--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/.mozilla/firefox/profile/user.js Sun Mar 17 13:25:15 2019 +0800
+* date: 08 September 2018
+* version 62-beta: Total Eclipse of the Pants
+* "Once upon a time there was light in my life, but now there's only pants in the dark"
+* authors: v52+ github | v51- www.ghacks.net
+* url: https://github.com/ghacksuserjs/ghacks-user.js
+* license: MIT: https://github.com/ghacksuserjs/ghacks-user.js/blob/master/LICENSE.txt
+* releases: These are end-of-stable-life-cycle legacy archives.
+ *Always* use the master branch user.js for a current up-to-date version.
+ url: https://github.com/ghacksuserjs/ghacks-user.js/releases
+ 1. READ the full README
+ * https://github.com/ghacksuserjs/ghacks-user.js/blob/master/README.md
+ * https://github.com/ghacksuserjs/ghacks-user.js/wiki/1.3-Implementation
+ 3. If you skipped steps 1 and 2 above (shame on you), then here is the absolute minimum
+ * Auto-installing updates for Firefox and extensions are disabled (section 0302's)
+ * Some user data is erased on close (section 2800). Change this to suit your needs
+ - 4600s: reset prefs made redundant due to privacy.resistFingerprinting (RPF)
+ or enable them as an alternative to RFP or for ESR users
+ - 9999s: reset deprecated prefs in about:config or enable relevant section(s) for ESR
+ * Site breakage WILL happen
+ - There are often trade-offs and conflicts between Security vs Privacy vs Anti-Fingerprinting
+ and these need to be balanced against Functionality & Convenience & Breakage
+ * You will need to make a few changes to suit your own needs
+ - Search this file for the "[SETUP]" tag to find SOME common items you could check
+ before using to avoid unexpected surprises
+ - Search this file for the "[WARNING]" tag to troubleshoot or prevent SOME common issues
+ 4. BACKUP your profile folder before implementing (and/or test in a new/cloned profile)
+ 5. KEEP UP TO DATE: https://github.com/ghacksuserjs/ghacks-user.js/wiki#small_orange_diamond-maintenance
+/* START: internal custom pref to test for syntax errors
+ * [NOTE] In FF60+, not all syntax errors cause parsing to abort i.e. reaching the last debug
+ * pref no longer necessarily means that all prefs have been applied. Check the console right
+ * after startup for any warnings/error messages related to non-applied prefs
+ * [1] https://blog.mozilla.org/nnethercote/2018/03/09/a-new-preferences-parser-for-firefox/ ***/
+user_pref("_user.js.parrot", "START: Oh yes, the Norwegian Blue... what's wrong with it?");
+/* 0000: disable about:config warning ***/
+user_pref("general.warnOnAboutConfig", false);
+/* 0001: start Firefox in PB (Private Browsing) mode
+ * [SETTING] Privacy & Security>History>Custom Settings>Always use private browsing mode
+ * [NOTE] In this mode *all* windows are "private windows" and the PB mode icon is not displayed
+ * [NOTE] The P in PB mode is misleading: it means no "persistent" local storage of history,
+ * caches, searches or cookies (which you can achieve in normal mode). In fact, it limits or
+ * removes the ability to control these, and you need to quit Firefox to clear them. PB is best
+ * used as a one off window (File>New Private Window) to provide a temporary self-contained
+ * new instance. Closing all Private Windows clears all traces. Repeat as required.
+ * [WARNING] PB does not allow indexedDB which breaks many Extensions that use it
+ * including uBlock Origin, uMatrix, Violentmonkey and Stylus
+ * [1] https://wiki.mozilla.org/Private_Browsing ***/
+ // user_pref("browser.privatebrowsing.autostart", true);
+user_pref("_user.js.parrot", "0100 syntax error: the parrot's dead!");
+/* 0101: disable default browser check
+ * [SETTING] General>Startup>Always check if Firefox is your default browser ***/
+user_pref("browser.shell.checkDefaultBrowser", false);
+/* 0102: set START page (0=blank, 1=home, 2=last visited page, 3=resume previous session)
+ * [SETTING] General>Startup>When Firefox starts ***/
+user_pref("browser.startup.page", 3);
+/* 0103: set HOME+NEWWINDOW page
+ * about:home=Activity Stream (default, see 0514), custom URL, about:blank
+ * [SETTING] Home>New Windows and Tabs>Homepage and new windows ***/
+//;user_pref("browser.startup.homepage", "about:blank");
+/* 0104: set NEWTAB page
+ * true=Activity Stream (default, see 0514), false=blank page
+ * [SETTING] Home>New Windows and Tabs>New tabs ***/
+user_pref("browser.newtabpage.enabled", false);
+user_pref("browser.newtab.preload", false);
+/*** 0200: GEOLOCATION ***/
+user_pref("_user.js.parrot", "0200 syntax error: the parrot's definitely deceased!");
+/* 0201: disable Location-Aware Browsing
+ * [1] https://www.mozilla.org/firefox/geolocation/ ***/
+ // user_pref("geo.enabled", false);
+/* 0201b: set a default permission for Location (FF58+)
+ * [SETTING] to add site exceptions: Page Info>Permissions>Access Your Location
+ * [SETTING] to manage site exceptions: Options>Privacy & Security>Permissions>Location>Settings ***/
+user_pref("permissions.default.geo", 2); // 0=always ask (default), 1=allow, 2=block
+/* 0202: disable GeoIP-based search results
+ * [NOTE] May not be hidden if Firefox has changed your settings due to your locale
+ * [1] https://trac.torproject.org/projects/tor/ticket/16254
+ * [2] https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_geolocation-for-default-search-engine ***/
+user_pref("browser.search.countryCode", "RU"); // (hidden pref)
+user_pref("browser.search.region", "RU"); // (hidden pref)
+user_pref("browser.search.geoip.url", "");
+/* 0205: set OS & APP locale (FF59+)
+ * If set to empty, the OS locales are used. If not set at all, default locale is used ***/
+//;user_pref("intl.locale.requested", "en-US"); // (hidden pref)
+/* 0206: disable geographically specific results/search engines e.g. "browser.search.*.US"
+ * i.e. ignore all of Mozilla's various search engines in multiple locales ***/
+user_pref("browser.search.geoSpecificDefaults", false);
+user_pref("browser.search.geoSpecificDefaults.url", "");
+/* 0207: set language to match ***/
+//;user_pref("intl.accept_languages", "en-US, en");
+/* 0208: enforce US English locale regardless of the system locale
+ * [1] https://bugzilla.mozilla.org/867501 ***/
+//;user_pref("javascript.use_us_english_locale", true); // (hidden pref)
+/* 0209: use APP locale over OS locale in regional preferences (FF56+)
+ * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1379420,1364789 ***/
+//;user_pref("intl.regional_prefs.use_os_locales", false);
+/* 0210: use Mozilla geolocation service instead of Google when geolocation is enabled
+ * Optionally enable logging to the console (defaults to false) ***/
+user_pref("geo.wifi.uri", "https://location.services.mozilla.com/v1/geolocate?key=%MOZILLA_API_KEY%");
+ // user_pref("geo.wifi.logging.enabled", true); // (hidden pref)
+ We choose to not disable auto-CHECKs (0301's) but to disable auto-INSTALLs (0302's).
+ There are many legitimate reasons to turn off auto-INSTALLS, including hijacked or
+ monetized extensions, time constraints, legacy issues, and fear of breakage/bugs.
+ It is still important to do updates for security reasons, please do so manually. ***/
+user_pref("_user.js.parrot", "0300 syntax error: the parrot's not pinin' for the fjords!");
+/* 0301a: disable auto-update checks for Firefox
+ * [NOTE] Firefox currently checks every 12 hrs and allows 8 day notification dismissal
+ * [SETTING] General>Firefox Updates>Never check for updates ***/
+ // user_pref("app.update.enabled", false);
+/* 0301b: disable auto-update checks for extensions
+ * [SETTING] about:addons>Extensions>[cog-wheel-icon]>Update Add-ons Automatically (toggle) ***/
+ // user_pref("extensions.update.enabled", false);
+/* 0302a: disable auto update installing for Firefox (after the check in 0301a)
+ * [SETTING] General>Firefox Updates>Check for updates but let you choose...
+ * [NOTE] The UI checkbox also controls the behavior for checking, the pref only controls auto installing ***/
+user_pref("app.update.auto", false);
+/* 0302b: disable auto update installing for extensions (after the check in 0301b)
+ * [SETTING] about:addons>Extensions>[cog-wheel-icon]>Update Add-ons Automatically (toggle) ***/
+//;user_pref("extensions.update.autoUpdateDefault", false);
+/* 0303: disable background update service [WINDOWS]
+ * [SETTING] General>Firefox Updates>Use a background service to install updates ***/
+user_pref("app.update.service.enabled", false);
+/* 0304: disable background update staging ***/
+user_pref("app.update.staging.enabled", false);
+/* 0305: enforce update information is displayed
+ * This is the update available, downloaded, error and success information ***/
+user_pref("app.update.silent", false);
+/* 0306: disable extension metadata updating
+ * sends daily pings to Mozilla about extensions and recent startups ***/
+user_pref("extensions.getAddons.cache.enabled", false);
+/* 0307: disable auto updating of personas (themes) ***/
+user_pref("lightweightThemes.update.enabled", false);
+/* 0308: disable search update
+ * [SETTING] General>Firefox Update>Automatically update search engines ***/
+user_pref("browser.search.update", false);
+/* 0309: disable sending Flash crash reports ***/
+user_pref("dom.ipc.plugins.flash.subprocess.crashreporter.enabled", false);
+/* 0310: disable sending the URL of the website where a plugin crashed ***/
+user_pref("dom.ipc.plugins.reportCrashURL", false);
+/* 0320: disable about:addons' Get Add-ons panel (uses Google-Analytics) ***/
+user_pref("extensions.getAddons.showPane", false); // hidden pref
+user_pref("extensions.webservice.discoverURL", "");
+/* 0330: disable telemetry
+ * the pref (.unified) affects the behaviour of the pref (.enabled)
+ * IF unified=false then .enabled controls the telemetry module
+ * IF unified=true then .enabled ONLY controls whether to record extended data
+ * so make sure to have both set as false
+ * [NOTE] FF58+ `toolkit.telemetry.enabled` is now LOCKED to reflect prerelease
+ * or release builds (true and false respectively), see [2]
+ * [1] https://firefox-source-docs.mozilla.org/toolkit/components/telemetry/telemetry/internals/preferences.html
+ * [2] https://medium.com/georg-fritzsche/data-preference-changes-in-firefox-58-2d5df9c428b5 ***/
+user_pref("toolkit.telemetry.unified", false);
+user_pref("toolkit.telemetry.enabled", false); // see [NOTE] above FF58+
+user_pref("toolkit.telemetry.server", "data:,");
+user_pref("toolkit.telemetry.archive.enabled", false);
+user_pref("toolkit.telemetry.cachedClientID", "");
+user_pref("toolkit.telemetry.newProfilePing.enabled", false); // (FF55+)
+user_pref("toolkit.telemetry.shutdownPingSender.enabled", false); // (FF55+)
+user_pref("toolkit.telemetry.updatePing.enabled", false); // (FF56+)
+user_pref("toolkit.telemetry.bhrPing.enabled", false); // (FF57+) Background Hang Reporter
+user_pref("toolkit.telemetry.firstShutdownPing.enabled", false); // (FF57+)
+user_pref("toolkit.telemetry.hybridContent.enabled", false); // (FF59+)
+/* 0333: disable health report
+ * [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to send technical... data ***/
+user_pref("datareporting.healthreport.uploadEnabled", false);
+/* 0334: disable new data submission, master kill switch (FF41+)
+ * If disabled, no policy is shown or upload takes place, ever
+ * [1] https://bugzilla.mozilla.org/1195552 ***/
+user_pref("datareporting.policy.dataSubmissionEnabled", false);
+/* 0350: disable crash reports ***/
+user_pref("breakpad.reportURL", "");
+/* 0351: disable sending of crash reports (FF44+)
+ * [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to send crash reports ***/
+user_pref("browser.tabs.crashReporting.sendReport", false);
+user_pref("browser.crashReports.unsubmittedCheck.enabled", false); // (FF51+)
+user_pref("browser.crashReports.unsubmittedCheck.autoSubmit", false); // (FF51-57)
+user_pref("browser.crashReports.unsubmittedCheck.autoSubmit2", false); // (FF58+)
+/* 0370: disable "Snippets" (Mozilla content shown on about:home screen)
+ * [1] https://wiki.mozilla.org/Firefox/Projects/Firefox_Start/Snippet_Service ***/
+user_pref("browser.aboutHomeSnippets.updateUrl", "data:,");
+/* 0380: disable Browser Error Reporter (FF60+)
+ * [1] https://support.mozilla.org/en-US/kb/firefox-nightly-error-collection
+ * [2] https://firefox-source-docs.mozilla.org/browser/browser/BrowserErrorReporter.html ***/
+user_pref("browser.chrome.errorReporter.enabled", false);
+user_pref("browser.chrome.errorReporter.submitUrl", "");
+/*** 0400: BLOCKLISTS / SAFE BROWSING / TRACKING PROTECTION
+ This section has security & tracking protection implications vs privacy concerns vs effectiveness
+ vs 3rd party 'censorship'. We DO NOT advocate no protection. If you disable Tracking Protection (TP)
+ and/or Safe Browsing (SB), then SECTION 0400 REQUIRES YOU HAVE uBLOCK ORIGIN INSTALLED.
