58 KiB
58 KiB
// Simply copied from https://github.com/pyllyukko/user.js
/*
The MIT License (MIT)
Copyright (c) 2016 pyllyukko
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
//
/******************************************************************************
* 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, upload on https://www.virustotal.com/, and probably others
user_pref("dom.workers.enabled", false);
// PREF: Disable web notifications
// https://support.mozilla.org/en-US/questions/1140439
user_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/#privacy
user_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-security
user_pref("dom.enable_user_timing", false);
// PREF: Disable Web Audio API
// https://bugzilla.mozilla.org/show_bug.cgi?id=1288359
user_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=689252
user_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/TCPSocket
user_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=960426
user_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-defenses
user_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-WebRTC
user_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/Navigator
user_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=1313580
user_pref("dom.battery.enabled", false);
// PREF: Disable telephony API
// https://wiki.mozilla.org/WebAPI/Security/WebTelephony
user_pref("dom.telephony.enabled", false);
// PREF: Disable "beacon" asynchronous HTTP transfers (used for analytics)
// https://developer.mozilla.org/en-US/docs/Web/API/navigator.sendBeacon
user_pref("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.enabled
user_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/2f9f8ea4b9c3
user_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_API
user_pref("media.webspeech.recognition.enable", false);
// PREF: Disable speech synthesis
// https://developer.mozilla.org/en-US/docs/Web/API/SpeechSynthesis
user_pref("media.webspeech.synth.enabled", false);
// PREF: Disable sensor API
// https://wiki.mozilla.org/Sensor_API
user_pref("device.sensors.enabled", false);
// PREF: Disable pinging URIs specified in HTML ping= attributes
// http://kb.mozillazine.org/Browser.send_pings
user_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_host
user_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/13023
user_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_API
user_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-security
user_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=1342361
user_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_testing
user_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/18603
user_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_info
user_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=1360039
user_pref("dom.maxHardwareConcurrency", 2);
/******************************************************************************
* SECTION: Misc *
******************************************************************************/
// PREF: Disable face detection
user_pref("camera.control.face_detection.enabled", false);
// 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-engine
user_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-Language
user_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.matchOS
user_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.autocopy
user_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/52d635f2b33d
user_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.enabled
user_pref("keyword.enabled", false);
// PREF: Don't trim HTTP off of URLs in the address bar.
// https://bugzilla.mozilla.org/show_bug.cgi?id=665580
user_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.html
user_pref("browser.fixup.alternate.enabled", false);
// PREF: When browser.fixup.alternate.enabled is enabled, strip password from 'user:password@...' URLs
// https://github.com/pyllyukko/user.js/issues/290#issuecomment-303560851
user_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/WebBrowsers
user_pref("network.proxy.socks_remote_dns", true);
// PREF: Don't monitor OS online/offline connection state
// https://trac.torproject.org/projects/tor/ticket/18945
user_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=153889
user_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-2015-2712
user_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%20Bundle
user_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#16
user_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-148922065
user_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=583181
user_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/120
user_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/144287
user_pref("lightweightThemes.update.enabled", false);
// PREF: Disable Flash Player NPAPI plugin
// http://kb.mozillazine.org/Flash_plugin
user_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-blocklist
user_pref("browser.safebrowsing.blockedURIs.enabled", true);
// PREF: Disable Shumway (Mozilla Flash renderer)
// https://developer.mozilla.org/en-US/docs/Mozilla/Projects/Shumway
user_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/16931
user_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/WebIDE
user_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_settings
user_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/Experiments
user_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/13170
user_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.js
user_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-flyweb
user_pref("dom.flyweb.enabled", false);
// PREF: Disable the UITour backend
// https://trac.torproject.org/projects/tor/ticket/19047#comment:3
user_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/Containers
user_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=1333933
user_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.html
user_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/19047
user_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/discussion
user_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", true); // Firefox < 50
user_pref("browser.safebrowsing.phishing.enabled", true); // 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", true);
// 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_Reputation
user_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/143
user_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=1370801
user_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: Limit the connection keep-alive timeout to 15 seconds (disabled)
// https://github.com/pyllyukko/user.js/issues/387
// http://kb.mozillazine.org/Network.http.keep-alive.timeout
// https://httpd.apache.org/docs/current/mod/core.html#keepalivetimeout
//user_pref("network.http.keep-alive.timeout", 15);
// PREF: Disable prefetching of 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.3F
user_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_prefetching
user_pref("network.dns.disablePrefetch", true);
user_pref("network.dns.disablePrefetchFromHTTPS", true);
// PREF: Disable the predictive service (Necko)
// https://wiki.mozilla.org/Privacy/Reviews/Necko
user_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.enabled
user_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=1111967
user_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=814169
user_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_Service
user_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-checking
user_pref("browser.search.update", false);
// PREF: Disable automatic captive portal detection (Firefox >= 52.0)
// https://support.mozilla.org/en-US/questions/1157121
user_pref("network.captive-portal-service.enabled", false);
/******************************************************************************
* SECTION: HTTP *
******************************************************************************/
// PREF: Disallow NTLMv1
// https://bugzilla.mozilla.org/show_bug.cgi?id=828183
user_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=855326
user_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/CSP
user_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_Integrity
user_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: Enable first-party isolation
// https://bugzilla.mozilla.org/show_bug.cgi?id=1299996
// https://bugzilla.mozilla.org/show_bug.cgi?id=1260931
// https://wiki.mozilla.org/Security/FirstPartyIsolation
user_pref("privacy.firstparty.isolate", true);
// 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.sessionOnly
user_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-browsing
user_pref("browser.privatebrowsing.autostart", true);
// PREF: Do not download URLs for the offline cache
// http://kb.mozillazine.org/Browser.cache.offline.enable
user_pref("browser.cache.offline.enable", false);
// 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=1334945
user_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.enable
user_pref("browser.cache.disk.enable", false);
// PREF: Disable memory cache (disabled)
// http://kb.mozillazine.org/Browser.cache.memory.enable
//user_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_ssl
user_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#2
user_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-linkability
user_pref("signon.autofillForms", false);
// PREF: Disable formless login capture
// https://bugzilla.mozilla.org/show_bug.cgi?id=1166947
user_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/f0d146fe7317
user_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/f0d146fe7317
user_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=238789
user_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_disabled
user_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_backups
user_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=1217156
user_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-off
user_pref("browser.newtabpage.enabled", false);
user_pref("browser.newtab.url", "about:blank");
// PREF: Disable Activity Stream
// https://wiki.mozilla.org/Firefox/Activity_Stream
user_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/304560
user_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_autocomplete
user_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-privacy
user_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_3.5
user_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.notify
user_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_Security
user_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-nginx
user_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", true);
// 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=967977
user_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-280229645
user_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-2009-3555
user_pref("security.ssl.treat_unsafe_negotiation_as_broken", true);
// 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", true);
// 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/210
user_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/SEED
user_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-2013-2566
user_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.html
user_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_Mode
user_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.html
user_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