/******************************************************************************
* user.js *
*
https://github.com/pyllyukko/user.js *
******************************************************************************/
/******************************************************************************
* SECTION: HTML5 / APIs / DOM *
******************************************************************************/
// PREF: Disable Service Workers
//
https://developer.mozilla.org/en-US/docs/Web/API/Worker//
https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker_API//
https://wiki.mozilla.org/Firefox/Push_Notifications#Service_Workers// NOTICE: Disabling ServiceWorkers breaks functionality on some sites (Google Street View...)
// Unknown security implications
// CVE-2016-5259, CVE-2016-2812, CVE-2016-1949, CVE-2016-5287 (fixed)
user_pref("dom.serviceWorkers.enabled", false);
// PREF: Disable Web Workers
//
https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers//
https://www.w3schools.com/html/html5_webworkers.asp// NOTICE: Disabling Web Workers breaks "Download as ZIP" functionality on
https://mega.nz/, WhatsApp Web and probably others
user_pref("dom.workers.enabled", false);
// PREF: Disable web notifications
//
https://support.mozilla.org/t5/Firefox/I-can-t-find-Firefox-menu-I-m-trying-to-opt-out-of-Web-Push-and/m-p/1317495#M1006501user_pref("dom.webnotifications.enabled", false);
// PREF: Disable DOM timing API
//
https://wiki.mozilla.org/Security/Reviews/Firefox/NavigationTimingAPI//
https://www.w3.org/TR/navigation-timing/#privacyuser_pref("dom.enable_performance", false);
// PREF: Make sure the User Timing API does not provide a new high resolution timestamp
//
https://trac.torproject.org/projects/tor/ticket/16336//
https://www.w3.org/TR/2013/REC-user-timing-20131212/#privacy-securityuser_pref("dom.enable_user_timing", false);
// PREF: Disable Web Audio API
//
https://bugzilla.mozilla.org/show_bug.cgi?id=1288359user_pref("dom.webaudio.enabled", false);
// PREF: Disable Location-Aware Browsing (geolocation)
//
https://www.mozilla.org/en-US/firefox/geolocation/user_pref("geo.enabled", false);
// PREF: When geolocation is enabled, use Mozilla geolocation service instead of Google
//
https://bugzilla.mozilla.org/show_bug.cgi?id=689252user_pref("geo.wifi.uri", "
https://location.services.mozilla.com/v1/geolocate?key=%MOZILLA_API_KEY%");
// PREF: When geolocation is enabled, don't log geolocation requests to the console
user_pref("geo.wifi.logging.enabled", false);
// PREF: Disable raw TCP socket support (mozTCPSocket)
//
https://trac.torproject.org/projects/tor/ticket/18863//
https://www.mozilla.org/en-US/security/advisories/mfsa2015-97///
https://developer.mozilla.org/docs/Mozilla/B2G_OS/API/TCPSocketuser_pref("dom.mozTCPSocket.enabled", false);
// PREF: Disable DOM storage (disabled)
//
http://kb.mozillazine.org/Dom.storage.enabled//
https://html.spec.whatwg.org/multipage/webstorage.html// NOTICE-DISABLED: Disabling DOM storage is known to cause`TypeError: localStorage is null` errors
//user_pref("dom.storage.enabled", false);
// PREF: Disable leaking network/browser connection information via _javascript_
// Network Information API provides general information about the system's connection type (WiFi, cellular, etc.)
//
https://developer.mozilla.org/en-US/docs/Web/API/Network_Information_API//
https://wicg.github.io/netinfo/#privacy-considerations//
https://bugzilla.mozilla.org/show_bug.cgi?id=960426user_pref("dom.netinfo.enabled", false);
// PREF: Disable network API (Firefox < 32)
//
https://developer.mozilla.org/en-US/docs/Web/API/Connection/onchange//
https://www.torproject.org/projects/torbrowser/design/#fingerprinting-defensesuser_pref("dom.network.enabled", false);
// PREF: Disable WebRTC entirely to prevent leaking internal IP addresses (Firefox < 42)
// NOTICE: Disabling WebRTC breaks peer-to-peer file sharing tools (
reep.io ...)
user_pref("media.peerconnection.enabled", false);
// PREF: Don't reveal your internal IP when WebRTC is enabled (Firefox >= 42)
//
https://wiki.mozilla.org/Media/WebRTC/Privacy//
https://github.com/beefproject/beef/wiki/Module%3A-Get-Internal-IP-WebRTCuser_pref("media.peerconnection.ice.default_address_only", true); // Firefox 42-51
user_pref("media.peerconnection.ice.no_host", true); // Firefox >= 52
// PREF: Disable WebRTC getUserMedia, screen sharing, audio capture, video capture
//
https://wiki.mozilla.org/Media/getUserMedia//
https://blog.mozilla.org/futurereleases/2013/01/12/capture-local-camera-and-microphone-streams-with-getusermedia-now-enabled-in-firefox///
https://developer.mozilla.org/en-US/docs/Web/API/Navigatoruser_pref("media.navigator.enabled", false);
user_pref("media.navigator.video.enabled", false);
user_pref("media.getusermedia.screensharing.enabled", false);
user_pref("media.getusermedia.audiocapture.enabled", false);
// PREF: Disable battery API (Firefox < 52)
//
https://developer.mozilla.org/en-US/docs/Web/API/BatteryManager//
https://bugzilla.mozilla.org/show_bug.cgi?id=1313580user_pref("dom.battery.enabled", false);
// PREF: Disable telephony API
//
https://wiki.mozilla.org/WebAPI/Security/WebTelephonyuser_pref("dom.telephony.enabled", false);
// PREF: Disable "beacon" asynchronous HTTP transfers (used for analytics)
//
https://developer.mozilla.org/en-US/docs/Web/API/navigator.sendBeaconuser_pref("beacon.enabled", false);
user_pref("browser.beacon.enabled, false);
// PREF: Disable clipboard event detection (onCut/onCopy/onPaste) via _javascript_
// NOTICE: Disabling clipboard events breaks Ctrl+C/X/V copy/cut/paste functionaility in JS-based web applications (Google Docs...)