+ Safe Browsing is designed to protect users from malicious sites. Tracking Protection is designed
+ to lessen the impact of third parties on websites to reduce tracking and to speed up your browsing.
+ These do rely on 3rd parties (Google for SB and Disconnect for TP), but many steps, which are
+ continually being improved, have been taken to preserve privacy. Disable at your own risk.
+user_pref("_user.js.parrot", "0400 syntax error: the parrot's passed on!");
+/* 0401: enable Firefox blocklist, but sanitize blocklist url
+ * [NOTE] It includes updates for "revoked certificates"
+ * [1] https://blog.mozilla.org/security/2015/03/03/revoking-intermediate-certificates-introducing-onecrl/
+ * [2] https://trac.torproject.org/projects/tor/ticket/16931 ***/
+user_pref("extensions.blocklist.enabled", true);
+user_pref("extensions.blocklist.url", "https://blocklists.settings.services.mozilla.com/v1/blocklist/3/%APP_ID%/%APP_VERSION%/");
+/* 0402: enable Kinto blocklist updates (FF50+)
+ * What is Kinto?: https://wiki.mozilla.org/Firefox/Kinto#Specifications
+ * As Firefox transitions to Kinto, the blocklists have been broken down into entries for certs to be
+ * revoked, extensions and plugins to be disabled, and gfx environments that cause problems or crashes ***/
+user_pref("services.blocklist.update_enabled", true);
+/* 0403: disable individual unwanted/unneeded parts of the Kinto blocklists ***/
+ // user_pref("services.blocklist.onecrl.collection", ""); // revoked certificates
+ // user_pref("services.blocklist.addons.collection", "");
+ // user_pref("services.blocklist.plugins.collection", "");
+ // user_pref("services.blocklist.gfx.collection", "");
+ This sub-section has been redesigned to differentiate between "real-time"/"user initiated"
+ data being sent to Google from all other settings such as using local blocklists/whitelists and
+ updating those lists. There are NO privacy issues here. *IF* required, a full url is never sent
+ to Google, only a PART-hash of the prefix, and this is hidden with noise of other real PART-hashes.
+ Google also swear it is anonymized and only used to flag malicious sites/activity. Firefox
+ also takes measures such as striping out identifying parameters and storing safe browsing
+ cookies in a separate jar. (#Turn on browser.safebrowsing.debug to monitor this activity)
+ #Required reading [#] https://feeding.cloud.geek.nz/posts/how-safe-browsing-works-in-firefox/
+ [1] https://wiki.mozilla.org/Security/Safe_Browsing ***/
+/* 0410: disable "Block dangerous and deceptive content" (under Options>Privacy & Security)
+ * This covers deceptive sites such as phishing and social engineering ***/
+ // user_pref("browser.safebrowsing.malware.enabled", false);
+ // user_pref("browser.safebrowsing.phishing.enabled", false); // (FF50+)
+/* 0411: disable "Block dangerous downloads" (under Options>Privacy & Security)
+ * This covers malware and PUPs (potentially unwanted programs) ***/
+ // user_pref("browser.safebrowsing.downloads.enabled", false);
+/* 0412: disable "Warn me about unwanted and uncommon software" (under Options>Privacy & Security) (FF48+) ***/
+ // user_pref("browser.safebrowsing.downloads.remote.block_potentially_unwanted", false);
+ // user_pref("browser.safebrowsing.downloads.remote.block_uncommon", false);
+ // user_pref("browser.safebrowsing.downloads.remote.block_dangerous", false); // (FF49+)
+ // user_pref("browser.safebrowsing.downloads.remote.block_dangerous_host", false); // (FF49+)
+/* 0413: disable Google safebrowsing updates ***/
+ // user_pref("browser.safebrowsing.provider.google.updateURL", "");
+ // user_pref("browser.safebrowsing.provider.google.gethashURL", "");
+ // user_pref("browser.safebrowsing.provider.google4.updateURL", ""); // (FF50+)
+ // user_pref("browser.safebrowsing.provider.google4.gethashURL", ""); // (FF50+)
+/* 0414: disable binaries NOT in local lists being checked by Google (real-time checking) ***/
+user_pref("browser.safebrowsing.downloads.remote.enabled", false);
+user_pref("browser.safebrowsing.downloads.remote.url", "");
+/* 0415: disable reporting URLs ***/
+user_pref("browser.safebrowsing.provider.google.reportURL", "");
+user_pref("browser.safebrowsing.reportPhishURL", "");
+user_pref("browser.safebrowsing.provider.google4.reportURL", ""); // (FF50+)
+user_pref("browser.safebrowsing.provider.google.reportMalwareMistakeURL", ""); // (FF54+)
+user_pref("browser.safebrowsing.provider.google.reportPhishMistakeURL", ""); // (FF54+)
+user_pref("browser.safebrowsing.provider.google4.reportMalwareMistakeURL", ""); // (FF54+)
+user_pref("browser.safebrowsing.provider.google4.reportPhishMistakeURL", ""); // (FF54+)
+/* 0416: disable 'ignore this warning' on Safe Browsing warnings which when clicked
+ * bypasses the block for that session. This is a means for admins to enforce SB
+ * [TEST] see github wiki APPENDIX A: Test Sites: Section 5
+ * [1] https://bugzilla.mozilla.org/1226490 ***/
+ // user_pref("browser.safebrowsing.allowOverride", false);
+/* 0417: disable data sharing (FF58+) ***/
+user_pref("browser.safebrowsing.provider.google4.dataSharing.enabled", false);
+user_pref("browser.safebrowsing.provider.google4.dataSharingURL", "");
+/** TRACKING PROTECTION (TP)
+ There are NO privacy concerns here, but we strongly recommend to use uBlock Origin as well,
+ as it offers more comprehensive and specialized lists. It also allows per domain control. ***/
+/* 0420: enable Tracking Protection in all windows
+ * [NOTE] TP sends DNT headers regardless of the DNT pref (see 1610)
+ * [1] https://wiki.mozilla.org/Security/Tracking_protection
+ * [2] https://support.mozilla.org/kb/tracking-protection-firefox ***/
+ // user_pref("privacy.trackingprotection.pbmode.enabled", true); // default: true
+ // user_pref("privacy.trackingprotection.enabled", true);
+/* 0421: enable more Tracking Protection choices under Options>Privacy & Security>Use Tracking Protection
+ * Displays three choices: "Always", "Only in private windows", "Never" ***/
+user_pref("privacy.trackingprotection.ui.enabled", true);
+/* 0422: set which Tracking Protection block list to use
+ * [WARNING] We don't recommend enforcing this from here, as available block lists can change
+ * [SETTING] Privacy & Security>Tracking Protection>Change Block List ***/
+ // user_pref("urlclassifier.trackingTable", "test-track-simple,base-track-digest256"); // basic
+/* 0423: disable Mozilla's blocklist for known Flash tracking/fingerprinting (FF48+)
+ * [1] https://www.ghacks.net/2016/07/18/firefox-48-blocklist-against-plugin-fingerprinting/
+ * [2] https://bugzilla.mozilla.org/1237198 ***/
+ // user_pref("browser.safebrowsing.blockedURIs.enabled", false);
+/* 0424: disable Mozilla's tracking protection and Flash blocklist updates ***/
+ // user_pref("browser.safebrowsing.provider.mozilla.gethashURL", "");
+ // user_pref("browser.safebrowsing.provider.mozilla.updateURL", "");
+/* 0425: disable passive Tracking Protection (FF53+)
+ * Passive TP annotates channels to lower the priority of network loads for resources on the tracking protection list
+ * [NOTE] It has no effect if TP is enabled, but keep in mind that by default TP is only enabled in Private Windows
+ * This is included for people who want to completely disable Tracking Protection.
+ * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1170190,1141814 ***/
+ // user_pref("privacy.trackingprotection.annotate_channels", false);
+ // user_pref("privacy.trackingprotection.lower_network_priority", false);
+/*** 0500: SYSTEM ADD-ONS / EXPERIMENTS
+ System Add-ons are a method for shipping extensions, considered to be
+ built-in features to Firefox, that are hidden from the about:addons UI.
+ To view your System Add-ons go to about:support, they are listed under "Firefox Features"
+ Some System Add-ons have no on-off prefs. Instead you can manually remove them. Note that app
+ updates will restore them. They may also be updated and possibly restored automatically (see 0505)
+ * Portable: "...\App\Firefox64\browser\features\" (or "App\Firefox\etc" for 32bit)
+ * Windows: "...\Program Files\Mozilla\browser\features" (or "Program Files (X86)\etc" for 32bit)
+ * Mac: "...\Applications\Firefox\Contents\Resources\browser\features\"
+ [NOTE] On Mac you can right-click on the application and select "Show Package Contents"
+ * Linux: "/usr/lib/firefox/browser/features" (or similar)
+ [1] https://firefox-source-docs.mozilla.org/toolkit/mozapps/extensions/addon-manager/SystemAddons.html
+ [2] https://dxr.mozilla.org/mozilla-central/source/browser/extensions
+user_pref("_user.js.parrot", "0500 syntax error: the parrot's cashed in 'is chips!");
+/* 0502: disable Mozilla permission to silently opt you into tests ***/
+user_pref("network.allow-experiments", false);
+/* 0503: disable Normandy/Shield (FF60+)
+ * Shield is an telemetry system (including Heartbeat) that can also push and test "recipes"
+ * [1] https://wiki.mozilla.org/Firefox/Shield
+ * [2] https://github.com/mozilla/normandy ***/
+user_pref("app.normandy.enabled", false);
+user_pref("app.normandy.api_url", "");
+user_pref("app.shield.optoutstudies.enabled", false);
+user_pref("shield.savant.enabled", false); // (FF61+)
+/* 0505: disable System Add-on updates
+ * [NOTE] In FF61 and lower, you will not get any System Add-on updates except when you update Firefox ***/
+ // user_pref("extensions.systemAddon.update.enabled", false); // (FF62+)
+ // user_pref("extensions.systemAddon.update.url", "");
+/* 0506: disable PingCentre telemetry (used in several System Add-ons) (FF57+)
+ * Currently blocked by 'datareporting.healthreport.uploadEnabled' (see 0333) ***/
+user_pref("browser.ping-centre.telemetry", false);
+/* 0510: disable Pocket (FF39+)
+ * Pocket is a third party (now owned by Mozilla) "save for later" cloud service
+ * [1] https://en.wikipedia.org/wiki/Pocket_(application)
+ * [2] https://www.gnu.gl/blog/Posts/multiple-vulnerabilities-in-pocket/ ***/
+user_pref("extensions.pocket.enabled", false);
+/* 0513: disable Follow On Search (FF53+)
+ * Just DELETE the XPI file in your System Add-ons directory
+ * [1] https://blog.mozilla.org/data/2017/06/05/measuring-search-in-firefox/ ***/
+/* 0514: disable Activity Stream (FF54+)
+ * Activity Stream is the default homepage/newtab in FF57+. It is based on metadata and browsing behavior,
+ * and includes telemetry and web content such as snippets, top stories (pocket), top sites, etc.
