pref("browser.safebrowsing.phishing.enabled", false); user_pref("browser.safebrowsing.passwords.enabled", false); // ------------------------------------- // Disable SB checks for downloads (both local lookups + remote) // This is the master switch for the safebrowsing.downloads // [SETTING] Privacy & Security>Security>... "Block dangerous downloads" user_pref("browser.safebrowsing.downloads.enabled", false); // ------------------------------------- // Disable SB checks for downloads (remote) // [SETUP-SECURITY] If you do not understand this, or you want this protection, then override it user_pref("browser.safebrowsing.downloads.remote.enabled", false); user_pref("browser.safebrowsing.downloads.remote.url", ""); // ------------------------------------- // Disable SB checks for unwanted software // [SETTING] Privacy & Security>Security>... "Warn you about unwanted and uncommon software" user_pref("browser.safebrowsing.downloads.remote.block_potentially_unwanted", false); user_pref("browser.safebrowsing.downloads.remote.block_uncommon", false); // ------------------------------------- // Disable 'ignore this warning' on SB warnings [FF45+] // If clicked, it bypasses the block for that session. This is a means for admins to enforce SB // https://bugzilla.mozilla.org/1226490 user_pref("browser.safebrowsing.allowOverride", false); // ------------------------------------- // More Google connections user_pref("browser.safebrowsing.downloads.remote.block_dangerous", false); user_pref("browser.safebrowsing.downloads.remote.block_dangerous_host", false); user_pref("browser.safebrowsing.provider.google.updateURL", ""); user_pref("browser.safebrowsing.provider.google.gethashURL", ""); user_pref("browser.safebrowsing.provider.google4.updateURL", ""); user_pref("browser.safebrowsing.provider.google4.gethashURL", ""); user_pref("browser.safebrowsing.provider.google.reportURL", ""); user_pref("browser.safebrowsing.provider.google4.reportURL", ""); user_pref("browser.safebrowsing.provider.google.reportMalwareMistakeURL", ""); user_pref("browser.safebrowsing.provider.google.reportPhishMistakeURL", ""); user_pref("browser.safebrowsing.provider.google4.reportMalwareMistakeURL", ""); user_pref("browser.safebrowsing.provider.google4.reportPhishMistakeURL", ""); user_pref("browser.safebrowsing.provider.google4.dataSharing.enabled", false); user_pref("browser.safebrowsing.provider.google4.dataSharingURL", ""); user_pref("browser.safebrowsing.provider.google.advisory", ""); user_pref("browser.safebrowsing.provider.google.advisoryURL", ""); user_pref("browser.safebrowsing.provider.google.advisoryName", ""); user_pref("browser.safebrowsing.provider.google.gethashURL", ""); user_pref("browser.safebrowsing.provider.google4.advisoryURL", ""); user_pref("browser.safebrowsing.blockedURIs.enabled", false); user_pref("browser.safebrowsing.provider.mozilla.gethashURL", ""); user_pref("browser.safebrowsing.provider.mozilla.updateURL", ""); user_pref("browser.safebrowsing.reportPhishURL", ""); user_pref("browser.safebrowsing.features.cryptomining.update", false); user_pref("browser.safebrowsing.features.fingerprinting.update", false); user_pref("browser.safebrowsing.features.malware.update", false); user_pref("browser.safebrowsing.features.pishing.update", false); user_pref("browser.safebrowsing.features.trackingAnnotation.update", false); user_pref("browser.safebrowsing.features.trackingProtection.update", false); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // SYSTEM ADD-ONS / EXPERIMENTS // >>>>>>>>>>>>>>>>>>>>> // Disable Normandy/Shield [FF60+] // Shield is an telemetry system (including Heartbeat) that can also push and test "recipes" // https://wiki.mozilla.org/Firefox/Shield // https://github.com/mozilla/normandy user_pref("app.normandy.enabled", false); user_pref("app.normandy.api_url", ""); user_pref("app.normandy.shieldLearnMoreUrl", ""); user_pref("app.normandy.user_id", ""); // ------------------------------------- // Disable System Add-on updates user_pref("extensions.systemAddon.update.enabled", false); // [FF62+] user_pref("extensions.systemAddon.update.url", ""); // [FF44+] // ------------------------------------- // Disable PingCentre telemetry (used in several System Add-ons) [FF57+] // Currently blocked by 'datareporting.healthreport.uploadEnabled' user_pref("browser.ping-centre.telemetry", false); // ------------------------------------- // Disable Screenshots // alternatively in FF60+, disable uploading to the Screenshots server user_pref("extensions.screenshots.disabled", true); // [FF55+] user_pref("extensions.screenshots.upload-disabled", true); // [FF60+] // ------------------------------------- // Disable Form Autofill // [NOTE] Stored data is NOT secure (uses a JSON file) // [NOTE] Heuristics controls Form Autofill on forms without @autocomplete attributes // [SETTING] Privacy & Security>Forms and Autofill>Autofill addresses // https://wiki.mozilla.org/Firefox/Features/Form_Autofill user_pref("extensions.formautofill.addresses.enabled", false); // [FF55+] user_pref("extensions.formautofill.available", "off"); // [FF56+] user_pref("extensions.formautofill.creditCards.enabled", false); // [FF56+] user_pref("extensions.formautofill.creditCards.available", false); // [FF57+] user_pref("extensions.formautofill.heuristics.enabled", false); // [FF55+] user_pref("extensions.formautofill.section.enabledScopes", false); // ------------------------------------- // Enforce disabling of 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); // [DEFAULT: false] // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // BLOCK IMPLICIT OUTBOUND [not explicitly asked for - e.g. clicked on] // >>>>>>>>>>>>>>>>>>>>> // Disable link prefetching // https://developer.mozilla.org/docs/Web/HTTP/Link_prefetching_FAQ user_pref("network.prefetch-next", false); // ------------------------------------- // Disable DNS prefetching // https://developer.mozilla.org/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control user_pref("network.dns.disablePrefetch", true); // user_pref("network.dns.disablePrefetchFromHTTPS", true); // [DEFAULT: true] // ------------------------------------- // Disable predictor / prefetching user_pref("network.predictor.enabled", false); // user_pref("network.predictor.enable-prefetch", false); // [FF48+] // ------------------------------------- // Disable link-mouseover opening connection to linked server // https://news.slashdot.org/story/15/08/14/2321202/how-to-quash-firefoxs-silent-requests user_pref("network.http.speculative-parallel-limit", 0); // ------------------------------------- // Enforce no "Hyperlink Auditing" (click tracking) // https://www.bleepingcomputer.com/news/software/major-browsers-to-prevent-disabling-of-click-tracking-privacy-risk/ // user_pref("browser.send_pings", false); // [DEFAULT: false] // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // HTTP* / TCP/IP / DNS / PROXY / SOCKS etc // >>>>>>>>>>>>>>>>>>>>> // Disable IPv6 // IPv6 can be abused, especially with MAC addresses, and can leak with VPNs. That's even // assuming your ISP and/or router and/or website can handle it. Sites will fall back to IPv4 // [STATS] Firefox telemetry (July 2021) shows ~10% of all connections are IPv6 // [NOTE] This is just an application level fallback. Disabling IPv6 is best done at an // OS/network level, and/or configured properly in VPN setups. If you are not masking your IP, // then this won't make much difference. If you are masking your IP, then it can only help. // [NOTE] PHP defaults to IPv6 with "localhost". Use "php -S 127.0.0.1:PORT" // [TEST] https://ipleak.org/ // https://www.internetsociety.org/tag/ipv6-security/ user_pref("network.dns.disableIPv6", true); // ------------------------------------- // Disable HTTP2 // HTTP2 raises concerns with "multiplexing" and "server push", does nothing to // enhance privacy, and opens up a number of server-side fingerprinting opportunities. // [WARNING] Don't disable HTTP2. Don't be that one person using HTTP1.1 on HTTP2 sites // [STATS] ~46% of sites (July 2021) // https://http2.github.io/faq/ // https://blog.scottlogic.com/2014/11/07/http-2-a-quick-look.html // https://http2.github.io/http2-spec/#rfc.section.10.8 // https://queue.acm.org/detail.cfm?id=2716278 // https://w3techs.com/technologies/details/ce-http2/all/all // user_pref("network.http.spdy.enabled", false); // user_pref("network.http.spdy.enabled.deps", false); // user_pref("network.http.spdy.enabled.http2", false); // user_pref("network.http.spdy.websockets", false); // [FF65+] // ------------------------------------- // Disable HTTP Alternative Services [FF37+] // [SETUP-PERF] Relax this if you have FPI enabled *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. // https://tools.ietf.org/html/rfc7838#section-9 // https://www.mnot.net/blog/2016/03/09/alt-svc user_pref("network.http.altsvc.enabled", false); user_pref("network.http.altsvc.oe", false); // ------------------------------------- // Set the proxy server to do any DNS lookups when using SOCKS // e.g. in Tor, this stops your local DNS server from knowing your Tor destination // as a remote Tor node will handle the DNS request // https://trac.torproject.org/projects/tor/wiki/doc/TorifyHOWTO/WebBrowsers user_pref("network.proxy.socks_remote_dns", true); // ------------------------------------- // Disable SSL False Start for HTTPS/WebSockets/SPDY connections // https://bugzilla.mozilla.org/show_bug.cgi?id=658222 // Avoid the client to complete its handshake before starting the actual session user_pref("security.ssl.enable_false_start", false); // ------------------------------------- // Disable using UNC (Uniform Naming Convention) paths [FF61+] // [SETUP-CHROME] Can break extensions for profiles on network shares // https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/26424 user_pref("network.file.disable_unc_paths", true); // [HIDDEN PREF] // ------------------------------------- // 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) // https://bugzilla.mozilla.org/1433507 // https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/23044 // https://en.wikipedia.org/wiki/GVfs // https://en.wikipedia.org/wiki/GIO_(software) user_pref("network.gio.supported-protocols", ""); // [HIDDEN PREF] // ------------------------------------- // Disable DNS-over-HTTPS (DoH) // See for details: https://support.mozilla.org/en-US/kb/firefox-dns-over-https user_pref("network.trr.mode", 5); user_pref("network.trr.uri", ""); user_pref("network.trr.confirmationNS", ""); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // LOCATION BAR / SEARCH BAR / SUGGESTIONS / HISTORY / FORMS // >>>>>>>>>>>>>>>>>>>>> // Disable location bar using search // Don't leak URL typos to a search engine, give an error message instead. // Examples: "secretplace,com", "secretplace/com", "secretplace com", "secret place.com" // [NOTE] This does **not** affect explicit user action such as using search buttons in the // dropdown, or using keyword search shortcuts you configure in options (e.g. 