//
https://developer.mozilla.org/en-US/docs/Mozilla/Preferences/Preference_reference/dom.event.clipboardevents.enableduser_pref("dom.event.clipboardevents.enabled", false);
// PREF: Disable "copy to clipboard" functionality via _javascript_ (Firefox >= 41)
// NOTICE: Disabling clipboard operations will break legitimate JS-based "copy to clipboard" functionality
//
https://hg.mozilla.org/mozilla-central/rev/2f9f8ea4b9c3user_pref("dom.allow_cut_copy", false);
// PREF: Disable speech recognition
//
https://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html//
https://developer.mozilla.org/en-US/docs/Web/API/SpeechRecognition//
https://wiki.mozilla.org/HTML5_Speech_APIuser_pref("media.webspeech.recognition.enable", false);
// PREF: Disable speech synthesis
//
https://developer.mozilla.org/en-US/docs/Web/API/SpeechSynthesisuser_pref("media.webspeech.synth.enabled", false);
// PREF: Disable sensor API
//
https://wiki.mozilla.org/Sensor_APIuser_pref("device.sensors.enabled", false);
// PREF: Disable pinging URIs specified in HTML <a> ping= attributes
//
http://kb.mozillazine.org/Browser.send_pingsuser_pref("browser.send_pings", false);
// PREF: When browser pings are enabled, only allow pinging the same host as the origin page
//
http://kb.mozillazine.org/Browser.send_pings.require_same_hostuser_pref("browser.send_pings.require_same_host", true);
// PREF: Disable IndexedDB (disabled)
//
https://developer.mozilla.org/en-US/docs/IndexedDB//
https://en.wikipedia.org/wiki/Indexed_Database_API//
https://wiki.mozilla.org/Security/Reviews/Firefox4/IndexedDB_Security_Review//
http://forums.mozillazine.org/viewtopic.php?p=13842047//
https://github.com/pyllyukko/user.js/issues/8// NOTICE-DISABLED: IndexedDB could be used for tracking purposes, but is required for some add-ons to work (notably uBlock), so is left enabled
//user_pref("dom.indexedDB.enabled", false);
// TODO: "Access Your Location" "Maintain Offline Storage" "Show Notifications"
// PREF: Disable gamepad API to prevent USB device enumeration
//
https://www.w3.org/TR/gamepad///
https://trac.torproject.org/projects/tor/ticket/13023user_pref("dom.gamepad.enabled", false);
// PREF: Disable virtual reality devices APIs
//
https://developer.mozilla.org/en-US/Firefox/Releases/36#Interfaces.2FAPIs.2FDOM//
https://developer.mozilla.org/en-US/docs/Web/API/WebVR_APIuser_pref("dom.vr.enabled", false);
// PREF: Disable vibrator API
user_pref("dom.vibrator.enabled", false);
// PREF: Disable resource timing API
//
https://www.w3.org/TR/resource-timing/#privacy-securityuser_pref("dom.enable_resource_timing", false);
// PREF: Disable Archive API (Firefox < 54)
//
https://wiki.mozilla.org/WebAPI/ArchiveAPI//
https://bugzilla.mozilla.org/show_bug.cgi?id=1342361user_pref("dom.archivereader.enabled", false);
// PREF: Disable webGL
//
https://en.wikipedia.org/wiki/WebGL//
https://www.contextis.com/resources/blog/webgl-new-dimension-browser-exploitation/user_pref("webgl.disabled", true);
// PREF: When webGL is enabled, use the minimum capability mode
user_pref("webgl.min_capability_mode", true);
// PREF: When webGL is enabled, disable webGL extensions
//
https://developer.mozilla.org/en-US/docs/Web/API/WebGL_API#WebGL_debugging_and_testinguser_pref("webgl.disable-extensions", true);
// PREF: When webGL is enabled, force enabling it even when layer acceleration is not supported
//
https://trac.torproject.org/projects/tor/ticket/18603user_pref("webgl.disable-fail-if-major-performance-caveat", true);
// PREF: When webGL is enabled, do not expose information about the graphics driver
//
https://bugzilla.mozilla.org/show_bug.cgi?id=1171228//
https://developer.mozilla.org/en-US/docs/Web/API/WEBGL_debug_renderer_infouser_pref("webgl.enable-debug-renderer-info", false);
// somewhat related...
//user_pref("pdfjs.enableWebGL", false);
// PREF: Spoof dual-core CPU
//
https://trac.torproject.org/projects/tor/ticket/21675//
https://bugzilla.mozilla.org/show_bug.cgi?id=1360039user_pref("dom.maxHardwareConcurrency", 2);
/******************************************************************************
* SECTION: Misc *
******************************************************************************/
// PREF: Disable face detection
user_pref("camera.control.face_detection.enabled", false);
user_pref("camera.control.autofocus_moving_callback.enabled"), false);
// PREF: Disable sensors
user_pref("device.sensors.enabled"), false);
// PREF: Set the default search engine to DuckDuckGo (disabled)
//
https://support.mozilla.org/en-US/questions/948134//user_pref("browser.search.defaultenginename", "DuckDuckGo");
//user_pref("browser.search.order.1", "DuckDuckGo");
//user_pref("keyword.URL", "
https://duckduckgo.com/html/?q=!+");
// PREF: Disable GeoIP lookup on your address to set default search engine region
//
https://trac.torproject.org/projects/tor/ticket/16254//
https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_geolocation-for-default-search-engineuser_pref("browser.search.countryCode", "US");
user_pref("browser.search.region", "US");
user_pref("browser.search.geoip.url", "");
// PREF: Set Accept-Language HTTP header to en-US regardless of Firefox localization
//
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Languageuser_pref("intl.accept_languages", "en-us, en");
// PREF: Don't use OS values to determine locale, force using Firefox locale setting
//
http://kb.mozillazine.org/Intl.locale.matchOSuser_pref("intl.locale.matchOS", false);
// PREF: Don't use Mozilla-provided location-specific search engines
user_pref("browser.search.geoSpecificDefaults", false);
// PREF: Do not automatically send selection to clipboard on some Linux platforms
//
http://kb.mozillazine.org/Clipboard.autocopyuser_pref("clipboard.autocopy", false);
// PREF: Prevent leaking application locale/date format using _javascript_
//
https://bugzilla.mozilla.org/show_bug.cgi?id=867501//
https://hg.mozilla.org/mozilla-central/rev/52d635f2b33duser_pref("_javascript_.use_us_english_locale", true);
// PREF: Do not submit invalid URIs entered in the address bar to the default search engine
//
http://kb.mozillazine.org/Keyword.enableduser_pref("keyword.enabled", false);
// PREF: Don't trim HTTP off of URLs in the address bar.
//
https://bugzilla.mozilla.org/show_bug.cgi?id=665580user_pref("browser.urlbar.trimURLs", false);
// PREF: Don't try to guess domain names when entering an invalid domain name in URL bar
//
http://www-archive.mozilla.org/docs/end-user/domain-guessing.htmluser_pref("browser.fixup.alternate.enabled", false);
// PREF: When browser.fixup.alternate.enabled is enabled, strip password from 'user:address@hidden' URLs
//
https://github.com/pyllyukko/user.js/issues/290#issuecomment-303560851user_pref("browser.fixup.hide_user_pass", true);
// PREF: Send DNS request through SOCKS when SOCKS proxying is in use
//
https://trac.torproject.org/projects/tor/wiki/doc/TorifyHOWTO/WebBrowsersuser_pref("network.proxy.socks_remote_dns", true);
// PREF: Don't monitor OS online/offline connection state
//
https://trac.torproject.org/projects/tor/ticket/18945user_pref("network.manage-offline-status", false);
// PREF: Enforce Mixed Active Content Blocking
//
https://support.mozilla.org/t5/Protect-your-privacy/Mixed-content-blocking-in-Firefox/ta-p/10990//