+ * - ONE: make sure to set your "home" and "newtab" to about:blank (or use an extension to control them)
+ * - TWO: DELETE the XPI file in your System Add-ons directory (note this get reinstalled on app updates)
+ * And/or you can try to control the ever-growing, ever-changing "browser.newtabpage.activity-stream.*" prefs
+ * [1] https://wiki.mozilla.org/Firefox/Activity_Stream
+ * [2] https://www.ghacks.net/2016/02/15/firefox-mockups-show-activity-stream-new-tab-page-and-share-updates/ ***/
+user_pref("browser.library.activity-stream.enabled", false); // (FF57+)
+/* 0515: disable Screenshots (FF55+)
+ * alternatively in FF60+, disable uploading to the Screenshots server
+ * [1] https://github.com/mozilla-services/screenshots
+ * [2] https://www.ghacks.net/2017/05/28/firefox-screenshots-integrated-in-firefox-nightly/ ***/
+ // user_pref("extensions.screenshots.disabled", true);
+ // user_pref("extensions.screenshots.upload-disabled", true); // (FF60+)
+/* 0516: disable Onboarding (FF55+)
+ * Onboarding is an interactive tour/setup for new installs/profiles and features. Every time
+ * about:home or about:newtab is opened, the onboarding overlay is injected into that page
+ * [NOTE] Onboarding uses Google Analytics [2], and leaks resource://URIs [3]
+ * [1] https://wiki.mozilla.org/Firefox/Onboarding
+ * [2] https://github.com/mozilla/onboard/commit/db4d6c8726c89a5d6a241c1b1065827b525c5baf
+ * [3] https://bugzilla.mozilla.org/863246#c154 ***/
+user_pref("browser.onboarding.enabled", false);
+/* 0517: disable Form Autofill (FF55+)
+ * [SETTING] Privacy & Security>Forms & Passwords>Enable Profile Autofill
+ * [NOTE] Stored data is NOT secure (uses a JSON file)
+ * [NOTE] Heuristics controls Form Autofill on forms without @autocomplete attributes
+ * [1] https://wiki.mozilla.org/Firefox/Features/Form_Autofill
+ * [2] https://www.ghacks.net/2017/05/24/firefoxs-new-form-autofill-is-awesome/ ***/
+user_pref("extensions.formautofill.addresses.enabled", false);
+user_pref("extensions.formautofill.available", "off"); // (FF56+)
+user_pref("extensions.formautofill.creditCards.enabled", false); // (FF56+)
+user_pref("extensions.formautofill.heuristics.enabled", false);
+/* 0518: disable Web Compatibility Reporter (FF56+)
+ * Web Compatibility Reporter adds a "Report Site Issue" button to send data to Mozilla ***/
+user_pref("extensions.webcompat-reporter.enabled", false);
+/*** 0600: BLOCK IMPLICIT OUTBOUND [not explicitly asked for - e.g. clicked on] ***/
+user_pref("_user.js.parrot", "0600 syntax error: the parrot's no more!");
+/* 0601: disable link prefetching
+ * [1] https://developer.mozilla.org/docs/Web/HTTP/Link_prefetching_FAQ ***/
+user_pref("network.prefetch-next", false);
+/* 0602: disable DNS prefetching
+ * [1] https://www.ghacks.net/2013/04/27/firefox-prefetching-what-you-need-to-know/
+ * [2] https://developer.mozilla.org/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control ***/
+user_pref("network.dns.disablePrefetch", true);
+user_pref("network.dns.disablePrefetchFromHTTPS", true); // (hidden pref)
+/* 0603a: disable Seer/Necko
+ * [1] https://developer.mozilla.org/docs/Mozilla/Projects/Necko ***/
+user_pref("network.predictor.enabled", false);
+/* 0603b: disable more Necko/Captive Portal
+ * [1] https://en.wikipedia.org/wiki/Captive_portal
+ * [2] https://wiki.mozilla.org/Necko/CaptivePortal
+ * [3] https://trac.torproject.org/projects/tor/ticket/21790 ***/
+user_pref("captivedetect.canonicalURL", "");
+user_pref("network.captive-portal-service.enabled", false); // (FF52+)
+/* 0605: disable link-mouseover opening connection to linked server
+ * [1] https://news.slashdot.org/story/15/08/14/2321202/how-to-quash-firefoxs-silent-requests
+ * [2] https://www.ghacks.net/2015/08/16/block-firefox-from-connecting-to-sites-when-you-hover-over-links/ ***/
+user_pref("network.http.speculative-parallel-limit", 0);
+/* 0606: disable pings (but enforce same host in case)
+ * [1] http://kb.mozillazine.org/Browser.send_pings
+ * [2] http://kb.mozillazine.org/Browser.send_pings.require_same_host ***/
+user_pref("browser.send_pings", false);
+user_pref("browser.send_pings.require_same_host", true);
+/* 0607: disable links launching Windows Store on Windows 8/8.1/10 [WINDOWS]
+ * [1] https://www.ghacks.net/2016/03/25/block-firefox-chrome-windows-store/ ***/
+user_pref("network.protocol-handler.external.ms-windows-store", false);
+/* 0608: disable predictor / prefetching (FF48+) ***/
+user_pref("network.predictor.enable-prefetch", false);
+/*** 0700: HTTP* / TCP/IP / DNS / PROXY / SOCKS etc ***/
+user_pref("_user.js.parrot", "0700 syntax error: the parrot's given up the ghost!");
+ * IPv6 can be abused, especially regarding MAC addresses. They also do not play nice
+ * with VPNs. That's even assuming your ISP and/or router and/or website can hande it
+ * [WARNING] This is just an application level fallback. Disabling IPv6 is best done
+ * at an OS/network level, and/or configured properly in VPN setups
+ * [TEST] http://ipv6leak.com/
+ * [1] https://github.com/ghacksuserjs/ghacks-user.js/issues/437#issuecomment-403740626
+ * [2] https://www.internetsociety.org/tag/ipv6-security/ (see Myths 2,4,5,6) ***/
+user_pref("network.dns.disableIPv6", true);
+/* 0702: disable HTTP2 (which was based on SPDY which is now deprecated)
+ * HTTP2 raises concerns with "multiplexing" and "server push", does nothing to enhance
+ * privacy, and in fact opens up a number of server-side fingerprinting opportunities
+ * [1] https://http2.github.io/faq/
+ * [2] https://blog.scottlogic.com/2014/11/07/http-2-a-quick-look.html
+ * [3] https://queue.acm.org/detail.cfm?id=2716278
+ * [4] https://github.com/ghacksuserjs/ghacks-user.js/issues/107 ***/
+//;user_pref("network.http.spdy.enabled", false);
+//;user_pref("network.http.spdy.enabled.deps", false);
+//;user_pref("network.http.spdy.enabled.http2", false);
+/* 0703: disable HTTP Alternative Services (FF37+)
+ * [1] https://www.ghacks.net/2015/08/18/a-comprehensive-list-of-firefox-privacy-and-security-settings/#comment-3970881
+ * [2] https://www.mnot.net/blog/2016/03/09/alt-svc ***/
+user_pref("network.http.altsvc.enabled", false);
+user_pref("network.http.altsvc.oe", false);
+/* 0704: enforce the proxy server to do any DNS lookups when using SOCKS
+ * e.g. in TOR, this stops your local DNS server from knowing your Tor destination
+ * as a remote Tor node will handle the DNS request
+ * [1] http://kb.mozillazine.org/Network.proxy.socks_remote_dns
+ * [2] https://trac.torproject.org/projects/tor/wiki/doc/TorifyHOWTO/WebBrowsers ***/
+user_pref("network.proxy.socks_remote_dns", true);
+/* 0706: remove paths when sending URLs to PAC scripts (FF51+)
+ * CVE-2017-5384: Information disclosure via Proxy Auto-Config (PAC)
+ * [1] https://bugzilla.mozilla.org/1255474 ***/
+user_pref("network.proxy.autoconfig_url.include_path", false); // default: false
+/* 0707: disable (or setup) DNS-over-HTTPS (DoH) (FF60+)
+ * TRR = Trusted Recursive Resolver
+ * .mode: 0=off, 1=race, 2=TRR first, 3=TRR only, 4=race for stats, but always use native result
+ * [WARNING] DoH bypasses hosts and gives info to yet another party (e.g. Cloudflare)
+ * [1] https://www.ghacks.net/2018/04/02/configure-dns-over-https-in-firefox/
+ * [2] https://hacks.mozilla.org/2018/05/a-cartoon-intro-to-dns-over-https/ ***/
+ // user_pref("network.trr.mode", 0);
+ // user_pref("network.trr.bootstrapAddress", "");
+ // user_pref("network.trr.uri", "");
+/* 0708: disable FTP (FF60+)
+ * [1] https://www.ghacks.net/2018/02/20/firefox-60-with-new-preference-to-disable-ftp/ ***/
+ // user_pref("network.ftp.enabled", false);
+/* 0709: disable using UNC (Uniform Naming Convention) paths (FF61+)
+ * [1] https://trac.torproject.org/projects/tor/ticket/26424 ***/
+user_pref("network.file.disable_unc_paths", true); // (hidden pref)
+/*** 0800: LOCATION BAR / SEARCH BAR / SUGGESTIONS / HISTORY / FORMS [SETUP]
+ If you are in a private environment (no unwanted eyeballs) and your device is private
+ (restricted access), and the device is secure when unattended (locked, encrypted, forensic
+ hardened), then items 0850 and above can be relaxed in return for more convenience and
+ functionality. Likewise, you may want to check the items cleared on shutdown in section 2800.
+ [NOTE] The urlbar is also commonly referred to as the location bar and address bar
+ #Required reading [#] https://xkcd.com/538/
+user_pref("_user.js.parrot", "0800 syntax error: the parrot's ceased to be!");
+/* 0801: disable location bar using search - PRIVACY
+ * don't leak typos to a search engine, give an error message instead ***/
+user_pref("keyword.enabled", false);
+/* 0802: disable location bar domain guessing - PRIVACY/SECURITY
+ * domain guessing intercepts DNS "hostname not found errors" and resends a
+ * request (e.g. by adding www or .com). This is inconsistent use (e.g. FQDNs), does not work
+ * via Proxy Servers (different error), is a flawed use of DNS (TLDs: why treat .com
+ * as the 411 for DNS errors?), privacy issues (why connect to sites you didn't
+ * intend to), can leak sensitive data (e.g. query strings: e.g. Princeton attack),
+ * and is a security risk (e.g. common typos & malicious sites set up to exploit this) ***/
+user_pref("browser.fixup.alternate.enabled", false);
+/* 0803: display all parts of the url in the location bar - helps SECURITY ***/
+user_pref("browser.urlbar.trimURLs", false);
+/* 0804: limit history leaks via enumeration (PER TAB: back/forward) - PRIVACY
+ * This is a PER TAB session history. You still have a full history stored under all history
+ * default=50, minimum=1=currentpage, 2 is the recommended minimum as some pages
+ * use it as a means of referral (e.g. hotlinking), 4 or 6 or 10 may be more practical ***/
+user_pref("browser.sessionhistory.max_entries", 10);
+/* 0805: disable CSS querying page history - CSS history leak - PRIVACY
+ * [NOTE] This has NEVER been fully "resolved": in Mozilla/docs it is stated it's
+ * only in 'certain circumstances', also see latest comments in [2]
+ * [TEST] http://lcamtuf.coredump.cx/yahh/ (see github wiki APPENDIX C on how to use)
+ * [1] https://dbaron.org/mozilla/visited-privacy
+ * [2] https://bugzilla.mozilla.org/147777
+ * [3] https://developer.mozilla.org/docs/Web/CSS/Privacy_and_the_:visited_selector ***/
+user_pref("layout.css.visited_links_enabled", false);
+/* 0806: disable displaying javascript in history URLs - SECURITY ***/
+user_pref("browser.urlbar.filter.javascript", true);
+/* 0807: disable search bar LIVE search suggestions - PRIVACY
+ * [SETTING] Search>Provide search suggestions ***/
+user_pref("browser.search.suggest.enabled", false);
+/* 0808: disable location bar LIVE search suggestions (requires 0807 = true) - PRIVACY
+ * Also disable the location bar prompt to enable/disable or learn more about it.