'd' for DuckDuckGo) // [SETUP-CHROME] If you don't, or rarely, type URLs, or you use a default search // engine that respects privacy, then you probably don't need this ***/ // user_pref("keyword.enabled", false); // ------------------------------------- // 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); // ------------------------------------- // Display all parts of the url in the location bar user_pref("browser.urlbar.trimURLs", false); // ------------------------------------- // Disable coloring of visited links - CSS history leak // Bulk rapid history sniffing was mitigated in 2010. Slower and more expensive // redraw timing attacks were largely mitigated in FF77+. Using RFP further hampers timing // attacks. Don't forget clearing history on close. However, social engineering // and advanced targeted timing attacks could still produce usable results // https://developer.mozilla.org/docs/Web/CSS/Privacy_and_the_:visited_selector // https://dbaron.org/mozilla/visited-privacy // https://bugzilla.mozilla.org/1632765 // https://earthlng.github.io/testpages/visited_links.html (see github wiki APPENDIX A on how to use) // https://lcamtuf.blogspot.com/2016/08/css-mix-blend-mode-is-bad-for-keeping.html user_pref("layout.css.visited_links_enabled", false); // ------------------------------------- // Disable live search suggestions // [NOTE] Both must be true for the location bar to work // [SETUP-CHROME] Change these if you trust and use a privacy respecting search engine // [SETTING] Search>Provide search suggestions | Show search suggestions in address bar results user_pref("browser.search.suggest.enabled", false); user_pref("browser.urlbar.suggest.searches", false); // ------------------------------------- // Disable location bar making speculative connections [FF56+] // https://bugzilla.mozilla.org/1348275 user_pref("browser.urlbar.speculativeConnect.enabled", false); // ------------------------------------- // Disable location bar leaking single words to a DNS provider **after searching** [FF78+] // 0=never resolve single words, 1=heuristic (default), 2=always resolve // [NOTE] For FF78 value 1 and 2 are the same and always resolve but that will change in future versions // https://bugzilla.mozilla.org/1642623 ***/ user_pref("browser.urlbar.dnsResolveSingleWordsAfterSearch", 0); // ------------------------------------- // Disable location bar suggestion types // [SETTING] Privacy & Security>Address Bar>When using the address bar, suggest user_pref("browser.urlbar.suggest.history", false); user_pref("browser.urlbar.suggest.bookmark", false); user_pref("browser.urlbar.suggest.openpage", false); user_pref("browser.urlbar.suggest.topsites", false); // [FF78+] user_pref("browser.urlbar.suggest.engines", false); // [FF85+] // ------------------------------------- // Disable location bar dropdown // This value controls the total number of entries to appear in the location bar dropdown // user_pref("browser.urlbar.maxRichResults", 0); // ------------------------------------- // Disable location bar autofill // https://support.mozilla.org/kb/address-bar-autocomplete-firefox#w_url-autocomplete user_pref("browser.urlbar.autoFill", false); // ------------------------------------- // Disable search and form history // [SETUP-WEB] Be aware that autocomplete form data can be read by third parties // [NOTE] We also clear formdata on exit // [SETTING] Privacy & Security>History>Custom Settings>Remember search and form history // https://blog.mindedsecurity.com/2011/10/autocompleteagain.html // https://bugzilla.mozilla.org/381681 user_pref("browser.formfill.enable", false); // ------------------------------------- // Disable browsing and download history // [NOTE] We also clear history and downloads on exiting Firefox // [SETTING] Privacy & Security>History>Custom Settings>Remember browsing and download history user_pref("places.history.enabled", false); // ------------------------------------- // 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); // ------------------------------------- // Disable Windows taskbar preview [WINDOWS] user_pref("browser.taskbar.previews.enable", false); // [DEFAULT: false] // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // PASSWORDS // >>>>>>>>>>>>>>>>>>>>> // Disable saving passwords and password alerts. // [NOTE] This does not clear any passwords already saved // [SETTING] Privacy & Security>Logins and Passwords>Ask to save logins and passwords for websites user_pref("signon.rememberSignons", false); user_pref("signon.generation.enabled", false); user_pref("signon.management.page.breach-alerts.enabled", false); user_pref("signon.management.page.breachAlertUrl", ""); // ------------------------------------- // Use a primary password // There are no preferences for this. It is all handled internally. // [SETTING] Privacy & Security>Logins and Passwords>Use a Primary Password // https://support.mozilla.org/kb/use-primary-password-protect-stored-logins-and-pas // Set how often Firefox should ask for the primary password // 0=the first time (default), 1=every time it's needed, 2=every n minutes user_pref("security.ask_for_password", 2); // ------------------------------------- // Set how often in minutes Firefox should ask for the primary password // in minutes, default is 30 user_pref("security.password_lifetime", 5); // ------------------------------------- // Disable auto-filling username & password form fields // can leak in cross-site forms *and* be spoofed // [NOTE] Username & password is still available when you enter the field // [SETTING] Privacy & Security>Logins and Passwords>Autofill logins and passwords // https://freedom-to-tinker.com/2017/12/27/no-boundaries-for-user-identities-web-trackers-exploit-browser-login-managers/ user_pref("signon.autofillForms", false); // ------------------------------------- // Disable formless login capture for Password Manager [FF51+] user_pref("signon.formlessCapture.enabled", false); // ------------------------------------- // Limit (or disable) HTTP authentication credentials dialogs triggered by sub-resources [FF41+] // hardens against potential credentials phishing // 0=don't allow sub-resources to open HTTP authentication credentials dialogs // 1=don't allow cross-origin sub-resources to open HTTP authentication credentials dialogs // 2=allow sub-resources to open HTTP authentication credentials dialogs (default) user_pref("network.auth.subresource-http-auth-allow", 1); // ------------------------------------- // Disable automatic authentication on Microsoft sites [FF91+] [WINDOWS 10+] // [SETTING] Privacy & Security>Logins and Passwords>Allow Windows single sign-on for... // https://support.mozilla.org/kb/windows-sso ***/ user_pref("network.http.windows-sso.enabled", false); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // CACHE // >>>>>>>>>>>>>>>>>>>>> // Disable disk cache // [SETUP-PERF] If you think disk cache may help (heavy tab user, high-res video), // or you use a hardened Temporary Containers, then feel free to override this // [NOTE] We also clear cache on exiting Firefox user_pref("browser.cache.disk.enable", false); // ------------------------------------- // Disable memory cache // capacity: -1=determine dynamically (default), 0=none, n=memory capacity in kibibytes // user_pref("browser.cache.memory.enable", false); // user_pref("browser.cache.memory.capacity", 0); // ------------------------------------- // Disable permissions manager from writing to disk [RESTART] // [NOTE] This means any permission changes are session only // https://bugzilla.mozilla.org/967812 // user_pref("permissions.memory_only", true); // [HIDDEN PREF] // ------------------------------------- // Disable media cache from writing to disk in Private Browsing // [NOTE] MSE (Media Source Extensions) are already stored in-memory in PB // [SETUP-WEB] ESR78: playback might break on subsequent loading user_pref("browser.privatebrowsing.forceMediaMemoryCache", true); // [FF75+] user_pref("media.memory_cache_max_size", 65536); // ------------------------------------- // Network Partitioning // Network Partitioning will allow Firefox to save resources like the cache, favicons, CSS files, images, and more // on a per-website basis rather than together in the same pool. // https://www.zdnet.com/article/firefox-to-ship-network-partitioning-as-a-new-anti-tracking-defense/ // https://github.com/privacycg/storage-partitioning#introduction // https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Privacy/State_Partitioning // https://blog.mozilla.org/security/2021/01/26/supercookie-protections/ user_pref("privacy.partition.network_state", true); // [DEFAULT: true] // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // SESSIONS & SESSION RESTORE // >>>>>>>>>>>>>>>>>>>>> // Exclude "Undo Closed Tabs" in Session Restore // user_pref("browser.sessionstore.max_tabs_undo", 0); // ------------------------------------- // Disable storing extra session data [SETUP-CHROME] // define on which sites to save extra session data such as form content, cookies and POST data // 0=everywhere, 1=unencrypted sites, 2=nowhere user_pref("browser.sessionstore.privacy_level", 2); // ------------------------------------- // Disable resuming session from crash // user_pref("browser.sessionstore.resume_from_crash", false); // ------------------------------------- // Set the minimum interval between session save operations // Increasing this can help on older machines and some websites, as well as reducing writes // 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 // https://bugzilla.mozilla.org/1304389 user_pref("browser.sessionstore.interval", 30000); // ------------------------------------- // Disable automatic Firefox start and session restore after reboot [FF62+] [WINDOWS] // https://bugzilla.mozilla.org/603903 user_pref("toolkit.winRegisterApplicationRestart", false); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // FAVICONS // >>>>>>>>>>>>>>>>>>>>> // 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); // ------------------------------------- // Disable favicons in history and bookmarks // Stored as data blobs in favicons.sqlite, these don't reveal anything that your // actual history (and bookmarks) already do. Your history is more detailed, so // control that instead; e.g. disable history, clear history on close, use PB mode // [NOTE] favicons.sqlite is sanitized on Firefox close, not in-session user_pref("browser.chrome.site_icons", false); // ------------------------------------- // Disable favicons in web notifications user_pref("alerts.showFavicons", false); // [DEFAULT: false] // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // SSL (Secure Sockets Layer) / TLS (Transport Layer Security) // >>>>>>>>>>>>>>>>>>>>> // Require safe negotiation // Blocks connections (SSL_ERROR_UNSAFE_NEGOTIATION) to servers that don't support RFC 5746 // as they're potentially vulnerable to a MiTM attack [3]. A server without RFC 5746 can be // safe from the attack if it disables renegotiations but the problem is that the browser can't // know that. Setting this pref to true is the only way for the browser to ensure there will be // no unsafe renegotiations on the channel between the browser and the server. // https://wiki.mozilla.org/Security:Renegotiation // https://tools.ietf.org/html/rfc5746 // https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3555 user_pref("security.ssl.require_safe_negotiation", true); // ------------------------------------- // Control TLS versions with min and max // 1=TLS 1.0, 2=TLS 1.1, 3=TLS 1.2, 4=TLS 1.3 // [WARNING] Leave these at default, otherwise you alter your TLS fingerprint. // https://www.ssllabs.com/ssl-pulse/ // user_pref("security.tls.version.min", 3); // [DEFAULT: 3] // user_pref("security.tls.version.max", 4); // ------------------------------------- // Enforce TLS 1.0 and 1.1 downgrades as session only ***/ user_pref("security.tls.version.enable-deprecated", false); // [DEFAULT: false] // ------------------------------------- // Disable SSL session tracking [FF36+] // SSL Session IDs are unique and last up to 24hrs in Firefox (or longer with prolongation attacks) // These are not used in PB mode. In normal windows they are isolated when using FPI // and/or containers. In FF85+ they are isolated by default (privacy.partition.network_state) // [WARNING] There are perf and passive fingerprinting costs, for little to no gain. Preventing // tracking via this method does not address IPs, nor handle any sanitizing of current identifiers // https://tools.ietf.org/html/rfc5077 // https://bugzilla.mozilla.org/967977 // https://arxiv.org/abs/1810.07304 user_pref("security.ssl.disable_session_identifiers", true); // [HIDDEN PREF] // ------------------------------------- // Disable TLS1.3 0-RTT (round-trip time) [FF51+] // https://github.com/tlswg/tls13-spec/issues/1001 // 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) // >>>>>>>>>>>>>>>>>>>>> // Enable OCSP Stapling // https://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox/ user_pref("security.ssl.enable_ocsp_stapling", false); // ------------------------------------- // 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 // https://en.wikipedia.org/wiki/Ocsp user_pref("security.OCSP.enabled", 0); // ------------------------------------- // Set OCSP fetch failures (non-stapled) 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) // https://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox/ // https://www.imperialviolet.org/2014/04/19/revchecking.html user_pref("security.OCSP.require", false); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // CERTS / HPKP (HTTP Public Key Pinning) // >>>>>>>>>>>>>>>>>>>>> // 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); // ------------------------------------- // 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 // https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/21686 user_pref("security.family_safety.mode", 0); // ------------------------------------- // Disable intermediate certificate caching (fingerprinting attack vector) [FF41+] [RESTART] // [NOTE] This affects login/cert/key dbs. The effect is all credentials are session-only. // Saved logins and passwords are not available. Reset the pref and restart to return them. // https://shiftordie.de/blog/2017/02/21/fingerprinting-firefox-users-with-cached-intermediate-ca-certificates-fiprinca/ // user_pref("security.nocertdb", true); // [HIDDEN PREF] // ------------------------------------- // Enable strict pinning // PKP (Public Key Pinning) 0=disabled 1=allow user MiTM (such as your antivirus), 2=strict // [SETUP-WEB] If you rely on an AV (antivirus) to protect your web browsing // by inspecting ALL your web traffic, then leave at current default=1 // https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/16206 user_pref("security.cert_pinning.enforcement_level", 2); // ------------------------------------- // Disable CRLite [FF73+] // In FF84+ it covers valid certs and in mode 2 doesn't fall back to OCSP // https://bugzilla.mozilla.org/buglist.cgi?bug_id=1429800,1670985 // https://blog.mozilla.org/security/tag/crlite/ ***/ user_pref("security.remote_settings.intermediates.enabled", false); user_pref("security.remote_settings.intermediates.bucket", ""); user_pref("security.remote_settings.intermediates.collection", ""); user_pref("security.remote_settings.intermediates.signer", ""); user_pref("security.remote_settings.crlite_filters.enabled", false); user_pref("security.remote_settings.crlite_filters.bucket", ""); user_pref("security.remote_settings.crlite_filters.collection", ""); user_pref("security.remote_settings.crlite_filters.signer", ""); user_pref("security.pki.crlite_mode", 0); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // MIXED CONTENT // >>>>>>>>>>>>>>>>>>>>> // Enforce no insecure active content on https pages // https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/21323 user_pref("security.mixed_content.block_active_content", true); // [DEFAULT: true] // ------------------------------------- // Disable insecure passive content (such as images) on https pages [SETUP-WEB] user_pref("security.mixed_content.block_display_content", true); // ------------------------------------- // Enable HTTPS-Only mode [FF76+] // When "https_only_mode" (all windows) is true, "https_only_mode_pbm" (private windows only) is ignored // [SETTING] to add site exceptions: Ctrl+I>HTTPS-Only mode>On/Off/Off temporarily // [SETTING] Privacy & Security>HTTPS-Only Mode // [TEST] http://example.com [upgrade] // [TEST] http://neverssl.org/ [no upgrade] // https://bugzilla.mozilla.org/1613063 [META] user_pref("dom.security.https_only_mode", true); // [FF76+] user_pref("dom.security.https_only_mode_pbm", true); // [FF80+] // ------------------------------------- // Enable HTTPS-Only mode for local resources [FF77+] // user_pref("dom.security.https_only_mode.upgrade_local", true); // ------------------------------------- // Disable HTTP background requests [FF82+] // When attempting to upgrade, if the server doesn't respond within 3 seconds, firefox // sends HTTP requests in order to check if the server supports HTTPS or not. // This is done to avoid waiting for a timeout which takes 90 seconds // https://bugzilla.mozilla.org/buglist.cgi?bug_id=1642387,1660945 user_pref("dom.security.https_only_mode_send_http_background_request", false); // ------------------------------------- // Treat .onion as a secure context [FF60+] [TOR] // [NOTE] Firefox cannot access .onion sites by default: it is strongly recommended you just use Tor Browser // https://bugzilla.mozilla.org/1382359 // user_pref("dom.securecontext.whitelist_onions", true); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // CIPHERS [WARNING: do not meddle with your cipher suite] // >>>>>>>>>>>>>>>>>>>>> // Disable 3DES (effective key size < 128 and no PFS) // https://en.wikipedia.org/wiki/3des#Security // https://en.wikipedia.org/wiki/Meet-in-the-middle_attack // https://www-archive.mozilla.org/projects/security/pki/nss/ssl/fips-ssl-ciphersuites.html // user_pref("security.ssl3.rsa_des_ede3_sha", false); // ------------------------------------- // Disable the remaining non-modern cipher suites as of FF78 (in order of preferred by FF) // user_pref("security.ssl3.ecdhe_ecdsa_aes_256_sha", false); // user_pref("security.ssl3.ecdhe_ecdsa_aes_128_sha", false); // user_pref("security.ssl3.ecdhe_rsa_aes_128_sha", false); // user_pref("security.ssl3.ecdhe_rsa_aes_256_sha", false); // user_pref("security.ssl3.rsa_aes_128_gcm_sha256", false); // no PFS // user_pref("security.ssl3.rsa_aes_256_gcm_sha384", false); // no PFS // user_pref("security.ssl3.rsa_aes_128_sha", false); // no PFS // user_pref("security.ssl3.rsa_aes_256_sha", false); // no PFS // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // UI (User Interface) // >>>>>>>>>>>>>>>>>>>>> // Display warning on the padlock for "broken security" // Bug: warning padlock not indicated for subresources on a secure page! // [STATS] SSL Labs (July 2021) reports over 99% of sites have secure renegotiation // https://wiki.mozilla.org/Security:Renegotiation // https://bugzilla.mozilla.org/1353705 // https://www.ssllabs.com/ssl-pulse/ user_pref("security.ssl.treat_unsafe_negotiation_as_broken", true); // ------------------------------------- // 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); // ------------------------------------- // 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); // ------------------------------------- // Display "insecure" icon and "Not Secure" text on HTTP sites // user_pref("security.insecure_connection_icon.enabled", true); // [FF59+] [DEFAULT: true] user_pref("security.insecure_connection_text.enabled", true); // [FF60+] user_pref("security.insecure_connection_text.pbmode.enabled", true); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // FONTS // >>>>>>>>>>>>>>>>>>>>> // Disable websites choosing fonts (0=block, 1=allow) // This can limit most (but not all) JS font enumeration which is a high entropy fingerprinting vector // [WARNING] DO NOT USE: in FF80+ RFP covers this, and non-RFP users should use font vis // [SETTING] General>Language and Appearance>Fonts & Colors>Advanced>Allow pages to choose... user_pref("browser.display.use_document_fonts", 0); // ------------------------------------- // Disable icon fonts (glyphs) and local fallback rendering // https://bugzilla.mozilla.org/789788 // https://gitlab.torproject.org/legacy/trac/-/issues/8455 // user_pref("gfx.downloadable_fonts.enabled", false); // [FF41+] // user_pref("gfx.downloadable_fonts.fallback_delay", -1); // ------------------------------------- // Disable rendering of SVG OpenType fonts // https://wiki.mozilla.org/SVGOpenTypeFonts - iSECPartnersReport recommends to disable this user_pref("gfx.font_rendering.opentype_svg.enabled", false); // ------------------------------------- // Disable graphite // Graphite has had many critical security issues in the past // https://www.mozilla.org/security/advisories/mfsa2017-15/#CVE-2017-7778 // https://en.wikipedia.org/wiki/Graphite_(SIL) user_pref("gfx.font_rendering.graphite.enabled", false); // ------------------------------------- // Limit system font exposure to a whitelist [FF52+] [RESTART] // If the whitelist is empty, then whitelisting is considered disabled and all fonts are allowed // [WARNING] DO NOT USE: in FF80+ RFP covers this, and non-RFP users should use font vis // https://bugzilla.mozilla.org/1121643 // user_pref("font.system.whitelist", ""); // [HIDDEN PREF] // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // HEADERS / REFERERS // >>>>>>>>>>>>>>>>>>>>> // 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); // ------------------------------------- // 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); // ------------------------------------- // Control when to send a referer // 0=always (default), 1=only if base domains match, 2=only if hosts match // [SETUP-WEB] Known to cause issues with older modems/routers and some sites e.g vimeo, icloud, instagram user_pref("network.http.referer.XOriginPolicy", 2); // ------------------------------------- // 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", 2); // ------------------------------------- // 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] // ------------------------------------- // 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 // https://www.w3.org/TR/referrer-policy/ // https://developer.mozilla.org/docs/Web/HTTP/Headers/Referrer-Policy // https://blog.mozilla.org/security/2018/01/31/preventing-data-leaks-by-stripping-path-information-in-http-referrers/ // https://blog.mozilla.org/security/2021/03/22/firefox-87-trims-http-referrers-by-default-to-protect-user-privacy/ // user_pref("network.http.referer.defaultPolicy", 2); // [DEFAULT: 2 FF87+] // user_pref("network.http.referer.defaultPolicy.pbmode", 2); // [DEFAULT: 2] // ------------------------------------- // Hide (not spoof) referrer when leaving a .onion domain [FF54+] [TOR] // [NOTE] Firefox cannot access .onion sites by default: it is strongly recommended you just use Tor Browser // https://bugzilla.mozilla.org/1305144 // user_pref("network.http.referer.hideOnionSource", true); // ------------------------------------- // Enable the DNT (Do Not Track) HTTP header // [NOTE] DNT is enforced with Enhanced Tracking Protection regardless of this pref // [SETTING] Privacy & Security>Enhanced Tracking Protection>Send websites a "Do Not Track" signal... user_pref("privacy.donottrackheader.enabled", false); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // CONTAINERS // >>>>>>>>>>>>>>>>>>>>> // Enable Container Tabs setting in preferences [FF50+] // https://bugzilla.mozilla.org/1279029 user_pref("privacy.userContext.ui.enabled", true); // ------------------------------------- // Enable Container Tabs [FF50+] // [SETTING] General>Tabs>Enable Container Tabs user_pref("privacy.userContext.enabled", true); // ------------------------------------- // Set behaviour on "+ Tab" button to display container menu on left click [FF74+] // [NOTE] The menu is always shown on long press and right click // [SETTING] General>Tabs>Enable Container Tabs>Settings>Select a container for each new tab // user_pref("privacy.userContext.newTabContainerOnLeftClick.enabled", true); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // PLUGINS // >>>>>>>>>>>>>>>>>>>>> // Disable GMP (Gecko Media Plugins) // https://wiki.mozilla.org/GeckoMediaPlugins user_pref("media.gmp-provider.enabled", false); // ------------------------------------- // Disable downloading OpenH264 codec at the first start of Firefox user_pref("media.gmp-gmpopenh264.enabled", false); // ------------------------------------- // Disable widevine CDM (Content Decryption Module) // [SETUP-WEB] e.g. Netflix, Amazon Prime, Hulu, HBO, Disney+, Showtime, Starz, DirectTV user_pref("media.gmp-widevinecdm.enabled", false); user_pref("media.gmp-manager.url", ""); user_pref("media.gmp-manager.url.override", ""); // ------------------------------------- // Disable all DRM content (EME: Encryption Media Extension) // [SETUP-WEB] e.g. Netflix, Amazon Prime, Hulu, HBO, Disney+, Showtime, Starz, DirectTV // [SETTING] General>DRM Content>Play DRM-controlled content // [TEST] https://bitmovin.com/demos/drm // 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); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // MEDIA / CAMERA / MIC // >>>>>>>>>>>>>>>>>>>>> // Disable WebRTC (Web Real-Time Communication) // [SETUP-WEB] WebRTC can leak your IP address from behind your VPN, but if this is not // in your threat model, and you want Real-Time Communication, this is the pref for you // https://www.privacytools.io/#webrtc user_pref("media.peerconnection.enabled", false); // ------------------------------------- // Limit WebRTC IP leaks if using WebRTC // In FF70+ these settings match Mode 4 (Mode 3 in older versions) // [TEST] https://browserleaks.com/webrtc // https://bugzilla.mozilla.org/buglist.cgi?bug_id=1189041,1297416,1452713 // https://wiki.mozilla.org/Media/WebRTC/Privacy // https://tools.ietf.org/html/draft-ietf-rtcweb-ip-handling-12#section-5.2 user_pref("media.peerconnection.ice.default_address_only", true); user_pref("media.peerconnection.ice.no_host", true); // [FF51+] user_pref("media.peerconnection.ice.proxy_only_if_behind_proxy", true); // [FF70+] // ------------------------------------- // Disable screensharing user_pref("media.getusermedia.screensharing.enabled", false); user_pref("media.getusermedia.browser.enabled", false); user_pref("media.getusermedia.audiocapture.enabled", false); // ------------------------------------- // Set a default permission for Camera/Microphone [FF58+] // 0=always ask (default), 1=allow, 2=block // [SETTING] to add site exceptions: Ctrl+I>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); // ------------------------------------- // Disable autoplay of HTML5 media [FF63+] // 0=Allow all, 1=Block non-muted media (default in FF67+), 2=Prompt (removed in FF66), 5=Block all (FF69+) // [NOTE] You can set exceptions under site permissions // [SETTING] Privacy & Security>Permissions>Autoplay>Settings>Default for all websites // user_pref("media.autoplay.default", 5); // ------------------------------------- // Disable autoplay of HTML5 media if you interacted with the site [FF78+] // 0=sticky (default), 1=transient, 2=user // [NOTE] If you have trouble with some video sites, then add an exception // https://support.mozilla.org/questions/1293231 user_pref("media.autoplay.blocking_policy", 2); // ------------------------------------- // Pref : Disable showing avif images // user_pref("image.avif.enabled", false); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // WINDOW MEDDLING & LEAKS / POPUPS // >>>>>>>>>>>>>>>>>>>>> // Prevent