https://developer.mozilla.org/en-US/docs/Site_Compatibility_for_Firefox_23#Non-SSL_contents_on_SSL_pages_are_blocked_by_default//
https://blog.mozilla.org/tanvi/2013/04/10/mixed-content-blocking-enabled-in-firefox-23/user_pref("security.mixed_content.block_active_content", true);
// PREF: Enforce Mixed Passive Content blocking (a.k.a. Mixed Display Content)
// NOTICE: Enabling Mixed Display Content blocking can prevent images/styles... from loading properly when connection to the website is only partially secured
user_pref("security.mixed_content.block_display_content", true);
// PREF: Disable JAR from opening Unsafe File Types
//
http://kb.mozillazine.org/Network.jar.open-unsafe-types// CIS Mozilla Firefox 24 ESR v1.0.0 - 3.7
user_pref("network.jar.open-unsafe-types", false);
// CIS 2.7.4 Disable Scripting of Plugins by _javascript_
//
http://forums.mozillazine.org/viewtopic.php?f=7&t=153889user_pref("security.xpconnect.plugin.unrestricted", false);
// PREF: Set File URI Origin Policy
//
http://kb.mozillazine.org/Security.fileuri.strict_origin_policy// CIS Mozilla Firefox 24 ESR v1.0.0 - 3.8
user_pref("security.fileuri.strict_origin_policy", true);
// PREF: Disable Displaying _javascript_ in History URLs
//
http://kb.mozillazine.org/Browser.urlbar.filter._javascript_// CIS 2.3.6
user_pref("browser.urlbar.filter._javascript_", true);
// PREF: Disable asm.js
//
http://asmjs.org///
https://www.mozilla.org/en-US/security/advisories/mfsa2015-29///
https://www.mozilla.org/en-US/security/advisories/mfsa2015-50///
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2712user_pref("_javascript_.options.asmjs", false);
// PREF: Disable SVG in OpenType fonts
//
https://wiki.mozilla.org/SVGOpenTypeFonts//
https://github.com/iSECPartners/publications/tree/master/reports/Tor%20Browser%20Bundleuser_pref("gfx.font_rendering.opentype_svg.enabled", false);
// PREF: Disable in-content SVG rendering (Firefox >= 53)
// NOTICE: Disabling SVG support breaks many UI elements on many sites
//
https://bugzilla.mozilla.org/show_bug.cgi?id=1216893//
https://github.com/iSECPartners/publications/raw/master/reports/Tor%20Browser%20Bundle/Tor%20Browser%20Bundle%20-%20iSEC%20Deliverable%201.3.pdf#16user_pref("svg.disabled", true);
// PREF: Disable video stats to reduce fingerprinting threat
//
https://bugzilla.mozilla.org/show_bug.cgi?id=654550//
https://github.com/pyllyukko/user.js/issues/9#issuecomment-100468785//
https://github.com/pyllyukko/user.js/issues/9#issuecomment-148922065user_pref("media.video_stats.enabled", false);
// PREF: Don't reveal build ID
// Value taken from Tor Browser
//
https://bugzilla.mozilla.org/show_bug.cgi?id=583181user_pref("general.buildID.override", "20100101");
user_pref("browser.startup.homepage_override.buildID", "20100101");
// PREF: Prevent font fingerprinting
//
https://browserleaks.com/fonts//
https://github.com/pyllyukko/user.js/issues/120user_pref("browser.display.use_document_fonts", 0);
// PREF: Enable only whitelisted URL protocol handlers
//
http://kb.mozillazine.org/Network.protocol-handler.external-default//
http://kb.mozillazine.org/Network.protocol-handler.warn-external-default//
http://kb.mozillazine.org/Network.protocol-handler.expose.%28protocol%29//
https://news.ycombinator.com/item?id=13047883//
https://bugzilla.mozilla.org/show_bug.cgi?id=167475//
https://github.com/pyllyukko/user.js/pull/285#issuecomment-298124005// NOTICE: Disabling nonessential protocols breaks all interaction with custom protocols such as mailto:, irc:, magnet: ... and breaks opening third-party mail/messaging/torrent/... clients when clicking on links with these protocols
// TODO: Add externally-handled protocols from Windows 8.1 and Windows 10 (currently contains protocols only from Linux and Windows 7) that might pose a similar threat (see e.g.
https://news.ycombinator.com/item?id=13044991)
// TODO: Add externally-handled protocols from Mac OS X that might pose a similar threat (see e.g.
https://news.ycombinator.com/item?id=13044991)
// If you want to enable a protocol, set network.protocol-handler.expose.(protocol) to true and network.protocol-handler.external.(protocol) to:
// * true, if the protocol should be handled by an external application
// * false, if the protocol should be handled internally by Firefox
user_pref("network.protocol-handler.warn-external-default", true);
user_pref("network.protocol-handler.external.http", false);
user_pref("network.protocol-handler.external.https", false);
user_pref("network.protocol-handler.external._javascript_", false);
user_pref("network.protocol-handler.external.moz-extension", false);
user_pref("network.protocol-handler.external.ftp", false);
user_pref("network.protocol-handler.external.file", false);
user_pref("network.protocol-handler.external.about", false);
user_pref("network.protocol-handler.external.chrome", false);
user_pref("network.protocol-handler.external.blob", false);
user_pref("network.protocol-handler.external.data", false);
user_pref("network.protocol-handler.expose-all", false);
user_pref("network.protocol-handler.expose.http", true);
user_pref("network.protocol-handler.expose.https", true);
user_pref("network.protocol-handler.expose._javascript_", true);
user_pref("network.protocol-handler.expose.moz-extension", true);
user_pref("network.protocol-handler.expose.ftp", true);
user_pref("network.protocol-handler.expose.file", true);
user_pref("network.protocol-handler.expose.about", true);
user_pref("network.protocol-handler.expose.chrome", true);
user_pref("network.protocol-handler.expose.blob", true);
user_pref("network.protocol-handler.expose.data", true);
/******************************************************************************
* SECTION: Extensions / plugins *
******************************************************************************/
// PREF: Ensure you have a security delay when installing add-ons (milliseconds)
//
http://kb.mozillazine.org/Disable_extension_install_delay_-_Firefox//
http://www.squarefree.com/2004/07/01/race-conditions-in-security-dialogs/user_pref("security.dialog_enable_delay", 1000);
// PREF: Require signatures
//
https://wiki.mozilla.org/Addons/Extension_Signing//user_pref("xpinstall.signatures.required", true);
// PREF: Opt-out of add-on metadata updates
//
https://blog.mozilla.org/addons/how-to-opt-out-of-add-on-metadata-updates/user_pref("extensions.getAddons.cache.enabled", false);
// PREF: Opt-out of themes (Persona) updates
//
https://support.mozilla.org/t5/Firefox/how-do-I-prevent-autoamtic-updates-in-a-50-user-environment/td-p/144287user_pref("lightweightThemes.update.enabled", false);
// PREF: Disable Flash Player NPAPI plugin
//
http://kb.mozillazine.org/Flash_pluginuser_pref("plugin.state.flash", 0);
// PREF: Disable Java NPAPI plugin
user_pref("plugin.state.java", 0);
// PREF: Disable sending Flash Player crash reports
user_pref("dom.ipc.plugins.flash.subprocess.crashreporter.enabled", false);
// PREF: When Flash crash reports are enabled, don't send the visited URL in the crash report
user_pref("dom.ipc.plugins.reportCrashURL", false);
// PREF: When Flash is enabled, download and use Mozilla SWF URIs blocklist
//
https://bugzilla.mozilla.org/show_bug.cgi?id=1237198//
https://github.com/mozilla-services/shavar-plugin-blocklistuser_pref("browser.safebrowsing.blockedURIs.enabled", false);