+ * [SETTING] Search>Show search suggestions in address bar results ***/
+user_pref("browser.urlbar.suggest.searches", false);
+user_pref("browser.urlbar.userMadeSearchSuggestionsChoice", true); // (FF41+)
+/* 0809: disable location bar suggesting "preloaded" top websites (FF54+)
+ * [1] https://bugzilla.mozilla.org/1211726 ***/
+user_pref("browser.urlbar.usepreloadedtopurls.enabled", false);
+/* 0810: disable location bar making speculative connections (FF56+)
+ * [1] https://bugzilla.mozilla.org/1348275 ***/
+user_pref("browser.urlbar.speculativeConnect.enabled", false);
+/* 0850a: disable location bar autocomplete and suggestion types
+ * If you enforce any of the suggestion types, you MUST enforce 'autocomplete'
+ * - If *ALL* of the suggestion types are false, 'autocomplete' must also be false
+ * - If *ANY* of the suggestion types are true, 'autocomplete' must also be true
+ * [SETTING] Privacy & Security>Address Bar>When using the address bar, suggest
+ * [WARNING] If all three suggestion types are false, search engine keywords are disabled ***/
+//;user_pref("browser.urlbar.autocomplete.enabled", false);
+//;user_pref("browser.urlbar.suggest.history", false);
+//;user_pref("browser.urlbar.suggest.bookmark", false);
+//;user_pref("browser.urlbar.suggest.openpage", false);
+/* 0850c: disable location bar dropdown
+ * This value controls the total number of entries to appear in the location bar dropdown
+ * [NOTE] Items (bookmarks/history/openpages) with a high "frecency"/"bonus" will always
+ * be displayed (no we do not know how these are calculated or what the threshold is),
+ * and this does not affect the search by search engine suggestion (see 0808)
+ * [USAGE] This setting is only useful if you want to enable search engine keywords
+ * (i.e. at least one of 0850a suggestion types must be true) but you want to *limit* suggestions shown ***/
+ // user_pref("browser.urlbar.maxRichResults", 0);
+/* 0850d: disable location bar autofill
+ * [1] http://kb.mozillazine.org/Inline_autocomplete ***/
+user_pref("browser.urlbar.autoFill", false);
+/* 0850e: disable location bar one-off searches (FF51+)
+ * [1] https://www.ghacks.net/2016/08/09/firefox-one-off-searches-address-bar/ ***/
+user_pref("browser.urlbar.oneOffSearches", false);
+/* 0850f: disable location bar suggesting local search history (FF57+)
+ * [1] https://bugzilla.mozilla.org/1181644 ***/
+user_pref("browser.urlbar.maxHistoricalSearchSuggestions", 0); // max. number of search suggestions
+/* 0860: disable search and form history
+ * [SETTING] Privacy & Security>History>Custom Settings>Remember search and form history
+ * [NOTE] You can clear formdata on exiting Firefox (see 2803) ***/
+user_pref("browser.formfill.enable", false);
+/* 0862: disable browsing and download history
+ * [SETTING] Privacy & Security>History>Custom Settings>Remember my browsing and download history
+ * [NOTE] You can clear history and downloads on exiting Firefox (see 2803) ***/
+ // user_pref("places.history.enabled", false);
+/* 0870: disable Windows jumplist [WINDOWS] ***/
+user_pref("browser.taskbar.lists.enabled", false);
+user_pref("browser.taskbar.lists.frequent.enabled", false);
+user_pref("browser.taskbar.lists.recent.enabled", false);
+user_pref("browser.taskbar.lists.tasks.enabled", false);
+/* 0871: disable Windows taskbar preview [WINDOWS] ***/
+user_pref("browser.taskbar.previews.enable", false);
+/*** 0900: PASSWORDS ***/
+user_pref("_user.js.parrot", "0900 syntax error: the parrot's expired!");
+/* 0901: disable saving passwords
+ * [SETTING] Privacy & Security>Forms & Passwords>Remember logins and passwords for sites
+ * [NOTE] This does not clear any passwords already saved ***/
+ // user_pref("signon.rememberSignons", false);
+/* 0902: use a master password (recommended if you save passwords)
+ * There are no preferences for this. It is all handled internally.
+ * [SETTING] Privacy & Security>Forms & Passwords>Use a master password
+ * [1] https://support.mozilla.org/kb/use-master-password-protect-stored-logins ***/
+/* 0903: set how often Firefox should ask for the master password
+ * 0=the first time (default), 1=every time it's needed, 2=every n minutes (as per the next pref) ***/
+user_pref("security.ask_for_password", 2);
+/* 0904: set how often in minutes Firefox should ask for the master password (see pref above)
+ * in minutes, default is 30 ***/
+user_pref("security.password_lifetime", 5);
+/* 0905: disable auto-filling username & password form fields - SECURITY
+ * can leak in cross-site forms AND be spoofed
+ * [NOTE] Password will still be auto-filled after a user name is manually entered
+ * [1] http://kb.mozillazine.org/Signon.autofillForms ***/
+user_pref("signon.autofillForms", false);
+/* 0906: disable websites' autocomplete="off" (FF30+)
+ * Don't let sites dictate use of saved logins and passwords. Increase security through
+ * stronger password use. The trade-off is the convenience. Some sites should never be
+ * saved (such as banking sites). Set at true, informed users can make their own choice. ***/
+user_pref("signon.storeWhenAutocompleteOff", true); // default: true
+/* 0907: display warnings for logins on non-secure (non HTTPS) pages
+ * [1] https://bugzilla.mozilla.org/1217156 ***/
+user_pref("security.insecure_password.ui.enabled", true);
+/* 0908: remove user & password info when attempting to fix an entered URL (i.e. 0802 is true)
+ * e.g. //user:password@foo -> //user@(prefix)foo(suffix) NOT //user:password@(prefix)foo(suffix) ***/
+user_pref("browser.fixup.hide_user_pass", true);
+/* 0909: disable formless login capture for Password Manager (FF51+) ***/
+user_pref("signon.formlessCapture.enabled", false);
+/* 0910: disable autofilling saved passwords on HTTP pages and show warning (FF52+)
+ * [1] https://www.fxsitecompat.com/en-CA/docs/2017/insecure-login-forms-now-disable-autofill-show-warning-beneath-input-control/
+ * [2] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1217152,1319119 ***/
+user_pref("signon.autofillForms.http", false);
+user_pref("security.insecure_field_warning.contextual.enabled", true);
+/* 0911: prevent cross-origin images from triggering an HTTP-Authentication prompt (FF55+)
+ * [1] https://bugzilla.mozilla.org/1357835 ***/
+user_pref("network.auth.subresource-img-cross-origin-http-auth-allow", false);
+/*** 1000: CACHE [SETUP]
+ ETAG [1] and other [2] cache tracking/fingerprinting techniques can be averted by
+ disabling *BOTH* disk (1001) and memory (1003) cache. ETAGs can also be neutralized
+ by modifying response headers [3]. Another solution is to use a hardened configuration
+ with Temporary Containers [4]. Alternatively, you can *LIMIT* exposure by clearing
+ cache on close (2803). or on a regular basis manually or with an extension.
+ [1] https://en.wikipedia.org/wiki/HTTP_ETag#Tracking_using_ETags
+ [2] https://robertheaton.com/2014/01/20/cookieless-user-tracking-for-douchebags/
+ [3] https://github.com/ghacksuserjs/ghacks-user.js/wiki/4.2.4-Header-Editor
+ [4] https://medium.com/@stoically/enhance-your-privacy-in-firefox-with-temporary-containers-33925cd6cd21
+user_pref("_user.js.parrot", "1000 syntax error: the parrot's gone to meet 'is maker!");
+/* 1001: disable disk cache ***/
+//;user_pref("browser.cache.disk.enable", false);
+//;user_pref("browser.cache.disk.capacity", 0);
+//;user_pref("browser.cache.disk.smart_size.enabled", false);
+//;user_pref("browser.cache.disk.smart_size.first_run", false);
+/* 1002: disable disk cache for SSL pages
+ * [1] http://kb.mozillazine.org/Browser.cache.disk_cache_ssl ***/
+//;user_pref("browser.cache.disk_cache_ssl", false);
+/* 1003: disable memory cache
+ * [NOTE] Not recommended due to performance issues ***/
+ // user_pref("browser.cache.memory.enable", false);
+ // user_pref("browser.cache.memory.capacity", 0); // (hidden pref)
+/* 1005: disable fastback cache
+ * To improve performance when pressing back/forward Firefox stores visited pages
+ * so they don't have to be re-parsed. This is not the same as memory cache.
+ * 0=none, -1=auto (that's minus 1), or for other values see [1]
+ * [NOTE] Not recommended unless you know what you're doing
+ * [1] http://kb.mozillazine.org/Browser.sessionhistory.max_total_viewers ***/
+ // user_pref("browser.sessionhistory.max_total_viewers", 0);
+/* 1006: disable permissions manager from writing to disk [RESTART]
+ * [NOTE] This means any permission changes are session only
+ * [1] https://bugzilla.mozilla.org/967812 ***/
+ // user_pref("permissions.memory_only", true); // (hidden pref)
+/* 1008: set DNS cache and expiration time (default 400 and 60, same as TBB) ***/
+ // user_pref("network.dnsCacheEntries", 400);
+ // user_pref("network.dnsCacheExpiration", 60);
+/** SESSIONS & SESSION RESTORE ***/
+/* 1020: disable the Session Restore service completely
+ * [WARNING] [SETUP] This also disables the "Recently Closed Tabs" feature
+ * It does not affect "Recently Closed Windows" or any history. ***/
+//;user_pref("browser.sessionstore.max_tabs_undo", 0);
+user_pref("browser.sessionstore.max_windows_undo", 0);
+/* 1021: disable storing extra session data
+ * extra session data contains contents of forms, scrollbar positions, cookies and POST data
+ * define on which sites to save extra session data:
+ * 0=everywhere, 1=unencrypted sites, 2=nowhere ***/
+user_pref("browser.sessionstore.privacy_level", 0);
+/* 1022: disable resuming session from crash [SETUP] ***/
+user_pref("browser.sessionstore.resume_from_crash", false);
+/* 1023: set the minimum interval between session save operations - increasing it
+ * can help on older machines and some websites, as well as reducing writes, see [1]
+ * Default is 15000 (15 secs). Try 30000 (30sec), 60000 (1min) etc
+ * [WARNING] This can also affect entries in the "Recently Closed Tabs" feature:
+ * i.e. the longer the interval the more chance a quick tab open/close won't be captured.
+ * This longer interval *may* affect history but we cannot replicate any history not recorded
+ * [1] https://bugzilla.mozilla.org/1304389 ***/
+user_pref("browser.sessionstore.interval", 30000);
+/* 1030: disable favicons in shortcuts
+ * URL shortcuts use a cached randomly named .ico file which is stored in your
+ * profile/shortcutCache directory. The .ico remains after the shortcut is deleted.