scripts from moving and resizing open windows user_pref("dom.disable_window_move_resize", true); // ------------------------------------- // Open links targeting new windows in a new tab instead // This stops malicious window sizes and some screen resolution leaks. // You can still right-click a link and open in a new window. // [TEST] https://arkenfox.github.io/TZP/tzp.html#screen // https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/9881 user_pref("browser.link.open_newwindow", 3); // 1=most recent window or tab 2=new window, 3=new tab user_pref("browser.link.open_newwindow.restriction", 0); // ------------------------------------- // Disable Fullscreen API (requires user interaction) to prevent screen-resolution leaks // [NOTE] You can still manually toggle the browser's fullscreen state (F11), // but this pref will disable embedded video/game fullscreen controls, e.g. youtube // [TEST] https://arkenfox.github.io/TZP/tzp.html#screen // user_pref("full-screen-api.enabled", false); // ------------------------------------- // Block popup windows // [SETTING] Privacy & Security>Permissions>Block pop-up windows user_pref("dom.disable_open_during_load", true); // ------------------------------------- // Limit events that can cause a popup [SETUP-WEB] // default FF86+: "change click dblclick auxclick mousedown mouseup pointerdown pointerup notificationclick reset submit touchend contextmenu" user_pref("dom.popup_allowed_events", "click dblclick mousedown pointerdown"); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // WEB WORKERS // >>>>>>>>>>>>>>>>>>>>> // Disable service workers [FF32, FF44-compat] // Service workers essentially act as proxy servers that sit between web apps, and the // browser and network, are event driven, and can control the web page/site it is associated // with, intercepting and modifying navigation and resource requests, and caching resources. // [NOTE] Service worker APIs are hidden (in Firefox) and cannot be used when in PB mode. // [NOTE] Service workers only run over HTTPS. Service workers have no DOM access. // [SETUP-WEB] Disabling service workers will break some sites. This pref is required true for // service worker notifications, push notifications and service worker // cache. If you enable this pref, then check those settings as well user_pref("dom.serviceWorkers.enabled", false); // ------------------------------------- // Disable Web Notifications // [NOTE] Web Notifications can also use service workers and are behind a prompt // https://developer.mozilla.org/docs/Web/API/Notifications_API user_pref("dom.webnotifications.enabled", false); // [FF22+] // user_pref("dom.webnotifications.serviceworker.enabled", false); // [FF44+] // ------------------------------------- // Disable Push Notifications [FF44+] // Push is an API that allows websites to send you (subscribed) messages even when the site // isn't loaded, by pushing messages to your userAgentID through Mozilla's Push Server. // [NOTE] Push requires service workers to subscribe to and display, and is behind // a prompt. Disabling service workers alone doesn't stop Firefox polling the // Mozilla Push Server. To remove all subscriptions, reset your userAgentID (in about:config // or on start), and you will get a new one within a few seconds. // https://support.mozilla.org/kb/push-notifications-firefox // 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", ""); // ------------------------------------- // Set a default permission for Notifications [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: Ctrl+I>Permissions>Receive Notifications // [SETTING] to manage site exceptions: Options>Privacy & Security>Permissions>Notifications>Settings // user_pref("permissions.default.desktop-notification", 2); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // DOM (DOCUMENT OBJECT MODEL) & JAVASCRIPT // >>>>>>>>>>>>>>>>>>>>> // 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); // ------------------------------------- // Disable website access to clipboard events/content [SETUP-HARDEN] // [NOTE] This will break some sites' functionality e.g. Outlook, Twitter, Facebook, Wordpress // This applies to onCut/onCopy/onPaste events - i.e. it requires interaction with the website // [WARNING] In FF88 or lower, with clipboardevents enabled, if both 'middlemouse.paste' and // 'general.autoScroll' are true (at least one is default false) then the clipboard can leak // https://bugzilla.mozilla.org/1528289 user_pref("dom.event.clipboardevents.enabled", false); // ------------------------------------- // Disable clipboard commands (cut/copy) from "non-privileged" content [FF41+] // this disables document.execCommand("cut"/"copy") to protect your clipboard // https://bugzilla.mozilla.org/1170911 user_pref("dom.allow_cut_copy", false); // ------------------------------------- // Disable "Confirm you want to leave" dialog on page close // Does not prevent JS leaks of the page close event. // https://developer.mozilla.org/docs/Web/Events/beforeunload // https://support.mozilla.org/questions/1043508 user_pref("dom.disable_beforeunload", true); // ------------------------------------- // Disable shaking the screen user_pref("dom.vibrator.enabled", false); // ------------------------------------- // Disable asm.js [FF22+] [SETUP-PERF] // http://asmjs.org/ // https://www.mozilla.org/security/advisories/mfsa2015-29/ // https://www.mozilla.org/security/advisories/mfsa2015-50/ // https://www.mozilla.org/security/advisories/mfsa2017-01/#CVE-2017-5375 // https://www.mozilla.org/security/advisories/mfsa2017-05/#CVE-2017-5400 // https://rh0dev.github.io/blog/2017/the-return-of-the-jit/ user_pref("javascript.options.asmjs", false); // ------------------------------------- // Disable Ion and baseline JIT to harden against JS exploits [SETUP-HARDEN] // [NOTE] In FF75+, when **both** Ion and JIT are disabled, **and** the new // hidden pref is enabled, then Ion can still be used by extensions (1599226) // [WARNING] Disabling Ion/JIT can cause some site issues and performance loss // https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0817 user_pref("javascript.options.ion", false); user_pref("javascript.options.baselinejit", false); user_pref("javascript.options.native_regexp", false); user_pref("javascript.options.jit_trustedprincipals", true); // [FF75+] [HIDDEN PREF] // ------------------------------------- // Disable WebAssembly [FF52+] [SETUP-PERF] // Vulnerabilities have increasingly been found, including those known and fixed // in native programs years ago. WASM has powerful low-level access, making // certain attacks (brute-force) and vulnerabilities more possible // [STATS] ~0.2% of websites, about half of which are for crytopmining / malvertising // https://developer.mozilla.org/docs/WebAssembly // https://spectrum.ieee.org/tech-talk/telecom/security/more-worries-over-the-security-of-web-assembly // https://www.zdnet.com/article/half-of-the-websites-using-webassembly-use-it-for-malicious-purposes user_pref("javascript.options.wasm", false); // ------------------------------------- // Enable (limited but sufficient) window.opener protection [FF65+] // Makes rel=noopener implicit for target=_blank in anchor and area elements when no rel attribute is set user_pref("dom.targetBlankNoOpener.enabled", true); // [DEFAULT: true FF79+] // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // HARDWARE FINGERPRINTING // >>>>>>>>>>>>>>>>>>>>> // 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 // https://bugzilla.mozilla.org/1313580 user_pref("dom.battery.enabled", false); // ------------------------------------- // Disable hardware acceleration to reduce graphics fingerprinting [SETUP-HARDEN] // [WARNING] Affects text rendering (fonts will look different), impacts video performance, // and parts of Quantum that utilize the GPU will also be affected as they are rolled out // [SETTING] General>Performance>Custom>Use hardware acceleration when available // https://wiki.mozilla.org/Platform/GFX/HardwareAcceleration // user_pref("gfx.direct2d.disabled", true); // user_pref("layers.acceleration.disabled", true); // ------------------------------------- // Disable Media Capabilities API [FF63+] // [WARNING] This *may* affect media performance if disabled, no one is sure // https://github.com/WICG/media-capabilities // https://wicg.github.io/media-capabilities/#security-privacy-considerations // user_pref("media.media-capabilities.enabled", false); // ------------------------------------- // Disable virtual reality devices // Optional protection depending on your connected devices // https://developer.mozilla.org/docs/Web/API/WebVR_API // user_pref("dom.vr.enabled", false); // ------------------------------------- // Set a default permission for Virtual Reality [FF73+] // 0=always ask (default), 1=allow, 2=block // [SETTING] to add site exceptions: Ctrl+I>Permissions>Access Virtual Reality Devices // [SETTING] to manage site exceptions: Options>Privacy & Security>Permissions>Virtual Reality>Settings // user_pref("permissions.default.xr", 2); // ------------------------------------- // Disable WebGL (Web Graphics Library) // [SETUP-WEB] When disabled, may break some websites. When enabled, provides high entropy, // especially with readPixels(). Some of the other entropy is lessened with RFP // https://www.contextis.com/resources/blog/webgl-new-dimension-browser-exploitation/ // https://security.stackexchange.com/questions/13799/is-webgl-a-security-concern user_pref("webgl.disabled", true); user_pref("webgl.enable-webgl2", false); // ------------------------------------- // Limit WebGL user_pref("webgl.disable-fail-if-major-performance-caveat", true); // [DEFAULT: true