// PREF: Disable Shumway (Mozilla Flash renderer)
//
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/Shumwayuser_pref("shumway.disabled", true);
// PREF: Disable Gnome Shell Integration NPAPI plugin
user_pref("plugin.state.libgnome-shell-browser-plugin", 0);
// PREF: Disable the bundled OpenH264 video codec (disabled)
//
http://forums.mozillazine.org/viewtopic.php?p=13845077&sid=28af2622e8bd8497b9113851676846b1#p13845077//user_pref("media.gmp-provider.enabled", false);
// PREF: Enable plugins click-to-play
//
https://wiki.mozilla.org/Firefox/Click_To_Play//
https://blog.mozilla.org/security/2012/10/11/click-to-play-plugins-blocklist-style/user_pref("plugins.click_to_play", true);
// PREF: Updates addons automatically
//
https://blog.mozilla.org/addons/how-to-turn-off-add-on-updates/user_pref("extensions.update.enabled", true);
// PREF: Enable add-on and certificate blocklists (OneCRL) from Mozilla
//
https://wiki.mozilla.org/Blocklisting//
https://blocked.cdn.mozilla.net///
http://kb.mozillazine.org/Extensions.blocklist.enabled//
http://kb.mozillazine.org/Extensions.blocklist.url//
https://blog.mozilla.org/security/2015/03/03/revoking-intermediate-certificates-introducing-onecrl/// Updated at interval defined in extensions.blocklist.interval (default: 86400)
user_pref("extensions.blocklist.enabled", true);
user_pref("services.blocklist.update_enabled", true);
// PREF: Decrease system information leakage to Mozilla blocklist update servers
//
https://trac.torproject.org/projects/tor/ticket/16931user_pref("extensions.blocklist.url", "
https://blocklist.addons.mozilla.org/blocklist/3/%APP_ID%/%APP_VERSION%/");
/******************************************************************************
* SECTION: Firefox (anti-)features / components * *
******************************************************************************/
// PREF: Disable WebIDE
//
https://trac.torproject.org/projects/tor/ticket/16222//
https://developer.mozilla.org/docs/Tools/WebIDEuser_pref("devtools.webide.enabled", false);
user_pref("devtools.webide.autoinstallADBHelper", false);
user_pref("devtools.webide.autoinstallFxdtAdapters", false);
// PREF: Disable remote debugging
//
https://developer.mozilla.org/en-US/docs/Tools/Remote_Debugging/Debugging_Firefox_Desktop//
https://developer.mozilla.org/en-US/docs/Tools/Tools_Toolbox#Advanced_settingsuser_pref("devtools.debugger.remote-enabled", false);
user_pref("devtools.chrome.enabled", false);
user_pref("devtools.debugger.force-local", true);
// PREF: Disable Mozilla telemetry/experiments
//
https://wiki.mozilla.org/Platform/Features/Telemetry//
https://wiki.mozilla.org/Privacy/Reviews/Telemetry//
https://wiki.mozilla.org/Telemetry//
https://www.mozilla.org/en-US/legal/privacy/firefox.html#telemetry//
https://support.mozilla.org/t5/Firefox-crashes/Mozilla-Crash-Reporter/ta-p/1715//
https://wiki.mozilla.org/Security/Reviews/Firefox6/ReviewNotes/telemetry//
https://gecko.readthedocs.io/en/latest/browser/experiments/experiments/manifest.html//
https://wiki.mozilla.org/Telemetry/Experimentsuser_pref("toolkit.telemetry.enabled", false);
user_pref("toolkit.telemetry.unified", false);
user_pref("experiments.supported", false);
user_pref("experiments.enabled", false);
user_pref("experiments.manifest.uri", "");
// PREF: Disallow Necko to do A/B testing
//
https://trac.torproject.org/projects/tor/ticket/13170user_pref("network.allow-experiments", false);
// PREF: Disable sending Firefox crash reports to Mozilla servers
//
https://wiki.mozilla.org/Breakpad//
http://kb.mozillazine.org/Breakpad//
https://dxr.mozilla.org/mozilla-central/source/toolkit/crashreporter//
https://bugzilla.mozilla.org/show_bug.cgi?id=411490// A list of submitted crash reports can be found at about:crashes
user_pref("breakpad.reportURL", "");
// PREF: Disable sending reports of tab crashes to Mozilla (about:tabcrashed), don't nag user about unsent crash reports
//
https://hg.mozilla.org/mozilla-central/file/tip/browser/app/profile/firefox.jsuser_pref("browser.tabs.crashReporting.sendReport", false);
user_pref("browser.crashReports.unsubmittedCheck.enabled", false);
// PREF: Disable FlyWeb (discovery of LAN/proximity IoT devices that expose a Web interface)
//
https://wiki.mozilla.org/FlyWeb//
https://wiki.mozilla.org/FlyWeb/Security_scenarios//
https://docs.google.com/document/d/1eqLb6cGjDL9XooSYEEo7mE-zKQ-o-AuDTcEyNhfBMBM/edit//
http://www.ghacks.net/2016/07/26/firefox-flywebuser_pref("dom.flyweb.enabled", false);
// PREF: Disable the UITour backend
//
https://trac.torproject.org/projects/tor/ticket/19047#comment:3user_pref("browser.uitour.enabled", false);
// PREF: Enable Firefox Tracking Protection
//
https://wiki.mozilla.org/Security/Tracking_protection//
https://support.mozilla.org/en-US/kb/tracking-protection-firefox//
https://support.mozilla.org/en-US/kb/tracking-protection-pbm//
https://kontaxis.github.io/trackingprotectionfirefox///
https://feeding.cloud.geek.nz/posts/how-tracking-protection-works-in-firefox/user_pref("privacy.trackingprotection.enabled", true);
user_pref("privacy.trackingprotection.pbmode.enabled", true);
// PREF: Enable contextual identity Containers feature (Firefox >= 52)
// NOTICE: Containers are not available in Private Browsing mode
//
https://wiki.mozilla.org/Security/Contextual_Identity_Project/Containersuser_pref("privacy.userContext.enabled", true);
// PREF: Enable hardening against various fingerprinting vectors (Tor Uplift project)
//
https://wiki.mozilla.org/Security/Tor_Uplift/Tracking//
https://bugzilla.mozilla.org/show_bug.cgi?id=1333933user_pref("privacy.resistFingerprinting", true);
// PREF: Disable the built-in PDF viewer
//
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-2743//
https://blog.mozilla.org/security/2015/08/06/firefox-exploit-found-in-the-wild///
https://www.mozilla.org/en-US/security/advisories/mfsa2015-69/user_pref("pdfjs.disabled", true);
// PREF: Disable collection/sending of the health report (healthreport.sqlite*)
//
https://support.mozilla.org/en-US/kb/firefox-health-report-understand-your-browser-perf//
https://gecko.readthedocs.org/en/latest/toolkit/components/telemetry/telemetry/preferences.htmluser_pref("datareporting.healthreport.uploadEnabled", false);
user_pref("datareporting.healthreport.service.enabled", false);
user_pref("datareporting.policy.dataSubmissionEnabled", false);
// PREF: Disable Heartbeat (Mozilla user rating telemetry)
//
https://wiki.mozilla.org/Advocacy/heartbeat//
https://trac.torproject.org/projects/tor/ticket/19047user_pref("browser.selfsupport.url", "");
// PREF: Disable Firefox Hello (disabled) (Firefox < 49)
//
https://wiki.mozilla.org/Loop//
https://support.mozilla.org/t5/Chat-and-share/Support-for-Hello-discontinued-in-Firefox-49/ta-p/37946// NOTICE-DISABLED: Firefox Hello requires setting `media.peerconnection.enabled` and `media.getusermedia.screensharing.enabled` to true, `security.OCSP.require` to false to work.
user_pref("loop.enabled", false);
// PREF: Disable Firefox Hello metrics collection
//
https://groups.google.com/d/topic/mozilla.dev.platform/nyVkCx-_sFw/discussionuser_pref("loop.logDomains", false);
// PREF: Enable Auto Update (disabled)
// NOTICE: Fully automatic updates are disabled and left to package management systems on Linux. Windows users may want to change this setting.