+ * If set to false then the shortcuts use a generic Firefox icon ***/
+user_pref("browser.shell.shortcutFavicons", false);
+/* 1031: disable favicons in tabs and new bookmarks
+ * bookmark favicons are stored as data blobs in places.sqlite>moz_favicons ***/
+ // user_pref("browser.chrome.site_icons", false);
+ // user_pref("browser.chrome.favicons", false);
+/* 1032: disable favicons in web notifications ***/
+//;user_pref("alerts.showFavicons", false); // default: false
+/*** 1200: HTTPS ( SSL/TLS / OCSP / CERTS / HSTS / HPKP / CIPHERS )
+ Note that your cipher and other settings can be used server side as a fingerprint attack
+ vector, see [1] (It's quite technical but the first part is easy to understand
+ and you can stop reading when you reach the second section titled "Enter Bro")
+ Option 1: Use Firefox defaults for the 1260's items (item 1260 default for SHA-1, is local
+ only anyway). There is nothing *weak* about Firefox's defaults, but Mozilla (and
+ other browsers) will always lag for fear of breakage and upset end-users
+ Option 2: Disable the ciphers in 1261, 1262 and 1263. These shouldn't break anything.
+ Optionally, disable the ciphers in 1264.
+ [1] https://www.securityartwork.es/2017/02/02/tls-client-fingerprinting-with-bro/
+user_pref("_user.js.parrot", "1200 syntax error: the parrot's a stiff!");
+/** SSL (Secure Sockets Layer) / TLS (Transport Layer Security) ***/
+/* 1201: disable old SSL/TLS - vulnerable to a MiTM attack
+ * [WARNING] Tested Feb 2017 - still breaks too many sites
+ * [1] https://wiki.mozilla.org/Security:Renegotiation ***/
+ // user_pref("security.ssl.require_safe_negotiation", true);
+/* 1202: control TLS versions with min and max
+ * 1=min version of TLS 1.0, 2=min version of TLS 1.1, 3=min version of TLS 1.2 etc
+ * [NOTE] Jul-2017: Telemetry indicates approx 2% of TLS web traffic uses 1.0 or 1.1
+ * [WARNING] If you get an "SSL_ERROR_NO_CYPHER_OVERLAP" error, temporarily
+ * set a lower value for 'security.tls.version.min' in about:config
+ * [1] http://kb.mozillazine.org/Security.tls.version.*
+ * [2] https://www.ssl.com/how-to/turn-off-ssl-3-0-and-tls-1-0-in-your-browser/
+ * [2] archived: https://archive.is/hY2Mm ***/
+//;user_pref("security.tls.version.min", 3);
+//;user_pref("security.tls.version.max", 4); // 4 = allow up to and including TLS 1.3
+/* 1203: disable SSL session tracking (FF36+)
+ * SSL Session IDs speed up HTTPS connections (no need to renegotiate) and last for 48hrs.
+ * Since the ID is unique, web servers can (and do) use it for tracking. If set to true,
+ * this disables sending SSL Session IDs and TLS Session Tickets to prevent session tracking
+ * [1] https://tools.ietf.org/html/rfc5077
+ * [2] https://bugzilla.mozilla.org/967977 ***/
+user_pref("security.ssl.disable_session_identifiers", true); // (hidden pref)
+/* 1204: disable SSL Error Reporting
+ * [1] https://firefox-source-docs.mozilla.org/browser/base/sslerrorreport/preferences.html ***/
+user_pref("security.ssl.errorReporting.automatic", false);
+user_pref("security.ssl.errorReporting.enabled", false);
+user_pref("security.ssl.errorReporting.url", "");
+/* 1205: disable TLS1.3 0-RTT (round-trip time) (FF51+)
+ * [1] https://github.com/tlswg/tls13-spec/issues/1001
+ * [2] https://blog.cloudflare.com/tls-1-3-overview-and-q-and-a/ ***/
+user_pref("security.tls.enable_0rtt_data", false); // (FF55+ default true)
+/** OCSP (Online Certificate Status Protocol)
+ #Required reading [#] https://scotthelme.co.uk/revocation-is-broken/ ***/
+/* 1210: enable OCSP Stapling
+ * [1] https://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox/ ***/
+user_pref("security.ssl.enable_ocsp_stapling", true);
+/* 1211: control when to use OCSP fetching (to confirm current validity of certificates)
+ * 0=disabled, 1=enabled (default), 2=enabled for EV certificates only
+ * OCSP (non-stapled) leaks information about the sites you visit to the CA (cert authority)
+ * It's a trade-off between security (checking) and privacy (leaking info to the CA)
+ * [NOTE] This pref only controls OCSP fetching and does not affect OCSP stapling
+ * [1] https://en.wikipedia.org/wiki/Ocsp ***/
+user_pref("security.OCSP.enabled", 1);
+/* 1212: set OCSP fetch failures (non-stapled, see 1211) to hard-fail
+ * When a CA cannot be reached to validate a cert, Firefox just continues the connection (=soft-fail)
+ * Setting this pref to true tells Firefox to instead terminate the connection (=hard-fail)
+ * It is pointless to soft-fail when an OCSP fetch fails: you cannot confirm a cert is still valid (it
+ * could have been revoked) and/or you could be under attack (e.g. malicious blocking of OCSP servers)
+ * [1] https://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox/
+ * [2] https://www.imperialviolet.org/2014/04/19/revchecking.html ***/
+user_pref("security.OCSP.require", true);
+/** CERTS / HSTS (HTTP Strict Transport Security) / HPKP (HTTP Public Key Pinning) ***/
+/* 1220: disable Windows 8.1's Microsoft Family Safety cert [WINDOWS] (FF50+)
+ * 0=disable detecting Family Safety mode and importing the root
+ * 1=only attempt to detect Family Safety mode (don't import the root)
+ * 2=detect Family Safety mode and import the root
+ * [1] https://trac.torproject.org/projects/tor/ticket/21686 ***/
+user_pref("security.family_safety.mode", 0);
+/* 1221: disable intermediate certificate caching (fingerprinting attack vector) [RESTART]
+ * [NOTE] This may be better handled under FPI (ticket 1323644, part of Tor Uplift)
+ * [WARNING] This affects login/cert/key dbs. The effect is all credentials are session-only.
+ * Saved logins and passwords are not available. Reset the pref and restart to return them.
+ * [TEST] https://fiprinca.0x90.eu/poc/
+ * [1] https://bugzilla.mozilla.org/1334485 - related bug
+ * [2] https://bugzilla.mozilla.org/1216882 - related bug (see comment 9) ***/
+ // user_pref("security.nocertdb", true); // (hidden pref)
+/* 1222: enforce strict pinning
+ * PKP (Public Key Pinning) 0=disabled 1=allow user MiTM (such as your antivirus), 2=strict
+ * [WARNING] If you rely on an AV (antivirus) to protect your web browsing
+ * by inspecting ALL your web traffic, then leave at current default=1
+ * [1] https://trac.torproject.org/projects/tor/ticket/16206 ***/
+user_pref("security.cert_pinning.enforcement_level", 2);
+/* 1240: disable insecure active content on https pages - mixed content
+ * [1] https://trac.torproject.org/projects/tor/ticket/21323 ***/
+user_pref("security.mixed_content.block_active_content", true);
+/* 1241: disable insecure passive content (such as images) on https pages - mixed context ***/
+user_pref("security.mixed_content.block_display_content", true);
+/** CIPHERS [see the section 1200 intro] ***/
+/* 1260: disable or limit SHA-1
+ * 0=all SHA1 certs are allowed
+ * 1=all SHA1 certs are blocked (including perfectly valid ones from 2015 and earlier)
+ * 2=deprecated option that now maps to 1
+ * 3=only allowed for locally-added roots (e.g. anti-virus)
+ * 4=only allowed for locally-added roots or for certs in 2015 and earlier
+ * [WARNING] When disabled, some man-in-the-middle devices (e.g. security scanners and
+ * antivirus products, may fail to connect to HTTPS sites. SHA-1 is *almost* obsolete.
+ * [1] https://blog.mozilla.org/security/2016/10/18/phasing-out-sha-1-on-the-public-web/ ***/
+user_pref("security.pki.sha1_enforcement_level", 1);
+/* 1261: disable 3DES (effective key size < 128)
+ * [1] https://en.wikipedia.org/wiki/3des#Security
+ * [2] http://en.citizendium.org/wiki/Meet-in-the-middle_attack
+ * [3] https://www-archive.mozilla.org/projects/security/pki/nss/ssl/fips-ssl-ciphersuites.html ***/
+ // user_pref("security.ssl3.rsa_des_ede3_sha", false);
+/* 1262: disable 128 bits ***/
+ // user_pref("security.ssl3.ecdhe_ecdsa_aes_128_sha", false);
+ // user_pref("security.ssl3.ecdhe_rsa_aes_128_sha", false);
+/* 1263: disable DHE (Diffie-Hellman Key Exchange)
+ * [WARNING] May break obscure sites, but not major sites, which should support ECDH over DHE
+ * [1] https://www.eff.org/deeplinks/2015/10/how-to-protect-yourself-from-nsa-attacks-1024-bit-DH ***/
+ // user_pref("security.ssl3.dhe_rsa_aes_128_sha", false);
+ // user_pref("security.ssl3.dhe_rsa_aes_256_sha", false);
+/* 1264: disable the remaining non-modern cipher suites as of FF52
+ * [NOTE] Commented out because it still breaks too many sites ***/
+ // user_pref("security.ssl3.rsa_aes_128_sha", false);
+ // user_pref("security.ssl3.rsa_aes_256_sha", false);
+/** UI (User Interface) ***/
+/* 1270: display warning (red padlock) for "broken security"
+ * [1] https://wiki.mozilla.org/Security:Renegotiation ***/
+user_pref("security.ssl.treat_unsafe_negotiation_as_broken", true);
+/* 1271: control "Add Security Exception" dialog on SSL warnings
+ * 0=do neither 1=pre-populate url 2=pre-populate url + pre-fetch cert (default)
+ * [1] https://github.com/pyllyukko/user.js/issues/210 ***/
+user_pref("browser.ssl_override_behavior", 1);
+/* 1272: display advanced information on Insecure Connection warning pages
+ * only works when it's possible to add an exception
+ * i.e. it doesn't work for HSTS discrepancies (https://subdomain.preloaded-hsts.badssl.com/)
+ * [TEST] https://expired.badssl.com/ ***/
+user_pref("browser.xul.error_pages.expert_bad_cert", true);
+/* 1273: display "insecure" icon (FF59+) and "Not Secure" text (FF60+) on HTTP sites ***/
+user_pref("security.insecure_connection_icon.enabled", true); // all windows
+user_pref("security.insecure_connection_text.enabled", true);
+ // user_pref("security.insecure_connection_icon.pbmode.enabled", true); // private windows only
+ // user_pref("security.insecure_connection_text.pbmode.enabled", true);
+user_pref("_user.js.parrot", "1400 syntax error: the parrot's bereft of life!");
+/* 1401: disable websites choosing fonts (0=block, 1=allow)
+ * If you disallow fonts, this drastically limits/reduces font
+ * enumeration (by JS) which is a high entropy fingerprinting vector.
+ * [SETTING] General>Language and Appearance>Advanced>Allow pages to choose...