FF86+] // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // MISCELLANEOUS // >>>>>>>>>>>>>>>>>>>>> // Prevent accessibility services from accessing your browser [RESTART] // [SETTING] Privacy & Security>Permissions>Prevent accessibility services from accessing your browser (FF80 or lower) // https://support.mozilla.org/kb/accessibility-services user_pref("accessibility.force_disabled", 1); // ------------------------------------- // Disable sending additional analytics to web servers // https://developer.mozilla.org/docs/Web/API/Navigator/sendBeacon user_pref("beacon.enabled", false); // ------------------------------------- // Remove temp files opened with an external application // https://bugzilla.mozilla.org/302433 user_pref("browser.helperApps.deleteTempFileOnExit", true); // ------------------------------------- // Disable page thumbnail collection user_pref("browser.pagethumbnails.capturing_disabled", true); // [HIDDEN PREF] // ------------------------------------- // 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", ""); // ------------------------------------- // Disable various developer tools in browser context // [SETTING] Devtools>Advanced Settings>Enable browser chrome and add-on debugging toolboxes // https://github.com/pyllyukko/user.js/issues/179#issuecomment-246468676 user_pref("devtools.chrome.enabled", false); // ------------------------------------- // Reset remote debugging to disabled // https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/16222 user_pref("devtools.debugger.remote-enabled", false); // [DEFAULT: false] user_pref("devtools.webide.autoinstallADBHelper", false); user_pref("devtools.performance.recording.ui-base-url", "http://localhost:55555"); user_pref("devtools.devices.url", ""); user_pref("devtools.remote.adb.extensionURL", ""); // [FF64+] user_pref("devtools.remote.adb.extensionID", ""); user_pref("devtools.selfxss.count", 0); // ------------------------------------- // Disable MathML (Mathematical Markup Language) [FF51+] [SETUP-HARDEN] // [TEST] https://arkenfox.github.io/TZP/tzp.html#misc // https://bugzilla.mozilla.org/1173199 user_pref("mathml.disabled", true); // ------------------------------------- // Disable in-content SVG (Scalable Vector Graphics) [FF53+] // [WARNING] Expect breakage incl. youtube player controls. Best left for a "hardened" profile. // https://bugzilla.mozilla.org/1216893 // user_pref("svg.disabled", true); // ------------------------------------- // Disable middle mouse click opening links from clipboard // https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/10089 user_pref("middlemouse.contentLoadURL", false); // ------------------------------------- // Disable websites overriding Firefox's keyboard shortcuts [FF58+] // 0 (default) or 1=allow, 2=block // [SETTING] to add site exceptions: Ctrl+I>Permissions>Override Keyboard Shortcuts // user_pref("permissions.default.shortcuts", 2); // ------------------------------------- // Remove special permissions for certain mozilla domains [FF35+] // resource://app/defaults/permissions user_pref("permissions.manager.defaultsUrl", ""); // ------------------------------------- // Remove webchannel whitelist ***/ user_pref("webchannel.allowObject.urlWhitelist", ""); // ------------------------------------- // Use Punycode in Internationalized Domain Names to eliminate possible spoofing // Firefox has *some* protections, but it is better to be safe than sorry // [SETUP-WEB] Might be undesirable for non-latin alphabet users since legitimate IDN's are also punycoded // [TEST] https://www.xn--80ak6aa92e.com/ (www.apple.com) // https://wiki.mozilla.org/IDN_Display_Algorithm // https://en.wikipedia.org/wiki/IDN_homograph_attack // CVE-2017-5383: https://www.mozilla.org/security/advisories/mfsa2017-02/ // https://www.xudongz.com/blog/2017/idn-phishing/ user_pref("network.IDN_show_punycode", true); // ------------------------------------- // Enforce PDFJS, disable PDFJS scripting [SETUP-CHROME] // This setting controls if the option "Display in Firefox" is available in the setting below // and by effect controls whether PDFs are handled in-browser or externally ("Ask" or "Open With") // PROS: pdfjs is lightweight, open source, and as secure/vetted as any pdf reader out there (more than most) // Exploits are rare (one serious case in seven years), treated seriously and patched quickly. // It doesn't break "state separation" of browser content (by not sharing with OS, independent apps). // It maintains disk avoidance and application data isolation. It's convenient. You can still save to disk. // CONS: You may prefer a different pdf reader for security reasons // CAVEAT: JS can still force a pdf to open in-browser by bundling its own code (rare) // [SETTING] General>Applications>Portable Document Format (PDF) user_pref("pdfjs.disabled", false); // [DEFAULT: false] user_pref("pdfjs.enableScripting", false); // [FF86+] // ------------------------------------- // Disable links launching Windows Store on Windows 8/8.1/10 [WINDOWS] user_pref("network.protocol-handler.external.ms-windows-store", false); // ------------------------------------- // Enforce no system colors; they can be fingerprinted // [SETTING] General>Language and Appearance>Fonts and Colors>Colors>Use system colors user_pref("browser.display.use_system_colors", false); // [DEFAULT: false] // ------------------------------------- // Disable permissions delegation [FF73+] // Currently applies to cross-origin geolocation, camera, mic and screen-sharing // permissions, and fullscreen requests. Disabling delegation means any prompts // for these will show/use their correct 3rd party origin // https://groups.google.com/forum/#!topic/mozilla.dev.platform/BdFOMAuCGW8/discussion user_pref("permissions.delegation.enabled", false); // ------------------------------------- // Enable "window.name" protection [FF82+] // If a new page from another domain is loaded into a tab, then window.name is set to an empty string. The original // string is restored if the tab reverts back to the original page. This change prevents some cross-site attacks // https://arkenfox.github.io/TZP/tests/windownamea.html user_pref("privacy.window.name.update.enabled", true); // ------------------------------------- // Disable bypassing 3rd party extension install prompts [FF82+] // https://bugzilla.mozilla.org/buglist.cgi?bug_id=1659530,1681331 user_pref("extensions.postDownloadThirdPartyPrompt", false); // ------------------------------------- // Enforce non-native widget theme // * Security: removes/reduces system API calls, e.g. win32k API // * Fingerprinting: provides a uniform look and feel across platforms // * https://bugzilla.mozilla.org/1381938 // * https://bugzilla.mozilla.org/1411425 ***/ user_pref("widget.non-native-theme.enabled", true); // [DEFAULT: true FF89+] // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // DOWNLOADS // >>>>>>>>>>>>>>>>>>>>> // Discourage downloading to desktop // 0=desktop, 1=downloads (default), 2=last used // [SETTING] To set your default "downloads": General>Downloads>Save files to // user_pref("browser.download.folderList", 2); // ------------------------------------- // Enable user interaction for security by always asking where to download // [SETUP-CHROME] On Android this blocks longtapping and saving images // [SETTING] General>Downloads>Always ask you where to save files user_pref("browser.download.useDownloadDir", false); // ------------------------------------- // Disable adding downloads to the system's "recent documents" list user_pref("browser.download.manager.addToRecentDocs", false); // ------------------------------------- // Disable "open with" in download dialog [FF50+] [SETUP-HARDEN] // This is very useful to enable when the browser is sandboxed (e.g. via AppArmor) // in such a way that it is forbidden to run external applications. // [WARNING] This may interfere with some users' workflow or methods // https://bugzilla.mozilla.org/1281959 // user_pref("browser.download.forbid_open_with", true); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // EXTENSIONS // >>>>>>>>>>>>>>>>>>>>> // Lock down allowed extension directories // [SETUP-CHROME] This will break extensions, language packs, themes and any other // XPI files which are installed outside of profile and application directories // https://mike.kaply.com/2012/02/21/understanding-add-on-scopes/ // archived: https://archive.is/DYjAM user_pref("extensions.enabledScopes", 5); // [HIDDEN PREF] user_pref("extensions.autoDisableScopes", 15); // [DEFAULT: 15] // ------------------------------------- // Disable webextension restrictions on certain mozilla domains [FF60+] // https://bugzilla.mozilla.org/buglist.cgi?bug_id=1384330,1406795,1415644,1453988 // user_pref("extensions.webextensions.restrictedDomains", ""); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // SECURITY // >>>>>>>>>>>>>>>>>>>>> // Enforce CSP (Content Security Policy) // [NOTE] CSP is a very important and widespread security feature. Don't disable it! // https://developer.mozilla.org/docs/Web/HTTP/CSP user_pref("security.csp.enable", true); // [DEFAULT: true] // ------------------------------------- // Enforce a security delay on some confirmation dialogs such as install, open/save // https://www.squarefree.com/2004/07/01/race-conditions-in-security-dialogs/ user_pref("security.dialog_enable_delay", 1000); // [DEFAULT: 1000] // ------------------------------------- // Enable Site Isolation user_pref("fission.autostart", true); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // PERSISTENT STORAGE // >>>>>>>>>>>>>>>>>>>>> // Disable or isolate 3rd-party cookies and site-data [SETUP-WEB] // 0 = Accept cookies and site data // 1 = (Block) All third-party cookies // 2 = (Block) All cookies // 3 = (Block) Cookies from unvisited websites // 4 = (Block) Cross-site tracking cookies (default) // 5 = (Isolate All) Cross-site cookies (TCP: Total Cookie Protection / dFPI: dynamic FPI)(FF86+) // Option 5 with FPI enabled is ignored and not shown, and option 4 used instead // [NOTE] You can set cookie exceptions under site permissions or use an extension // SETTING] Privacy & Security>Enhanced Tracking Protection>Custom>Cookies // https://blog.mozilla.org/security/2021/02/23/total-cookie-protection/ user_pref("network.cookie.cookieBehavior", 1); user_pref("browser.contentblocking.category", "custom"); // ------------------------------------- // Set third-party cookies (i.e ALL) (if enabled) 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 // https://feeding.cloud.geek.nz/posts/tweaking-cookies-for-privacy-in-firefox/ user_pref("network.cookie.thirdparty.sessionOnly", true); user_pref("network.cookie.thirdparty.nonsecureSessionOnly", true); // [FF58+] // ------------------------------------- // 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 // [SETTING] Privacy & Security>Cookies and Site Data>Delete cookies and site data when Firefox is closed user_pref("network.cookie.lifetimePolicy", 2); // ------------------------------------- // 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); // ------------------------------------- // Disable offline cache (appCache) // [NOTE] In FF90+ the storage capability has been removed. // [WARNING] The API is easily fingerprinted, do not disable ***/ // user_pref("browser.cache.offline.enable", false); // ------------------------------------- // Disable service worker cache and cache storage // [NOTE] We clear service worker cache on exiting Firefox // https://w3c.github.io/ServiceWorker/#privacy // user_pref("dom.caches.enabled", false); // ------------------------------------- // 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. // https://developer.mozilla.org/docs/Web/API/StorageManager // https://developer.mozilla.org/docs/Web/API/Storage_API // https://blog.mozilla.org/l10n/2017/03/07/firefox-l10n-report-aurora-54/ // user_pref("dom.storageManager.enabled", false); // ------------------------------------- // Disable Storage Access API [FF65+] // https://developer.mozilla.org/docs/Web/API/Storage_Access_API // user_pref("dom.storage_access.enabled", false); // ------------------------------------- // Enable Local Storage Next Generation (LSNG) [FF65+] user_pref("dom.storage.next_gen", true); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // SHUTDOWN // >>>>>>>>>>>>>>>>>>>>> // Enable Firefox to clear items on shutdown // [SETTING] Privacy & Security>History>Custom Settings>Clear history when Firefox closes user_pref("privacy.sanitize.sanitizeOnShutdown", true); // ------------------------------------- // Set what items to clear on shutdown [SETUP-CHROME] // [NOTE] If 'history' is true, downloads will also be cleared regardless of the value // but if 'history' is false, downloads can still be cleared independently // However, this may not always be the case. The interface combines and syncs these // prefs when set from there, and the sanitize code may change at any time // [SETTING] Privacy & Security>History>Custom Settings>Clear history when Firefox closes>Settings user_pref("privacy.clearOnShutdown.cache", true); user_pref("privacy.clearOnShutdown.cookies", true); user_pref("privacy.clearOnShutdown.downloads", true); // see note above user_pref("privacy.clearOnShutdown.formdata", true); // Form & Search History user_pref("privacy.clearOnShutdown.history", true); // Browsing & Download History user_pref("privacy.clearOnShutdown.offlineApps", true); // Offline Website Data user_pref("privacy.clearOnShutdown.sessions", true); // Active Logins user_pref("privacy.clearOnShutdown.siteSettings", false); // Site Preferences // ------------------------------------- // Reset default items to clear with Ctrl-Shift-Del [SETUP-CHROME] // This dialog can also be accessed from the menu History>Clear Recent History // Firefox remembers your last choices. This will reset them when you start Firefox. // [NOTE] Regardless of what you set privacy.cpd.downloads to, as soon as the dialog // for "Clear Recent History" is opened, it is synced to the same as 'history' user_pref("privacy.cpd.cache", true); user_pref("privacy.cpd.cookies", true); // user_pref("privacy.cpd.downloads", true); // not used, see note above user_pref("privacy.cpd.formdata", true); // Form & Search History user_pref("privacy.cpd.history", true); // Browsing & Download History user_pref("privacy.cpd.offlineApps", true); // Offline Website Data user_pref("privacy.cpd.passwords", false); // this is not listed user_pref("privacy.cpd.sessions", true); // Active Logins user_pref("privacy.cpd.siteSettings", false); // Site Preferences // ------------------------------------- // Clear Session Restore data when sanitizing on shutdown or manually [FF34+] // [NOTE] Not needed if Session Restore is not used or is already cleared with history // [NOTE] privacy.clearOnShutdown.openWindows prevents resuming from crashes // [NOTE] privacy.cpd.openWindows has a bug that causes an additional window to open // user_pref("privacy.clearOnShutdown.openWindows", true); // user_pref("privacy.cpd.openWindows", true); // ------------------------------------- // Reset default 'Time range to clear' for 'Clear Recent History' // 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); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // FPI (FIRST PARTY ISOLATION) // >>>>>>>>>>>>>>>>>>>>> // Enable First Party Isolation [FF51+] // [SETUP-WEB] May break cross-domain logins and site functionality until perfected // https://bugzilla.mozilla.org/buglist.cgi?bug_id=1260931,1299996 user_pref("privacy.firstparty.isolate", true); // ------------------------------------- // Enforce FPI restriction for window.opener [FF54+] // [NOTE] Setting this to false may reduce the breakage // FF65+ blocks postMessage with targetOrigin "*" if originAttributes don't match. But // to reduce breakage it ignores the 1st-party domain (FPD) originAttribute // The 2nd pref removes that limitation and will only allow communication if FPDs also match. // https://bugzilla.mozilla.org/1319773#c22 // https://bugzilla.mozilla.org/1492607 // https://developer.mozilla.org/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); // ------------------------------------- // Enable scheme with FPI [FF78+] // [NOTE] Experimental: existing data and site permissions are incompatible // and some site exceptions may not work e.g. HTTPS-only mode // user_pref("privacy.firstparty.isolate.use_site", true); // ------------------------------------- // Enable site partitioning (FF78+) // https://bugzilla.mozilla.org/1590107 [META] user_pref("privacy.partition.network_state", true); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // RFP (RESIST FINGERPRINTING) // >>>>>>>>>>>>>>>>>>>>> // Enable privacy.resistFingerprinting [FF41+] // [SETUP-WEB] RFP can cause the odd website to break in strange ways, and has a few side affects, // but is largely robust nowadays. Give it a try. Your choice. // https://bugzilla.mozilla.org/418986 user_pref("privacy.resistFingerprinting", true); // ------------------------------------- // 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 // https://bugzilla.mozilla.org/1330882 // user_pref("privacy.window.maxInnerWidth", 1000); // user_pref("privacy.window.maxInnerHeight", 1000); // ------------------------------------- // 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 to keep that side-effect // https://bugzilla.mozilla.org/buglist.cgi?bug_id=1384330,1406795,1415644,1453988 user_pref("privacy.resistFingerprinting.block_mozAddonManager", true); // [HIDDEN PREF] user_pref("extensions.webextensions.restrictedDomains", ""); user_pref("extensions.webextensions.identity.redirectDomain", ""); // ------------------------------------- // Enable RFP letterboxing [FF67+] // Dynamically resizes the inner window by applying margins in stepped ranges // If you use the dimension pref, then it will only apply those resolutions. The format is // "width1xheight1, width2xheight2, ..." (e.g. "800x600, 1000x1000, 1600x900") // [WARNING] DO NOT USE: the dimension pref is only meant for testing // https://bugzilla.mozilla.org/1407366 // https://hg.mozilla.org/mozilla-central/rev/6d2d7856e468#l2.32 ***/ // user_pref("privacy.resistFingerprinting.letterboxing", true); // [HIDDEN PREF] // user_pref("privacy.resistFingerprinting.letterboxing.dimensions", ""); // [HIDDEN PREF] // ------------------------------------- // Experimental RFP [FF91+] // [WARNING] DO NOT USE unless testing // https://bugzilla.mozilla.org/1635603 ***/ // user_pref("privacy.resistFingerprinting.exemptedDomains", "*.example.invalid"); // user_pref("privacy.resistFingerprinting.testGranularityMask", 0); // ------------------------------------- // Disable showing about:blank as soon as possible during startup [FF60+] // When default true this no longer masks the RFP chrome resizing activity // https://bugzilla.mozilla.org/1448423 user_pref("browser.startup.blankWindow", false); // ------------------------------------- // Disable chrome animations [FF77+] [RESTART] // [NOTE] pref added in FF63, but applied to chrome in FF77. RFP spoofs this for web content user_pref("ui.prefersReducedMotion", 1); // [HIDDEN PREF] // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // RFP ALTERNATIVES // >>>>>>>>>>>>>>>>>>>>> // Spoof number of CPU cores [FF48+] // user_pref("dom.maxHardwareConcurrency", 2); // ------------------------------------- // Disable Resource Timing API // user_pref("dom.enable_resource_timing", false); // ------------------------------------- // Disable Navigation Timing API // user_pref("dom.enable_performance", false); // ------------------------------------- // Disable device sensor API user_pref("device.sensors.enabled", false); // ------------------------------------- // Disable remembering site specific zoom // user_pref("browser.zoom.siteSpecific", false); // ------------------------------------- // Disable gamepad API - USB device ID enumeration // user_pref("dom.gamepad.enabled", false); // ------------------------------------- // Disable Network Information API [FF31+] user_pref("dom.netinfo.enabled", false); // [DEFAULT: true on Android] // ------------------------------------- // Disable the SpeechSynthesis (Text-to-Speech) part of the Web Speech API // user_pref("media.webspeech.synth.enabled", false); // ------------------------------------- // Disable video statistics to mitigate JS performance fingerprinting [FF25+] // user_pref("media.video_stats.enabled", false); // ------------------------------------- // Disable touch events [FENNEC BUG] user_pref("dom.w3c_touch_events.enabled", 1); // ------------------------------------- // Disable media device enumeration [FF29+] user_pref("media.navigator.enabled", false); // ------------------------------------- // Disable MediaDevices change detection [FF51+] // user_pref("media.ondevicechange.enabled", false); // ------------------------------------- // Disable WebGL debug info being available to websites // user_pref("webgl.enable-debug-renderer-info", false); // ------------------------------------- // Enforce prefers-reduced-motion as no-preference [FF63+] [RESTART] // 0=no-preference, 1=reduce // user_pref("ui.prefersReducedMotion", 0); // [HIDDEN PREF] // ------------------------------------- // Disable exposure of system colors to CSS or canvas [FF44+] // user_pref("ui.use_standins_for_native_colors", true); // ------------------------------------- // Enforce prefers-color-scheme as light [FF67+] // 0=light, 1=dark : This overrides your OS value // user_pref("ui.systemUsesDarkTheme", 0); // [HIDDEN PREF] // ------------------------------------- // Disable Web Audio API [FF51+] user_pref("dom.webaudio.enabled", false); // ------------------------------------- // Limit font visibility (Windows, Mac, some Linux) [FF79+] // Uses hardcoded lists with two parts: kBaseFonts + kLangPackFonts [1], bundled fonts are auto-allowed // 1=only base system fonts, 2=also fonts from optional language packs, 3=also user-installed fonts // https://searchfox.org/mozilla-central/search?path=StandardFonts*.inc ***/ // user_pref("layout.css.font-visibility.level", 1); // ------------------------------------- // Navigator DOM object overrides // [WARNING] NO NOT USE: these prefs are insufficient and leak // user_pref("general.appname.override", ""); // [HIDDEN PREF] // user_pref("general.appversion.override", ""); // [HIDDEN PREF] // user_pref("general.buildID.override", "20181001000000"); // [HIDDEN PREF] // user_pref("general.oscpu.override", ""); // [HIDDEN PREF] // user_pref("general.platform.override", ""); // [HIDDEN PREF] // user_pref("general.useragent.override", "Mozilla/5.0 (Android 9; Mobile; rv:78.0) Gecko/78.0 Firefox/78.0"); // [HIDDEN PREF] // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // PERSONAL // >>>>>>>>>>>>>>>>>>>>> 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("browser.warnOnQuit", false); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // APPEARANCE // >>>>>>>>>>>>>>>>>>>>> // user_pref("browser.download.autohideButton", false); // [FF57+] // user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true); // [FF68+] allow userChrome/userContent // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // CONTENT BEHAVIOR // >>>>>>>>>>>>>>>>>>>>> user_pref("accessibility.typeaheadfind", false); // enable "Find As You Type" user_pref("clipboard.autocopy", false); // disable autocopy default [LINUX] user_pref("layout.spellcheckDefault", 0); // 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.quitShortcut.disabled", true); // disable Ctrl-Q quit shortcut [LINUX] [MAC] [FF87+] // 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 [DEFAULT: false on Linux] // user_pref("ui.key.menuAccessKey", 0); // disable alt key toggling the menu bar [RESTART] // user_pref("view_source.tab", false); // view "page/selection source" in a new window [FF68+, FF59 and under] // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // UX FEATURES: Disable and hide the icons and menus // >>>>>>>>>>>>>>>>>>>>> user_pref("browser.messaging-system.whatsNewPanel.enabled", false); // What's New toolbar icon [FF69+] user_pref("messaging-system.rsexperimentloader.enabled", false); user_pref("extensions.pocket.enabled", false); // Pocket Account [FF46+] user_pref("identity.fxaccounts.enabled", false); // Firefox Accounts & Sync [FF60+] [RESTART] user_pref("reader.parse-on-load.enabled", false); // Reader View // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // OTHER // >>>>>>>>>>>>>>>>>>>>> // user_pref("browser.bookmarks.max_backups", 2); user_pref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.addons", false); // disable CFR [FF67+] user_pref("browser.newtabpage.activity-stream.improvesearch.topSiteSearchShortcuts.searchEngines" ""); // [SETTING] General>Browsing>Recommend extensions as you browse user_pref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.features", false); // disable CFR [FF67+] // [SETTING] General>Browsing>Recommend features as you browse user_pref("network.manage-offline-status", false); // see bugzilla 620472 // user_pref("xpinstall.signatures.required", false); // enforced extension signing (Nightly/ESR) user_pref("xpinstall.signatures.devInfoURL", ""); user_pref("webextensions.storage.sync.serverURL", ""); user_pref("lightweightThemes.getMoreURL", ""); user_pref("remote.enabled", false); user_pref("javascript.options.shared_memory", false); user_pref("default-browser-agent.enabled", false); // ------------------------------------- // Test user.js in about:config user_pref("_config.applied", true); // // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> // DEPRECATED / REMOVED / LEGACY / RENAMED // >>>>>>>>>>>>>>>>>>>>> // FF79 // Enforce fallback text encoding to match en-US // When the content or server doesn't declare a charset the browser will // fallback to the "Current locale" based on your application language // [TEST] https://hsivonen.com/test/moz/check-charset.htm // https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/20025 // https://bugzilla.mozilla.org/1603712 user_pref("intl.charset.fallback.override", "windows-1252"); // ------------------------------------- // FF82 // Disable geographically specific results/search engines e.g. "browser.search.*.US" // i.e. ignore all of Mozilla's various search engines in multiple locales // https://bugzilla.mozilla.org/1619926 user_pref("browser.search.geoSpecificDefaults", false); user_pref("browser.search.geoSpecificDefaults.url", ""); // ------------------------------------- // FF86 // Disable SSL Error Reporting // https://firefox-source-docs.mozilla.org/browser/base/sslerrorreport/preferences.html // https://bugzilla.mozilla.org/1681839 user_pref("security.ssl.errorReporting.automatic", false); user_pref("security.ssl.errorReporting.enabled", false); user_pref("security.ssl.errorReporting.url", ""); // ------------------------------------- // Disable hiding mime types (Options>General>Applications) not associated with a plugin // https://bugzilla.mozilla.org/1581678 user_pref("browser.download.hide_plugins_without_extensions", false); // ------------------------------------- // FF87 // Disable Activity Stream recent Highlights in the Library [FF57+] // https://bugzilla.mozilla.org/1689405 user_pref("browser.library.activity-stream.enabled", false); // ------------------------------------- // Disable PointerEvents // https://developer.mozilla.org/docs/Web/API/PointerEvent // https://bugzilla.mozilla.org/1688105 user_pref("dom.w3c_pointer_events.enabled", false); // ------------------------------------- // FF89 // Disable sending Flash crash reports // https://bugzilla.mozilla.org/1682030 [underlying NPAPI code removed] user_pref("dom.ipc.plugins.flash.subprocess.crashreporter.enabled", false); // ------------------------------------- // Disable sending the URL of the website where a plugin crashed // https://bugzilla.mozilla.org/1682030 [underlying NPAPI code removed] user_pref("dom.ipc.plugins.reportCrashURL", false); // ------------------------------------- // Block unencrypted requests from Flash on encrypted pages to mitigate MitM attacks [FF59+] // https://bugzilla.mozilla.org/1190623 // https://bugzilla.mozilla.org/1682030 [underlying NPAPI code removed] user_pref("security.mixed_content.block_object_subrequest", true); // ------------------------------------- // Disable Flash plugin // 0=deactivated, 1=ask, 2=enabled // ESR52.x is the last branch to *fully* support NPAPI, FF52+ stable only supports Flash // [NOTE] You can still override individual sites via site permissions // https://bugzilla.mozilla.org/1682030 [underlying NPAPI code removed] user_pref("plugin.state.flash", 0); // [DEFAULT: 1] // ------------------------------------- // Disable FTP [FF60+] // https://bugzilla.mozilla.org/1574475 // user_pref("network.ftp.enabled", false); // [DEFAULT: false FF88+] // ------------------------------------- // Enforce no offline cache storage (appCache) [FF71+] // https://bugzilla.mozilla.org/1694662 user_pref("browser.cache.offline.storage.enable", false); // [DEFAULT: false FF84+] // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> //