// CIS 2.1.1
//user_pref("app.update.auto", true);
// PREF: Enforce checking for Firefox updates
//
http://kb.mozillazine.org/App.update.enabled// NOTICE: Update check page might incorrectly report Firefox ESR as out-of-date
user_pref("app.update.enabled", true);
// PREF: Enable blocking reported web forgeries
//
https://wiki.mozilla.org/Security/Safe_Browsing//
http://kb.mozillazine.org/Safe_browsing//
https://support.mozilla.org/en-US/kb/how-does-phishing-and-malware-protection-work//
http://forums.mozillazine.org/viewtopic.php?f=39&t=2711237&p=12896849#p12896849// CIS 2.3.4
user_pref("browser.safebrowsing.enabled", false); // Firefox < 50
user_pref("browser.safebrowsing.phishing.enabled", false); // firefox >= 50
// PREF: Enable blocking reported attack sites
//
http://kb.mozillazine.org/Browser.safebrowsing.malware.enabled// CIS 2.3.5
user_pref("browser.safebrowsing.malware.enabled", false);
// More
user_pref("browser.safebrowsing.downloads.enabled", false);
// PREF: Disable querying Google Application Reputation database for downloaded binary files
//
https://www.mozilla.org/en-US/firefox/39.0/releasenotes///
https://wiki.mozilla.org/Security/Application_Reputationuser_pref("browser.safebrowsing.downloads.remote.enabled", false);
// PREF: Disable Pocket
//
https://support.mozilla.org/en-US/kb/save-web-pages-later-pocket-firefox//
https://github.com/pyllyukko/user.js/issues/143user_pref("browser.pocket.enabled", false);
user_pref("extensions.pocket.enabled", false);
// PREF: Disable SHIELD
//
https://support.mozilla.org/en-US/kb/shield//
https://bugzilla.mozilla.org/show_bug.cgi?id=1370801user_pref("extensions.shield-recipe-client.enabled", false);
user_pref("app.shield.optoutstudies.enabled", false);
// PREF: Disable "Recommended by Pocket" in Firefox Quantum
user_pref("browser.newtabpage.activity-stream.feeds.section.topstories", false);
/******************************************************************************
* SECTION: Automatic connections *
******************************************************************************/
// PREF: Disable prefetching of <link rel="next"> URLs
//
http://kb.mozillazine.org/Network.prefetch-next//
https://developer.mozilla.org/en-US/docs/Web/HTTP/Link_prefetching_FAQ#Is_there_a_preference_to_disable_link_prefetching.3Fuser_pref("network.prefetch-next", false);
// PREF: Disable DNS prefetching
//
http://kb.mozillazine.org/Network.dns.disablePrefetch//
https://developer.mozilla.org/en-US/docs/Web/HTTP/Controlling_DNS_prefetchinguser_pref("network.dns.disablePrefetch", true);
user_pref("network.dns.disablePrefetchFromHTTPS", true);
// PREF: Disable the predictive service (Necko)
//
https://wiki.mozilla.org/Privacy/Reviews/Neckouser_pref("network.predictor.enabled", false);
// PREF: Reject .onion hostnames before passing the to DNS
//
https://bugzilla.mozilla.org/show_bug.cgi?id=1228457// RFC 7686
user_pref("network.dns.blockDotOnion", true);
// PREF: Disable search suggestions in the search bar
//
http://kb.mozillazine.org/Browser.search.suggest.enableduser_pref("browser.search.suggest.enabled", false);
// PREF: Disable "Show search suggestions in location bar results"
user_pref("browser.urlbar.suggest.searches", false);
// PREF: When using the location bar, don't suggest URLs from browsing history
user_pref("browser.urlbar.suggest.history", false);
// PREF: Disable SSDP
//
https://bugzilla.mozilla.org/show_bug.cgi?id=1111967user_pref("browser.casting.enabled", false);
// PREF: Disable automatic downloading of OpenH264 codec
//
https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_media-capabilities//
https://andreasgal.com/2014/10/14/openh264-now-in-firefox/user_pref("media.gmp-gmpopenh264.enabled", false);
user_pref("media.gmp-manager.url", "");
// PREF: Disable speculative pre-connections
//
https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_speculative-pre-connections//
https://bugzilla.mozilla.org/show_bug.cgi?id=814169user_pref("network.http.speculative-parallel-limit", 0);
// PREF: Disable downloading homepage snippets/messages from Mozilla
//
https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_mozilla-content//
https://wiki.mozilla.org/Firefox/Projects/Firefox_Start/Snippet_Serviceuser_pref("browser.aboutHomeSnippets.updateUrl", "");
// PREF: Never check updates for search engines
//
https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_auto-update-checkinguser_pref("browser.search.update", false);
// PREF: Disable automatic captive portal detection (Firefox >= 52.0)
//
https://support.mozilla.org/en-US/questions/1157121user_pref("network.captive-portal-service.enabled", false);
/******************************************************************************
* SECTION: HTTP *
******************************************************************************/
// PREF: Disallow NTLMv1
//
https://bugzilla.mozilla.org/show_bug.cgi?id=828183user_pref("network.negotiate-auth.allow-insecure-ntlm-v1", false);
// it is still allowed through HTTPS. uncomment the following to disable it completely.
//user_pref("network.negotiate-auth.allow-insecure-ntlm-v1-https", false);
// PREF: Enable CSP 1.1 script-nonce directive support
//
https://bugzilla.mozilla.org/show_bug.cgi?id=855326user_pref("security.csp.experimentalEnabled", true);
// PREF: Enable Content Security Policy (CSP)
//
https://developer.mozilla.org/en-US/docs/Web/Security/CSP/Introducing_Content_Security_Policy//
https://developer.mozilla.org/en-US/docs/Web/HTTP/CSPuser_pref("security.csp.enable", true);
// PREF: Enable Subresource Integrity
//
https://developer.mozilla.org/en-US/docs/Web/Security/Subresource_Integrity//
https://wiki.mozilla.org/Security/Subresource_Integrityuser_pref("security.sri.enable", true);
// PREF: DNT HTTP header (disabled)
//
https://www.mozilla.org/en-US/firefox/dnt///
https://en.wikipedia.org/wiki/Do_not_track_header//
https://dnt-dashboard.mozilla.org//
https://github.com/pyllyukko/user.js/issues/11// NOTICE: Do No Track must be enabled manually
//user_pref("privacy.donottrackheader.enabled", true);
// PREF: Send a referer header with the target URI as the source
//
https://bugzilla.mozilla.org/show_bug.cgi?id=822869//
https://github.com/pyllyukko/user.js/issues/227// NOTICE: Spoofing referers breaks functionality on websites relying on authentic referer headers
// NOTICE: Spoofing referers breaks visualisation of 3rd-party sites on the Lightbeam addon
// NOTICE: Spoofing referers disables CSRF protection on some login pages not implementing origin-header/cookie+token based CSRF protection
// TODO:
https://github.com/pyllyukko/user.js/issues/94, commented-out XOriginPolicy/XOriginTrimmingPolicy = 2 prefs
user_pref("network.http.referer.spoofSource", true);
// PREF: Don't send referer headers when following links across different domains (disabled)
//
https://github.com/pyllyukko/user.js/issues/227// user_pref("network.http.referer.XOriginPolicy", 2);
// PREF: Accept Only 1st Party Cookies
//
http://kb.mozillazine.org/Network.cookie.cookieBehavior#1// NOTICE: Blocking 3rd-party cookies breaks a number of payment gateways
// CIS 2.5.1
user_pref("network.cookie.cookieBehavior", 1);
// PREF: Make sure that third-party cookies (if enabled) never persist beyond the session.
//
https://feeding.cloud.geek.nz/posts/tweaking-cookies-for-privacy-in-firefox///
http://kb.mozillazine.org/Network.cookie.thirdparty.sessionOnly//
https://developer.mozilla.org/en-US/docs/Cookies_Preferences_in_Mozilla#network.cookie.thirdparty.sessionOnlyuser_pref("network.cookie.thirdparty.sessionOnly", true);
// PREF: Spoof User-agent (disabled)
//user_pref("general.useragent.override", "Mozilla/5.0 (Windows NT 6.1; rv:45.0) Gecko/20100101 Firefox/45.0");
//user_pref("general.appname.override", "Netscape");
//user_pref("general.appversion.override", "5.0 (Windows)");
//user_pref("general.platform.override", "Win32");
//user_pref("general.oscpu.override", "Windows NT 6.1");
/*******************************************************************************
* SECTION: Caching *
******************************************************************************/
// PREF: Permanently enable private browsing mode
//
https://support.mozilla.org/en-US/kb/Private-Browsing//
https://wiki.mozilla.org/PrivateBrowsing// NOTICE: You can not view or inspect cookies when in private browsing:
https://bugzilla.mozilla.org/show_bug.cgi?id=823941// NOTICE: When _javascript_ is enabled, Websites can detect use of Private Browsing mode
// NOTICE: Private browsing breaks Kerberos authentication
// NOTICE: Disables "Containers" functionality (see below)
// NOTICE: "Always use private browsing mode" (browser.privatebrowsing.autostart) disables the possibility to use password manager:
https://support.mozilla.org/en-US/kb/usernames-and-passwords-are-not-saved#w_private-browsinguser_pref("browser.privatebrowsing.autostart", true);
// PREF: Do not download URLs for the offline cache
//
http://kb.mozillazine.org/Browser.cache.offline.enableuser_pref("browser.cache.offline.enable", false);
// PREF: Do not enable offline cache
user_pref("browser.cache.offline.capacity", 0);
// PREF: Clear history when Firefox closes
//
https://support.mozilla.org/en-US/kb/Clear%20Recent%20History#w_how-do-i-make-firefox-clear-my-history-automatically// NOTICE: Installing user.js will remove your browsing history, caches and local storage.