+ * [SETUP] Disabling fonts can uglify the web a fair bit. ***/
+user_pref("browser.display.use_document_fonts", 0);
+/* 1402: set more legible default fonts [SETUP]
+ * [SETTING] General>Language and Appearance>Fonts & Colors>Advanced>Serif|Sans-serif|Monospace
+ * [NOTE] Example below for Windows/Western only ***/
+ // user_pref("font.name.serif.x-unicode", "Georgia");
+ // user_pref("font.name.serif.x-western", "Georgia"); // default: Times New Roman
+ // user_pref("font.name.sans-serif.x-unicode", "Arial");
+ // user_pref("font.name.sans-serif.x-western", "Arial"); // default: Arial
+ // user_pref("font.name.monospace.x-unicode", "Lucida Console");
+ // user_pref("font.name.monospace.x-western", "Lucida Console"); // default: Courier New
+/* 1403: enable icon fonts (glyphs) (FF41+)
+ * [1] https://bugzilla.mozilla.org/789788 ***/
+user_pref("gfx.downloadable_fonts.enabled", true); // default: true
+/* 1404: disable rendering of SVG OpenType fonts
+ * [1] https://wiki.mozilla.org/SVGOpenTypeFonts - iSECPartnersReport recommends to disable this ***/
+user_pref("gfx.font_rendering.opentype_svg.enabled", false);
+/* 1405: disable WOFF2 (Web Open Font Format) (FF35+) ***/
+user_pref("gfx.downloadable_fonts.woff2.enabled", false);
+/* 1406: disable CSS Font Loading API
+ * [SETUP] Disabling fonts can uglify the web a fair bit. ***/
+user_pref("layout.css.font-loading-api.enabled", false);
+/* 1407: disable special underline handling for a few fonts which you will probably never use [RESTART]
+ * Any of these fonts on your system can be enumerated for fingerprinting.
+ * [1] http://kb.mozillazine.org/Font.blacklist.underline_offset ***/
+user_pref("font.blacklist.underline_offset", "");
+/* 1408: disable graphite which FF49 turned back on by default
+ * In the past it had security issues. Update: This continues to be the case, see [1]
+ * [1] https://www.mozilla.org/security/advisories/mfsa2017-15/#CVE-2017-7778 ***/
+user_pref("gfx.font_rendering.graphite.enabled", false);
+/* 1409: limit system font exposure to a whitelist (FF52+) [SETUP] [RESTART]
+ * If the whitelist is empty, then whitelisting is considered disabled and all fonts are allowed.
+ * [NOTE] Creating your own probably highly-unique whitelist will raise your entropy. If
+ * you block sites choosing fonts in 1401, this preference is irrelevant. In future,
+ * privacy.resistFingerprinting (see 4500) may cover this, and 1401 can be relaxed.
+ * [1] https://bugzilla.mozilla.org/1121643 ***/
+ // user_pref("font.system.whitelist", ""); // (hidden pref)
+/*** 1600: HEADERS / REFERERS
+ Only *cross domain* referers need controlling and XOriginPolicy (1603) is perfect for that. Thus we enforce
+ the default values for 1601, 1602, 1605 and 1606 to minimize breakage, and only tweak 1603 and 1604.
+ Our default settings provide the best balance between protection and amount of breakage.
+ To harden it a bit more you can set XOriginPolicy (1603) to 2 (+ optionally 1604 to 1 or 2).
+ To fix broken sites (including your modem/router), temporarily set XOriginPolicy=0 and XOriginTrimmingPolicy=2 in about:config,
+ use the site and then change the values back. If you visit those sites regularly (e.g. Vimeo), use an extension.
+ full URI: https://example.com:8888/foo/bar.html?id=1234
+ scheme+host+path+port: https://example.com:8888/foo/bar.html
+ scheme+host+port: https://example.com:8888
+ #Required reading [#] https://feeding.cloud.geek.nz/posts/tweaking-referrer-for-privacy-in-firefox/
+user_pref("_user.js.parrot", "1600 syntax error: the parrot rests in peace!");
+/* 1601: ALL: control when images/links send a referer
+ * 0=never, 1=send only when links are clicked, 2=for links and images (default) ***/
+user_pref("network.http.sendRefererHeader", 2);
+/* 1602: ALL: control the amount of information to send
+ * 0=send full URI (default), 1=scheme+host+path+port, 2=scheme+host+port ***/
+user_pref("network.http.referer.trimmingPolicy", 0);
+/* 1603: CROSS ORIGIN: control when to send a referer [SETUP]
+ * 0=always (default), 1=only if base domains match, 2=only if hosts match ***/
+user_pref("network.http.referer.XOriginPolicy", 1);
+/* 1604: CROSS ORIGIN: control the amount of information to send (FF52+)
+ * 0=send full URI (default), 1=scheme+host+path+port, 2=scheme+host+port ***/
+user_pref("network.http.referer.XOriginTrimmingPolicy", 0);
+/* 1605: ALL: disable spoofing a referer
+ * [WARNING] Spoofing effectively disables the anti-CSRF (Cross-Site Request Forgery) protections that some sites may rely on ***/
+user_pref("network.http.referer.spoofSource", false);
+/* 1606: ALL: set the default Referrer Policy
+ * 0=no-referer, 1=same-origin, 2=strict-origin-when-cross-origin, 3=no-referrer-when-downgrade
+ * [NOTE] This is only a default, it can be overridden by a site-controlled Referrer Policy
+ * [1] https://www.w3.org/TR/referrer-policy/
+ * [2] https://developer.mozilla.org/docs/Web/HTTP/Headers/Referrer-Policy
+ * [3] https://blog.mozilla.org/security/2018/01/31/preventing-data-leaks-by-stripping-path-information-in-http-referrers/ ***/
+user_pref("network.http.referer.defaultPolicy", 3); // (FF59+) default: 3
+user_pref("network.http.referer.defaultPolicy.pbmode", 2); // (FF59+) default: 2
+/* 1607: TOR: hide (not spoof) referrer when leaving a .onion domain (FF54+)
+ * [NOTE] Firefox cannot access .onion sites by default. We recommend you use
+ * TBB (Tor Browser Bundle) which is specifically designed for the dark web
+ * [1] https://bugzilla.mozilla.org/1305144 ***/
+user_pref("network.http.referer.hideOnionSource", true);
+/* 1610: ALL: enable the DNT (Do Not Track) HTTP header
+ * [SETTING] Privacy & Security>Tracking Protecting>Send websites a "Do Not Track"...
+ * [NOTE] DNT is enforced with TP (see 0420) regardless of this pref ***/
+user_pref("privacy.donottrackheader.enabled", true);
+/*** 1700: CONTAINERS [SETUP]
+ [1] https://support.mozilla.org/kb/containers-experiment
+ [2] https://wiki.mozilla.org/Security/Contextual_Identity_Project/Containers
+ [3] https://github.com/mozilla/testpilot-containers
+user_pref("_user.js.parrot", "1700 syntax error: the parrot's bit the dust!");
+/* 1701: enable Container Tabs setting in preferences (see 1702) (FF50+)
+ * [1] https://bugzilla.mozilla.org/1279029 ***/
+ // user_pref("privacy.userContext.ui.enabled", true);
+/* 1702: enable Container Tabs (FF50+)
+ * [SETTING] Privacy & Security>Tabs>Enable Container Tabs ***/
+ // user_pref("privacy.userContext.enabled", true);
+/* 1703: enable a private container for thumbnail loads (FF51+) ***/
+ // user_pref("privacy.usercontext.about_newtab_segregation.enabled", true);
+/* 1704: set long press behaviour on "+ Tab" button to display container menu (FF53+)
+ * 0=disables long press, 1=when clicked, the menu is shown
+ * 2=the menu is shown after X milliseconds
+ * [NOTE] The menu does not contain a non-container tab option
+ * [1] https://bugzilla.mozilla.org/1328756 ***/
+ // user_pref("privacy.userContext.longPressBehavior", 2);
+user_pref("_user.js.parrot", "1800 syntax error: the parrot's pushing up daisies!");
+/* 1801: set default plugin state (i.e. new plugins on discovery) to never activate
+ * 0=disabled, 1=ask to activate, 2=active - you can override individual plugins ***/
+user_pref("plugin.default.state", 0);
+user_pref("plugin.defaultXpi.state", 0);
+/* 1802: enable click to play and set to 0 minutes ***/
+user_pref("plugins.click_to_play", true);
+user_pref("plugin.sessionPermissionNow.intervalInMinutes", 0);
+/* 1803: disable Flash plugin (Add-ons>Plugins)
+ * 0=deactivated, 1=ask, 2=enabled
+ * ESR52.x is the last branch to *fully* support NPAPI, FF52+ stable only supports Flash
+ * [NOTE] You can still override individual sites via site permissions
+ * [1] https://www.ghacks.net/2013/07/09/how-to-make-sure-that-a-firefox-plugin-never-activates-again/ ***/
+user_pref("plugin.state.flash", 0);
+/* 1805: disable scanning for plugins [WINDOWS]
+ * [1] http://kb.mozillazine.org/Plugin_scanning
+ * plid.all = whether to scan the directories specified in the Windows registry for PLIDs.
+ * Used to detect RealPlayer, Java, Antivirus etc, but since FF52 only covers Flash ***/
+user_pref("plugin.scan.plid.all", false);
+/* 1820: disable all GMP (Gecko Media Plugins) [SETUP]
+ * [1] https://wiki.mozilla.org/GeckoMediaPlugins ***/
+user_pref("media.gmp-provider.enabled", false);
+user_pref("media.gmp.trial-create.enabled", false);
+user_pref("media.gmp-manager.url", "data:text/plain,");
+user_pref("media.gmp-manager.url.override", "data:text/plain,"); // (hidden pref)
+user_pref("media.gmp-manager.updateEnabled", false); // disable local fallback (hidden pref)
+/* 1825: disable widevine CDM (Content Decryption Module) [SETUP] ***/
+user_pref("media.gmp-widevinecdm.visible", false);
+user_pref("media.gmp-widevinecdm.enabled", false);
+user_pref("media.gmp-widevinecdm.autoupdate", false);
+/* 1830: disable all DRM content (EME: Encryption Media Extension) [SETUP]
+ * [1] https://www.eff.org/deeplinks/2017/10/drms-dead-canary-how-we-just-lost-web-what-we-learned-it-and-what-we-need-do-next ***/
+user_pref("media.eme.enabled", false); // [SETTING] General>DRM Content>Play DRM-controlled content
+user_pref("browser.eme.ui.enabled", false); // hides "Play DRM-controlled content" checkbox [RESTART]
+/* 1840: disable the OpenH264 Video Codec by Cisco to "Never Activate"
+ * This is the bundled codec used for video chat in WebRTC ***/
+user_pref("media.gmp-gmpopenh264.enabled", false); // (hidden pref)
+user_pref("media.gmp-gmpopenh264.autoupdate", false);
+/*** 2000: MEDIA / CAMERA / MIC ***/
+user_pref("_user.js.parrot", "2000 syntax error: the parrot's snuffed it!");
+/* 2001: disable WebRTC (Web Real-Time Communication)
+ * [1] https://www.privacytools.io/#webrtc ***/
+user_pref("media.peerconnection.enabled", false);
+user_pref("media.peerconnection.use_document_iceservers", false);
+user_pref("media.peerconnection.video.enabled", false);
+user_pref("media.peerconnection.identity.enabled", false);
+user_pref("media.peerconnection.identity.timeout", 1);
+user_pref("media.peerconnection.turn.disable", true);
+user_pref("media.peerconnection.ice.tcp", false);
+user_pref("media.navigator.video.enabled", false); // video capability for WebRTC
+/* 2002: limit WebRTC IP leaks if using WebRTC
+ * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1189041,1297416
+ * [2] https://wiki.mozilla.org/Media/WebRTC/Privacy ***/
+user_pref("media.peerconnection.ice.default_address_only", true); // (FF42-FF50)
+user_pref("media.peerconnection.ice.no_host", true); // (FF51+)
+/* 2010: disable WebGL (Web Graphics Library), force bare minimum feature set if used & disable WebGL extensions
+ * [1] https://www.contextis.com/resources/blog/webgl-new-dimension-browser-exploitation/
+ * [2] https://security.stackexchange.com/questions/13799/is-webgl-a-security-concern ***/
+user_pref("webgl.disabled", true);
+user_pref("pdfjs.enableWebGL", false);
+user_pref("webgl.min_capability_mode", true);
+user_pref("webgl.disable-extensions", true);
+user_pref("webgl.disable-fail-if-major-performance-caveat", true);
+/* 2012: disable two more webgl preferences (FF51+) ***/
+user_pref("webgl.dxgl.enabled", false); // [WINDOWS]
+user_pref("webgl.enable-webgl2", false);
+/* 2022: disable screensharing ***/
+user_pref("media.getusermedia.screensharing.enabled", false);
+user_pref("media.getusermedia.browser.enabled", false);
+user_pref("media.getusermedia.audiocapture.enabled", false);
+/* 2024: set a default permission for Camera/Microphone (FF58+)
+ * 0=always ask (default), 1=allow, 2=block
+ * [SETTING] to add site exceptions: Page Info>Permissions>Use the Camera/Microphone
+ * [SETTING] to manage site exceptions: Options>Privacy & Security>Permissions>Camera/Microphone>Settings ***/
+ // user_pref("permissions.default.camera", 2);
+ // user_pref("permissions.default.microphone", 2);
+/* 2026: disable canvas capture stream (FF41+)
+ * [1] https://developer.mozilla.org/docs/Web/API/HTMLCanvasElement/captureStream ***/
+user_pref("canvas.capturestream.enabled", false);
+/* 2027: disable camera image capture (FF35+)
+ * [1] https://trac.torproject.org/projects/tor/ticket/16339 ***/
+user_pref("dom.imagecapture.enabled", false); // default: false
+/* 2028: disable offscreen canvas (FF44+)
+ * [1] https://developer.mozilla.org/docs/Web/API/OffscreenCanvas ***/
+user_pref("gfx.offscreencanvas.enabled", false); // default: false
+/* 2030: disable auto-play of HTML5 media
+ * [WARNING] This may break video playback on various sites ***/
+user_pref("media.autoplay.enabled", false);
+/* 2031: disable audio auto-play in non-active tabs (FF51+)
+ * [1] https://www.ghacks.net/2016/11/14/firefox-51-blocks-automatic-audio-playback-in-non-active-tabs/ ***/
+user_pref("media.block-autoplay-until-in-foreground", true);
+/*** 2200: WINDOW MEDDLING & LEAKS / POPUPS ***/
+user_pref("_user.js.parrot", "2200 syntax error: the parrot's 'istory!");
+/* 2201: prevent websites from disabling new window features
+ * [1] http://kb.mozillazine.org/Prevent_websites_from_disabling_new_window_features ***/
+user_pref("dom.disable_window_open_feature.close", true);
+user_pref("dom.disable_window_open_feature.location", true); // default: true
+user_pref("dom.disable_window_open_feature.menubar", true);
+user_pref("dom.disable_window_open_feature.minimizable", true);
+user_pref("dom.disable_window_open_feature.personalbar", true); // bookmarks toolbar
+user_pref("dom.disable_window_open_feature.resizable", true); // default: true
+user_pref("dom.disable_window_open_feature.status", true); // status bar - default: true
+user_pref("dom.disable_window_open_feature.titlebar", true);
+user_pref("dom.disable_window_open_feature.toolbar", true);
+/* 2202: prevent scripts moving and resizing open windows ***/
+user_pref("dom.disable_window_move_resize", true);
+/* 2203: open links targeting new windows in a new tab instead
+ * This stops malicious window sizes and some screen resolution leaks.
+ * You can still right-click a link and open in a new window.
+ * [TEST] https://people.torproject.org/~gk/misc/entire_desktop.html
+ * [1] https://trac.torproject.org/projects/tor/ticket/9881 ***/
+user_pref("browser.link.open_newwindow", 3);
+user_pref("browser.link.open_newwindow.restriction", 0);
+/* 2204: disable Fullscreen API to prevent screen-resolution leaks [SETUP]
+ * [NOTE] You can still manually toggle the browser's fullscreen state (F11),
+ * but this pref will disable embedded video/game fullscreen controls, e.g. youtube
+ * [TEST] https://developer.mozilla.org/samples/domref/fullscreen.html ***/
+//;user_pref("full-screen-api.enabled", false);
+/* 2210: block popup windows
+ * [SETTING] Privacy & Security>Permissions>Block pop-up windows ***/
+user_pref("dom.disable_open_during_load", true);
+/* 2211: set max popups from a single non-click event - default is 20! ***/
+user_pref("dom.popup_maximum", 3);
+/* 2212: limit events that can cause a popup
+ * default is "change click dblclick mouseup pointerup notificationclick reset submit touchend"
+ * [1] http://kb.mozillazine.org/Dom.popup_allowed_events ***/
+user_pref("dom.popup_allowed_events", "click dblclick");
+/*** 2300: WEB WORKERS [SETUP]
+ A worker is a JS "background task" running in a global context, i.e. it is different from
+ the current window. Workers can spawn new workers (must be the same origin & scheme),
+ including service and shared workers. Shared workers can be utilized by multiple scripts and
+ communicate between browsing contexts (windows/tabs/iframes) and can even control your cache.
+ [WARNING] Disabling "web workers" might break sites
+ [UPDATE] uMatrix 1.2.0+ allows a per-scope control for workers (2301-deprecated) and service workers (2302)
+ #Required reading [#] https://github.com/gorhill/uMatrix/releases/tag/1.2.0
+ [1] Web Workers: https://developer.mozilla.org/docs/Web/API/Web_Workers_API
+ [2] Worker: https://developer.mozilla.org/docs/Web/API/Worker
+ [3] Service Worker: https://developer.mozilla.org/docs/Web/API/Service_Worker_API
+ [4] SharedWorker: https://developer.mozilla.org/docs/Web/API/SharedWorker
+ [5] ChromeWorker: https://developer.mozilla.org/docs/Web/API/ChromeWorker
+ [6] Notifications: https://support.mozilla.org/questions/1165867#answer-981820
+user_pref("_user.js.parrot", "2300 syntax error: the parrot's off the twig!");
+/* 2302: disable service workers
+ * Service workers essentially act as proxy servers that sit between web apps, and the browser
+ * and network, are event driven, and can control the web page/site it is associated with,
+ * intercepting and modifying navigation and resource requests, and caching resources.
+ * [NOTE] Service worker APIs are hidden (in Firefox) and cannot be used when in PB mode.
+ * [NOTE] Service workers only run over HTTPS. Service Workers have no DOM access. ***/
+user_pref("dom.serviceWorkers.enabled", false);
+/* 2304: disable web notifications
+ * [1] https://developer.mozilla.org/docs/Web/API/Notifications_API ***/
+user_pref("dom.webnotifications.enabled", false); // (FF22+)
+user_pref("dom.webnotifications.serviceworker.enabled", false); // (FF44+)
+/* 2305: set a default permission for Notifications (see 2304) (FF58+)
+ * [SETTING] to add site exceptions: Page Info>Permissions>Receive Notifications
+ * [SETTING] to manage site exceptions: Options>Privacy & Security>Permissions>Notifications>Settings ***/
+ // user_pref("permissions.default.desktop-notification", 2); // 0=always ask (default), 1=allow, 2=block
+/* 2306: disable push notifications (FF44+)
+ * web apps can receive messages pushed to them from a server, whether or
+ * not the web app is in the foreground, or even currently loaded
+ * [1] https://developer.mozilla.org/docs/Web/API/Push_API ***/
+user_pref("dom.push.enabled", false);
+user_pref("dom.push.connection.enabled", false);
+user_pref("dom.push.serverURL", "");
+user_pref("dom.push.userAgentID", "");
+/*** 2400: DOM (DOCUMENT OBJECT MODEL) & JAVASCRIPT ***/
+user_pref("_user.js.parrot", "2400 syntax error: the parrot's kicked the bucket!");
+/* 2401: disable website control over browser right-click context menu
+ * [NOTE] Shift-Right-Click will always bring up the browser right-click context menu ***/
+ // user_pref("dom.event.contextmenu.enabled", false);
+/* 2402: disable website access to clipboard events/content
+ * [WARNING] This will break some sites functionality such as pasting into facebook, wordpress
+ * this applies to onCut, onCopy, onPaste events - i.e. you have to interact with
+ * the website for it to look at the clipboard
+ * [1] https://www.ghacks.net/2014/01/08/block-websites-reading-modifying-clipboard-contents-firefox/ ***/
+user_pref("dom.event.clipboardevents.enabled", false);
+/* 2403: disable clipboard commands (cut/copy) from "non-privileged" content (FF41+)
+ * this disables document.execCommand("cut"/"copy") to protect your clipboard
+ * [1] https://bugzilla.mozilla.org/1170911 ***/
+user_pref("dom.allow_cut_copy", false); // (hidden pref)
+/* 2404: disable "Confirm you want to leave" dialog on page close
+ * Does not prevent JS leaks of the page close event.
+ * [1] https://developer.mozilla.org/docs/Web/Events/beforeunload
+ * [2] https://support.mozilla.org/questions/1043508 ***/
+user_pref("dom.disable_beforeunload", true);
+/* 2414: disable shaking the screen ***/
+user_pref("dom.vibrator.enabled", false);
+/* 2420: disable asm.js (FF22+)
+ * [1] http://asmjs.org/
+ * [2] https://www.mozilla.org/security/advisories/mfsa2015-29/
+ * [3] https://www.mozilla.org/security/advisories/mfsa2015-50/
+ * [4] https://www.mozilla.org/security/advisories/mfsa2017-01/#CVE-2017-5375
+ * [5] https://www.mozilla.org/security/advisories/mfsa2017-05/#CVE-2017-5400
+ * [6] https://rh0dev.github.io/blog/2017/the-return-of-the-jit/ ***/
+//;user_pref("javascript.options.asmjs", false);
+/* 2421: disable Ion and baseline JIT to help harden JS against exploits
+ * [WARNING] Causes the odd site issue and there is also a performance loss
+ * [1] https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0817 ***/
+ // user_pref("javascript.options.ion", false);
+ // user_pref("javascript.options.baselinejit", false);
+/* 2422: disable WebAssembly for now (FF52+)
+ * [1] https://developer.mozilla.org/docs/WebAssembly ***/
+user_pref("javascript.options.wasm", false);
+/* 2426: disable Intersection Observer API (FF53+)
+ * Almost a year to complete, three versions late to stable (as default false),
+ * number #1 cause of crashes in nightly numerous times, and is (primarily) an
+ * ad network API for "ad viewability checks" down to a pixel level
+ * [1] https://developer.mozilla.org/docs/Web/API/Intersection_Observer_API
+ * [2] https://w3c.github.io/IntersectionObserver/
+ * [3] https://bugzilla.mozilla.org/1243846 ***/
+user_pref("dom.IntersectionObserver.enabled", false);
+/* 2427: disable Shared Memory (Spectre mitigation)
+ * [1] https://github.com/tc39/ecmascript_sharedmem/blob/master/TUTORIAL.md
+ * [2] https://blog.mozilla.org/security/2018/01/03/mitigations-landing-new-class-timing-attack/ ***/
+user_pref("javascript.options.shared_memory", false);
+/*** 2500: HARDWARE FINGERPRINTING ***/
+user_pref("_user.js.parrot", "2500 syntax error: the parrot's shuffled off 'is mortal coil!");
+/* 2502: disable Battery Status API
+ * Initially a Linux issue (high precision readout) that was fixed.
+ * However, it is still another metric for fingerprinting, used to raise entropy.