// NOTICE: Installing user.js **will remove your saved passwords** (
https://github.com/pyllyukko/user.js/issues/27)
// NOTICE: Clearing open windows on Firefox exit causes 2 windows to open when Firefox starts
https://bugzilla.mozilla.org/show_bug.cgi?id=1334945user_pref("privacy.sanitize.sanitizeOnShutdown", true);
user_pref("privacy.clearOnShutdown.cache", true);
user_pref("privacy.clearOnShutdown.cookies", true);
user_pref("privacy.clearOnShutdown.downloads", true);
user_pref("privacy.clearOnShutdown.formdata", true);
user_pref("privacy.clearOnShutdown.history", true);
user_pref("privacy.clearOnShutdown.offlineApps", true);
user_pref("privacy.clearOnShutdown.sessions", true);
user_pref("privacy.clearOnShutdown.openWindows", true);
// PREF: Set time range to "Everything" as default in "Clear Recent History"
user_pref("privacy.sanitize.timeSpan", 0);
// PREF: Clear everything but "Site Preferences" in "Clear Recent History"
user_pref("privacy.cpd.offlineApps", true);
user_pref("privacy.cpd.cache", true);
user_pref("privacy.cpd.cookies", true);
user_pref("privacy.cpd.downloads", true);
user_pref("privacy.cpd.formdata", true);
user_pref("privacy.cpd.history", true);
user_pref("privacy.cpd.sessions", true);
// PREF: Don't remember browsing history
user_pref("places.history.enabled", false);
// PREF: Disable disk cache
//
http://kb.mozillazine.org/Browser.cache.disk.enableuser_pref("browser.cache.disk.enable", false);
// PREF: Disable memory cache (disabled)
//
http://kb.mozillazine.org/Browser.cache.memory.enableuser_pref("browser.cache.memory.enable", false);
// PREF: Disable Caching of SSL Pages
// CIS Version 1.2.0 October 21st, 2011 2.5.8
//
http://kb.mozillazine.org/Browser.cache.disk_cache_ssluser_pref("browser.cache.disk_cache_ssl", false);
// PREF: Disable download history
// CIS Version 1.2.0 October 21st, 2011 2.5.5
user_pref("browser.download.manager.retention", 0);
// PREF: Disable password manager
// CIS Version 1.2.0 October 21st, 2011 2.5.2
user_pref("signon.rememberSignons", false);
// PREF: Disable form autofill, don't save information entered in web page forms and the Search Bar
user_pref("browser.formfill.enable", false);
// PREF: Cookies expires at the end of the session (when the browser closes)
//
http://kb.mozillazine.org/Network.cookie.lifetimePolicy#2user_pref("network.cookie.lifetimePolicy", 2);
// PREF: Require manual intervention to autofill known username/passwords sign-in forms
//
http://kb.mozillazine.org/Signon.autofillForms//
https://www.torproject.org/projects/torbrowser/design/#identifier-linkabilityuser_pref("signon.autofillForms", false);
// PREF: Disable formless login capture
//
https://bugzilla.mozilla.org/show_bug.cgi?id=1166947user_pref("signon.formlessCapture.enabled", false);
// PREF: When username/password autofill is enabled, still disable it on non-HTTPS sites
//
https://hg.mozilla.org/integration/mozilla-inbound/rev/f0d146fe7317user_pref("signon.autofillForms.http", false);
// PREF: Show in-content login form warning UI for insecure login fields
//
https://hg.mozilla.org/integration/mozilla-inbound/rev/f0d146fe7317user_pref("security.insecure_field_warning.contextual.enabled", true);
// PREF: Disable the password manager for pages with autocomplete=off (disabled)
//
https://bugzilla.mozilla.org/show_bug.cgi?id=956906// OWASP ASVS V9.1
// Does not prevent any kind of auto-completion (see browser.formfill.enable, signon.autofillForms)
//user_pref("signon.storeWhenAutocompleteOff", false);
// PREF: Delete Search and Form History
// CIS Version 1.2.0 October 21st, 2011 2.5.6
user_pref("browser.formfill.expire_days", 0);
// PREF: Clear SSL Form Session Data
//
http://kb.mozillazine.org/Browser.sessionstore.privacy_level#2// Store extra session data for unencrypted (non-HTTPS) sites only.
// CIS Version 1.2.0 October 21st, 2011 2.5.7
// NOTE: CIS says 1, we use 2
user_pref("browser.sessionstore.privacy_level", 2);
// PREF: Delete temporary files on exit
//
https://bugzilla.mozilla.org/show_bug.cgi?id=238789user_pref("browser.helperApps.deleteTempFileOnExit", true);
// PREF: Do not create screenshots of visited pages (relates to the "new tab page" feature)
//
https://support.mozilla.org/en-US/questions/973320//
https://developer.mozilla.org/en-US/docs/Mozilla/Preferences/Preference_reference/browser.pagethumbnails.capturing_disableduser_pref("browser.pagethumbnails.capturing_disabled", true);
// PREF: Don't fetch and permanently store favicons for Windows .URL shortcuts created by drag and drop
// NOTICE: .URL shortcut files will be created with a generic icon
// Favicons are stored as .ico files in $profile_dir\shortcutCache
user_pref("browser.shell.shortcutFavicons", false);
// PREF: Disable bookmarks backups (default: 15)
//
http://kb.mozillazine.org/Browser.bookmarks.max_backupsuser_pref("browser.bookmarks.max_backups", 0);
/*******************************************************************************
* SECTION: UI related *
*******************************************************************************/
// PREF: Enable insecure password warnings (login forms in non-HTTPS pages)
//
https://blog.mozilla.org/tanvi/2016/01/28/no-more-passwords-over-http-please///
https://bugzilla.mozilla.org/show_bug.cgi?id=1319119//
https://bugzilla.mozilla.org/show_bug.cgi?id=1217156user_pref("security.insecure_password.ui.enabled", true);
// PREF: Disable right-click menu manipulation via _javascript_ (disabled)
//user_pref("dom.event.contextmenu.enabled", false);
// PREF: Disable "Are you sure you want to leave this page?" popups on page close
//
https://support.mozilla.org/en-US/questions/1043508// Does not prevent JS leaks of the page close event.
//
https://developer.mozilla.org/en-US/docs/Web/Events/beforeunload//user_pref("dom.disable_beforeunload", true);
// PREF: Disable Downloading on Desktop
// CIS 2.3.2
user_pref("browser.download.folderList", 2);
// PREF: Always ask the user where to download
//
https://developer.mozilla.org/en/Download_Manager_preferences (obsolete)
user_pref("browser.download.useDownloadDir", false);
// PREF: Disable the "new tab page" feature and show a blank tab instead
//
https://wiki.mozilla.org/Privacy/Reviews/New_Tab//
https://support.mozilla.org/en-US/kb/new-tab-page-show-hide-and-customize-top-sites#w_how-do-i-turn-the-new-tab-page-offuser_pref("browser.newtabpage.enabled", false);
user_pref("browser.newtab.url", "about:blank");
// PREF: Disable Activity Stream
//
https://wiki.mozilla.org/Firefox/Activity_Streamuser_pref("browser.newtabpage.activity-stream.enabled", false);
// PREF: Disable new tab tile ads & preload
//
http://www.thewindowsclub.com/disable-remove-ad-tiles-from-firefox//
http://forums.mozillazine.org/viewtopic.php?p=13876331#p13876331//
https://wiki.mozilla.org/Tiles/Technical_Documentation#Ping//
https://gecko.readthedocs.org/en/latest/browser/browser/DirectoryLinksProvider.html#browser-newtabpage-directory-source//
https://gecko.readthedocs.org/en/latest/browser/browser/DirectoryLinksProvider.html#browser-newtabpage-directory-ping// TODO: deprecated? not in DXR, some dead links
user_pref("browser.newtabpage.enhanced", false);
user_pref("browser.newtab.preload", false);
user_pref("browser.newtabpage.directory.ping", "");
user_pref("browser.newtabpage.directory.source", "data:text/plain,{}");
// PREF: Enable Auto Notification of Outdated Plugins (Firefox < 50)
//
https://wiki.mozilla.org/Firefox3.6/Plugin_Update_Awareness_Security_Review// CIS Version 1.2.0 October 21st, 2011 2.1.2
//
https://hg.mozilla.org/mozilla-central/rev/304560user_pref("plugins.update.notifyUser", true);
// PREF: Force Punycode for Internationalized Domain Names
//
http://kb.mozillazine.org/Network.IDN_show_punycode//
https://www.xudongz.com/blog/2017/idn-phishing///
https://wiki.mozilla.org/IDN_Display_Algorithm//
https://en.wikipedia.org/wiki/IDN_homograph_attack//
https://www.mozilla.org/en-US/security/advisories/mfsa2017-02/// CIS Mozilla Firefox 24 ESR v1.0.0 - 3.6
user_pref("network.IDN_show_punycode", true);
// PREF: Disable inline autocomplete in URL bar
//
http://kb.mozillazine.org/Inline_autocompleteuser_pref("browser.urlbar.autoFill", false);
user_pref("browser.urlbar.autoFill.typed", false);
// PREF: Disable CSS :visited selectors
//
https://blog.mozilla.org/security/2010/03/31/plugging-the-css-history-leak///
https://dbaron.org/mozilla/visited-privacyuser_pref("layout.css.visited_links_enabled", false);
// PREF: Disable URL bar autocomplete and history/bookmarks suggestions dropdown
//
http://kb.mozillazine.org/Disabling_autocomplete_-_Firefox#Firefox_3.5user_pref("browser.urlbar.autocomplete.enabled", false);
// PREF: Do not check if Firefox is the default browser
user_pref("browser.shell.checkDefaultBrowser", false);
// PREF: When password manager is enabled, lock the password storage periodically
// CIS Version 1.2.0 October 21st, 2011 2.5.3 Disable Prompting for Credential Storage
user_pref("security.ask_for_password", 2);
// PREF: Lock the password storage every 1 minutes (default: 30)
user_pref("security.password_lifetime", 1);
// PREF: Display a notification bar when websites offer data for offline use
//
http://kb.mozillazine.org/Browser.offline-apps.notifyuser_pref("browser.offline-apps.notify", true);
/******************************************************************************
* SECTION: Cryptography *
******************************************************************************/
// PREF: Enable HSTS preload list (pre-set HSTS sites list provided by Mozilla)
//
https://blog.mozilla.org/security/2012/11/01/preloading-hsts///
https://wiki.mozilla.org/Privacy/Features/HSTS_Preload_List//
https://en.wikipedia.org/wiki/HTTP_Strict_Transport_Securityuser_pref("network.stricttransportsecurity.preloadlist", true);
// PREF: Enable Online Certificate Status Protocol
//
https://en.wikipedia.org/wiki/Online_Certificate_Status_Protocol//
https://www.imperialviolet.org/2014/04/19/revchecking.html//
https://www.maikel.pro/blog/current-state-certificate-revocation-crls-ocsp///
https://wiki.mozilla.org/CA:RevocationPlan//
https://wiki.mozilla.org/CA:ImprovingRevocation//
https://wiki.mozilla.org/CA:OCSP-HardFail//
https://news.netcraft.com/archives/2014/04/24/certificate-revocation-why-browsers-remain-affected-by-heartbleed.html//
https://news.netcraft.com/archives/2013/04/16/certificate-revocation-and-the-performance-of-ocsp.html// NOTICE: OCSP leaks your IP and domains you visit to the CA when OCSP Stapling is not available on visited host
// NOTICE: OCSP is vulnerable to replay attacks when nonce is not configured on the OCSP responder
// NOTICE: OCSP adds latency (performance)
// NOTICE: Short-lived certificates are not checked for revocation (security.pki.cert_short_lifetime_in_days, default:10)
// CIS Version 1.2.0 October 21st, 2011 2.2.4
user_pref("security.OCSP.enabled", 1);
// PREF: Enable OCSP Stapling support
//
https://en.wikipedia.org/wiki/OCSP_stapling//
https://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox///
https://www.digitalocean.com/community/tutorials/how-to-configure-ocsp-stapling-on-apache-and-nginxuser_pref("security.ssl.enable_ocsp_stapling", true);
// PREF: Enable OCSP Must-Staple support (Firefox >= 45)
//
https://blog.mozilla.org/security/2015/11/23/improving-revocation-ocsp-must-staple-and-short-lived-certificates///
https://www.entrust.com/ocsp-must-staple///
https://github.com/schomery/privacy-settings/issues/40// NOTICE: Firefox falls back on plain OCSP when must-staple is not configured on the host certificate
user_pref("security.ssl.enable_ocsp_must_staple", true);
// PREF: Require a valid OCSP response for OCSP enabled certificates
//
https://groups.google.com/forum/#!topic/mozilla.dev.security/n1G-N2-HTVA// Disabling this will make OCSP bypassable by MitM attacks suppressing OCSP responses
// NOTICE: `security.OCSP.require` will make the connection fail when the OCSP responder is unavailable
// NOTICE: `security.OCSP.require` is known to break browsing on some [captive portals](
https://en.wikipedia.org/wiki/Captive_portal)
user_pref("security.OCSP.require", false);
// PREF: Disable TLS Session Tickets
//
https://www.blackhat.com/us-13/briefings.html#NextGen//
https://media.blackhat.com/us-13/US-13-Daigniere-TLS-Secrets-Slides.pdf//
https://media.blackhat.com/us-13/US-13-Daigniere-TLS-Secrets-WP.pdf//
https://bugzilla.mozilla.org/show_bug.cgi?id=917049//
https://bugzilla.mozilla.org/show_bug.cgi?id=967977user_pref("security.ssl.disable_session_identifiers", true);
// PREF: Only allow TLS 1.[0-3]
//
http://kb.mozillazine.org/Security.tls.version.*// 1 = TLS 1.0 is the minimum required / maximum supported encryption protocol. (This is the current default for the maximum supported version.)
// 2 = TLS 1.1 is the minimum required / maximum supported encryption protocol.
user_pref("security.tls.version.min", 1);
user_pref("security.tls.version.max", 4);
// PREF: Disable insecure TLS version fallback
//
https://bugzilla.mozilla.org/show_bug.cgi?id=1084025//
https://github.com/pyllyukko/user.js/pull/206#issuecomment-280229645user_pref("security.tls.version.fallback-limit", 3);
// PREF: Enfore Public Key Pinning
//
https://en.wikipedia.org/wiki/HTTP_Public_Key_Pinning//
https://wiki.mozilla.org/SecurityEngineering/Public_Key_Pinning// "2. Strict. Pinning is always enforced."
user_pref("security.cert_pinning.enforcement_level", 2);
// PREF: Disallow SHA-1
//
https://bugzilla.mozilla.org/show_bug.cgi?id=1302140//
https://shattered.io/user_pref("security.pki.sha1_enforcement_level", 1);
// PREF: Warn the user when server doesn't support RFC 5746 ("safe" renegotiation)
//
https://wiki.mozilla.org/Security:Renegotiation#security.ssl.treat_unsafe_negotiation_as_broken//
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2009-3555user_pref("security.ssl.treat_unsafe_negotiation_as_broken", false);
// PREF: Disallow connection to servers not supporting safe renegotiation (disabled)
//
https://wiki.mozilla.org/Security:Renegotiation#security.ssl.require_safe_negotiation//
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2009-3555// TODO: `security.ssl.require_safe_negotiation` is more secure but makes browsing next to impossible (2012-2014-... - `ssl_error_unsafe_negotiation` errors), so is left disabled
user_pref("security.ssl.require_safe_negotiation", false);
// PREF: Disable automatic reporting of TLS connection errors
//
https://support.mozilla.org/en-US/kb/certificate-pinning-reports// we could also disable security.ssl.errorReporting.enabled, but I think it's
// good to leave the option to report potentially malicious sites if the user
// chooses to do so.
// you can test this at
https://pinningtest.appspot.com/user_pref("security.ssl.errorReporting.automatic", false);
// PREF: Pre-populate the current URL but do not pre-fetch the certificate in the "Add Security Exception" dialog
//
http://kb.mozillazine.org/Browser.ssl_override_behavior//
https://github.com/pyllyukko/user.js/issues/210user_pref("browser.ssl_override_behavior", 1);
/******************************************************************************
* SECTION: Cipher suites *
******************************************************************************/
// PREF: Disable null ciphers
user_pref("security.ssl3.rsa_null_sha", false);
user_pref("security.ssl3.rsa_null_md5", false);
user_pref("security.ssl3.ecdhe_rsa_null_sha", false);
user_pref("security.ssl3.ecdhe_ecdsa_null_sha", false);
user_pref("security.ssl3.ecdh_rsa_null_sha", false);
user_pref("security.ssl3.ecdh_ecdsa_null_sha", false);
// PREF: Disable SEED cipher
//
https://en.wikipedia.org/wiki/SEEDuser_pref("security.ssl3.rsa_seed_sha", false);
// PREF: Disable 40/56/128-bit ciphers
// 40-bit ciphers
user_pref("security.ssl3.rsa_rc4_40_md5", false);
user_pref("security.ssl3.rsa_rc2_40_md5", false);
// 56-bit ciphers
user_pref("security.ssl3.rsa_1024_rc4_56_sha", false);
// 128-bit ciphers
user_pref("security.ssl3.rsa_camellia_128_sha", false);
user_pref("security.ssl3.ecdhe_rsa_aes_128_sha", false);
user_pref("security.ssl3.ecdhe_ecdsa_aes_128_sha", false);
user_pref("security.ssl3.ecdh_rsa_aes_128_sha", false);
user_pref("security.ssl3.ecdh_ecdsa_aes_128_sha", false);
user_pref("security.ssl3.dhe_rsa_camellia_128_sha", false);
user_pref("security.ssl3.dhe_rsa_aes_128_sha", false);
// PREF: Disable RC4
//
https://developer.mozilla.org/en-US/Firefox/Releases/38#Security//
https://bugzilla.mozilla.org/show_bug.cgi?id=1138882//
https://rc4.io///
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-2566user_pref("security.ssl3.ecdh_ecdsa_rc4_128_sha", false);
user_pref("security.ssl3.ecdh_rsa_rc4_128_sha", false);
user_pref("security.ssl3.ecdhe_ecdsa_rc4_128_sha", false);
user_pref("security.ssl3.ecdhe_rsa_rc4_128_sha", false);
user_pref("security.ssl3.rsa_rc4_128_md5", false);
user_pref("security.ssl3.rsa_rc4_128_sha", false);
user_pref("security.tls.unrestricted_rc4_fallback", false);
// PREF: Disable 3DES (effective key size is < 128)
//
https://en.wikipedia.org/wiki/3des#Security//
http://en.citizendium.org/wiki/Meet-in-the-middle_attack//
http://www-archive.mozilla.org/projects/security/pki/nss/ssl/fips-ssl-ciphersuites.htmluser_pref("security.ssl3.dhe_dss_des_ede3_sha", false);
user_pref("security.ssl3.dhe_rsa_des_ede3_sha", false);
user_pref("security.ssl3.ecdh_ecdsa_des_ede3_sha", false);
user_pref("security.ssl3.ecdh_rsa_des_ede3_sha", false);
user_pref("security.ssl3.ecdhe_ecdsa_des_ede3_sha", false);
user_pref("security.ssl3.ecdhe_rsa_des_ede3_sha", false);
user_pref("security.ssl3.rsa_des_ede3_sha", false);
user_pref("security.ssl3.rsa_fips_des_ede3_sha", false);
// PREF: Disable ciphers with ECDH (non-ephemeral)
user_pref("security.ssl3.ecdh_rsa_aes_256_sha", false);
user_pref("security.ssl3.ecdh_ecdsa_aes_256_sha", false);
// PREF: Disable 256 bits ciphers without PFS
user_pref("security.ssl3.rsa_camellia_256_sha", false);
// PREF: Enable ciphers with ECDHE and key size > 128bits
user_pref("security.ssl3.ecdhe_rsa_aes_256_sha", true); // 0xc014
user_pref("security.ssl3.ecdhe_ecdsa_aes_256_sha", true); // 0xc00a
// PREF: Enable GCM ciphers (TLSv1.2 only)
//
https://en.wikipedia.org/wiki/Galois/Counter_Modeuser_pref("security.ssl3.ecdhe_ecdsa_aes_128_gcm_sha256", true); // 0xc02b
user_pref("security.ssl3.ecdhe_rsa_aes_128_gcm_sha256", true); // 0xc02f
// PREF: Enable ChaCha20 and Poly1305 (Firefox >= 47)
//
https://www.mozilla.org/en-US/firefox/47.0/releasenotes///
https://tools.ietf.org/html/rfc7905//
https://bugzilla.mozilla.org/show_bug.cgi?id=917571//
https://bugzilla.mozilla.org/show_bug.cgi?id=1247860//
https://cr.yp.to/chacha.htmluser_pref("security.ssl3.ecdhe_ecdsa_chacha20_poly1305_sha256", true);
user_pref("security.ssl3.ecdhe_rsa_chacha20_poly1305_sha256", true);
// PREF: Disable ciphers susceptible to the logjam attack
//
https://weakdh.org/user_pref("security.ssl3.dhe_rsa_camellia_256_sha", false);
user_pref("security.ssl3.dhe_rsa_aes_256_sha", false);
// PREF: Disable ciphers with DSA (max 1024 bits)
user_pref("security.ssl3.dhe_dss_aes_128_sha", false);
user_pref("security.ssl3.dhe_dss_aes_256_sha", false);
user_pref("security.ssl3.dhe_dss_camellia_128_sha", false);
user_pref("security.ssl3.dhe_dss_camellia_256_sha", false);
// PREF: Fallbacks due compatibility reasons
user_pref("security.ssl3.rsa_aes_256_sha", true); // 0x35
user_pref("security.ssl3.rsa_aes_128_sha", true); // 0x2f
// More
user_pref("network.dns.disableIPv6", true);
user_pref("media.eme.enabled", false);
user_pref("media.gmp-eme-adobe.enabled", false);
user_pref("security.tls.insecure_fallback_hosts.use_static_list", false);