+ * e.g. do you have a battery or not, current charging status, charge level, times remaining etc
+ * [NOTE] From FF52+ Battery Status API is only available in chrome/privileged code. see [1]
+ * [1] https://bugzilla.mozilla.org/1313580 ***/
+ // user_pref("dom.battery.enabled", false);
+/* 2504: disable virtual reality devices
+ * [WARNING] [SETUP] Optional protection depending on your connected devices
+ * [1] https://developer.mozilla.org/docs/Web/API/WebVR_API ***/
+ // user_pref("dom.vr.enabled", false);
+/* 2505: disable media device enumeration (FF29+)
+ * [NOTE] media.peerconnection.enabled should also be set to false (see 2001)
+ * [1] https://wiki.mozilla.org/Media/getUserMedia
+ * [2] https://developer.mozilla.org/docs/Web/API/MediaDevices/enumerateDevices ***/
+user_pref("media.navigator.enabled", false);
+/* 2508: disable hardware acceleration to reduce graphics fingerprinting
+ * [SETTING] General>Performance>Custom>Use hardware acceleration when available
+ * [WARNING] [SETUP] Affects text rendering (fonts will look different), impacts video performance,
+ * and parts of Quantum that utilize the GPU will also be affected as they are rolled out
+ * [1] https://wiki.mozilla.org/Platform/GFX/HardwareAcceleration ***/
+ // user_pref("gfx.direct2d.disabled", true); // [WINDOWS]
+user_pref("layers.acceleration.disabled", true);
+/* 2510: disable Web Audio API (FF51+)
+ * [1] https://bugzilla.mozilla.org/1288359 ***/
+//;user_pref("dom.webaudio.enabled", false);
+/* 2516: disable PointerEvents
+ * [1] https://developer.mozilla.org/en-US/docs/Web/API/PointerEvent ***/
+user_pref("dom.w3c_pointer_events.enabled", false);
+/*** 2600: MISCELLANEOUS ***/
+user_pref("_user.js.parrot", "2600 syntax error: the parrot's run down the curtain!");
+/* 2601: prevent accessibility services from accessing your browser [RESTART]
+ * [SETTING] Privacy & Security>Permissions>Prevent accessibility services from accessing your browser
+ * [1] https://support.mozilla.org/kb/accessibility-services ***/
+user_pref("accessibility.force_disabled", 1);
+/* 2602: disable sending additional analytics to web servers
+ * [1] https://developer.mozilla.org/docs/Web/API/Navigator/sendBeacon ***/
+user_pref("beacon.enabled", false);
+/* 2603: remove temp files opened with an external application
+ * [1] https://bugzilla.mozilla.org/302433 ***/
+user_pref("browser.helperApps.deleteTempFileOnExit", true);
+/* 2604: disable page thumbnail collection
+ * look in profile/thumbnails directory - you may want to clean that out ***/
+user_pref("browser.pagethumbnails.capturing_disabled", true); // (hidden pref)
+/* 2605: block web content in file processes (FF55+)
+ * [WARNING] [SETUP] You may want to disable this for corporate or developer environments
+ * [1] https://bugzilla.mozilla.org/1343184 ***/
+user_pref("browser.tabs.remote.allowLinkedWebInFileUriProcess", false);
+/* 2606: disable UITour backend so there is no chance that a remote page can use it ***/
+user_pref("browser.uitour.enabled", false);
+user_pref("browser.uitour.url", "");
+/* 2607: disable various developer tools in browser context
+ * [SETTING] Devtools>Advanced Settings>Enable browser chrome and add-on debugging toolboxes
+ * [1] https://github.com/pyllyukko/user.js/issues/179#issuecomment-246468676 ***/
+user_pref("devtools.chrome.enabled", false);
+/* 2608: disable WebIDE to prevent remote debugging and extension downloads
+ * [1] https://trac.torproject.org/projects/tor/ticket/16222 ***/
+user_pref("devtools.webide.autoinstallADBHelper", false);
+user_pref("devtools.debugger.remote-enabled", false);
+user_pref("devtools.webide.enabled", false);
+/* 2609: disable MathML (Mathematical Markup Language) (FF51+)
+ * [TEST] http://browserspy.dk/mathml.php
+ * [1] https://bugzilla.mozilla.org/1173199 ***/
+user_pref("mathml.disabled", true);
+/* 2610: disable in-content SVG (Scalable Vector Graphics) (FF53+)
+ * [WARNING] Expect breakage incl. youtube player controls. Best left for a "hardened" profile.
+ * [1] https://bugzilla.mozilla.org/1216893 ***/
+ // user_pref("svg.disabled", true);
+/* 2611: disable middle mouse click opening links from clipboard
+ * [1] https://trac.torproject.org/projects/tor/ticket/10089
+ * [2] http://kb.mozillazine.org/Middlemouse.contentLoadURL ***/
+user_pref("middlemouse.contentLoadURL", false);
+/* 2614: limit HTTP redirects (this does not control redirects with HTML meta tags or JS)
+ * [WARNING] A low setting of 5 or under will probably break some sites (e.g. gmail logins)
+ * To control HTML Meta tag and JS redirects, use an extension. Default is 20 ***/
+user_pref("network.http.redirection-limit", 10);
+/* 2615: disable websites overriding Firefox's keyboard shortcuts (FF58+)
+ * [SETTING] to add site exceptions: Page Info>Permissions>Override Keyboard Shortcuts
+ * [NOTE] At the time of writing, causes issues with delete and backspace keys ***/
+ // user_pref("permissions.default.shortcuts", 2); // 0 (default) or 1=allow, 2=block
+/* 2616: remove special permissions for certain mozilla domains (FF35+)
+ * [1] resource://app/defaults/permissions ***/
+user_pref("permissions.manager.defaultsUrl", "");
+/* 2617: remove webchannel whitelist ***/
+user_pref("webchannel.allowObject.urlWhitelist", "");
+/* 2618: disable exposure of system colors to CSS or canvas (FF44+)
+ * [NOTE] see second listed bug: may cause black on black for elements with undefined colors
+ * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=232227,1330876 ***/
+user_pref("ui.use_standins_for_native_colors", true); // (hidden pref)
+/* 2619: enforce Punycode for Internationalized Domain Names to eliminate possible spoofing
+ * Firefox has *some* protections, but it is better to be safe than sorry. The downside: it will also
+ * display legitimate IDN's punycoded, which might be undesirable for users of non-latin alphabets
+ * [TEST] https://www.xn--80ak6aa92e.com/ (www.apple.com)
+ * [1] https://wiki.mozilla.org/IDN_Display_Algorithm
+ * [2] https://en.wikipedia.org/wiki/IDN_homograph_attack
+ * [3] CVE-2017-5383: https://www.mozilla.org/security/advisories/mfsa2017-02/
+ * [4] https://www.xudongz.com/blog/2017/idn-phishing/ ***/
+user_pref("network.IDN_show_punycode", true);
+/* 2620: enable Firefox's built-in PDF reader [SETUP]
+ * [SETTING] General>Applications>Portable Document Format (PDF)
+ * This setting controls if the option "Display in Firefox" in the above setting is available
+ * and by effect controls whether PDFs are handled in-browser or externally ("Ask" or "Open With")
+ * PROS: pdfjs is lightweight, open source, and as secure/vetted as any pdf reader out there (more than most)
+ * Exploits are rare (1 serious case in 4 yrs), treated seriously and patched quickly.
+ * It doesn't break "state separation" of browser content (by not sharing with OS, independent apps).
+ * It maintains disk avoidance and application data isolation. It's convenient. You can still save to disk.
+ * CONS: You may prefer a different pdf reader for security reasons
+ * CAVEAT: JS can still force a pdf to open in-browser by bundling its own code (rare) ***/
+user_pref("pdfjs.disabled", false);
+/* 2650: discourage downloading to desktop (0=desktop 1=downloads 2=last used)
+ * [SETTING] To set your default "downloads": General>Downloads>Save files to ***/
+user_pref("browser.download.folderList", 2);
+/* 2651: enforce user interaction for security by always asking the user where to download
+ * [SETTING] General>Downloads>Always ask you where to save files ***/
+user_pref("browser.download.useDownloadDir", false);
+/* 2652: disable adding downloads to the system's "recent documents" list ***/
+user_pref("browser.download.manager.addToRecentDocs", false);
+/* 2653: disable hiding mime types (Options>General>Applications) not associated with a plugin ***/
+user_pref("browser.download.hide_plugins_without_extensions", false);
+/* 2654: disable "open with" in download dialog (FF50+)
+ * This is very useful to enable when the browser is sandboxed (e.g. via AppArmor)
+ * in such a way that it is forbidden to run external applications.
+ * [SETUP] This may interfere with some users' workflow or methods
+ * [1] https://bugzilla.mozilla.org/1281959 ***/
+user_pref("browser.download.forbid_open_with", true);
+/* 2660: lock down allowed extension directories
+ * [WARNING] This will break extensions that do not use the default XPI directories
+ * [1] https://mike.kaply.com/2012/02/21/understanding-add-on-scopes/
+ * [1] archived: https://archive.is/DYjAM ***/
+user_pref("extensions.enabledScopes", 1); // (hidden pref)
+user_pref("extensions.autoDisableScopes", 15);
+/* 2661: clear localStorage and UUID when an extension is uninstalled
+ * [NOTE] Both preferences must be the same
+ * [1] https://developer.mozilla.org/Add-ons/WebExtensions/API/storage/local
+ * [2] https://bugzilla.mozilla.org/1213990 ***/
+user_pref("extensions.webextensions.keepStorageOnUninstall", false);
+user_pref("extensions.webextensions.keepUuidOnUninstall", false);
+/* 2662: disable webextension restrictions on certain mozilla domains (also see 4503) (FF60+)
+ * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1384330,1406795,1415644,1453988 ***/
+ // user_pref("extensions.webextensions.restrictedDomains", "");
+/* 2663: enable warning when websites try to install add-ons
+ * [SETTING] Privacy & Security>Permissions>Warn you when websites try to install add-ons ***/
+user_pref("xpinstall.whitelist.required", true); // default: true
+/* 2680: enable CSP (Content Security Policy)
+ * [1] https://developer.mozilla.org/docs/Web/HTTP/CSP ***/
+user_pref("security.csp.enable", true); // default: true
+/* 2681: disable CSP violation events (FF59+)
+ * [1] https://developer.mozilla.org/docs/Web/API/SecurityPolicyViolationEvent ***/
+user_pref("security.csp.enable_violation_events", false);
+/* 2682: enable CSP 1.1 experimental hash-source directive (FF29+)
+ * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=855326,883975 ***/
+user_pref("security.csp.experimentalEnabled", true);
+/* 2683: block top level window data: URIs (FF56+)
+ * [1] https://bugzilla.mozilla.org/1331351
+ * [2] https://www.wordfence.com/blog/2017/01/gmail-phishing-data-uri/
+ * [3] https://www.fxsitecompat.com/en-CA/docs/2017/data-url-navigations-on-top-level-window-will-be-blocked/ ***/
+user_pref("security.data_uri.block_toplevel_data_uri_navigations", true);
+/* 2684: enforce a security delay on some confirmation dialogs such as install, open/save
+ * [1] http://kb.mozillazine.org/Disable_extension_install_delay_-_Firefox
+ * [2] https://www.squarefree.com/2004/07/01/race-conditions-in-security-dialogs/ ***/
+user_pref("security.dialog_enable_delay", 700); // default: 1000 (milliseconds)
+/*** 2700: PERSISTENT STORAGE
+ Data SET by websites including
+ cookies : profile\cookies.sqlite
+ localStorage : profile\webappsstore.sqlite
+ indexedDB : profile\storage\default
+ appCache : profile\OfflineCache
+user_pref("_user.js.parrot", "2700 syntax error: the parrot's joined the bleedin' choir invisible!");
+/* 2701: disable 3rd-party cookies and site-data [SETUP]
+ * You can set exceptions under site permissions or use an extension
+ * 0=allow all 1=allow same host 2=disallow all 3=allow 3rd party if it already set a cookie
+ * [SETTING] Privacy & Security>History>Custom Settings>Accept cookies from sites
+ * [NOTE] Blocking 3rd party controls 3rd party access to localStorage, IndexedDB, Cache API and Service Worker Cache.
+ * Blocking 1st party controls access to localStorage and IndexedDB (note: Service Workers can still use IndexedDB).
+ * [1] https://www.fxsitecompat.com/en-CA/docs/2015/web-storage-indexeddb-cache-api-now-obey-third-party-cookies-preference/ ***/
+user_pref("network.cookie.cookieBehavior", 1);
+/* 2702: set third-party cookies (i.e ALL) (if enabled, see above pref) to session-only
+ and (FF58+) set third-party non-secure (i.e HTTP) cookies to session-only
+ [NOTE] .sessionOnly overrides .nonsecureSessionOnly except when .sessionOnly=false and
+ .nonsecureSessionOnly=true. This allows you to keep HTTPS cookies, but session-only HTTP ones
+ * [1] https://feeding.cloud.geek.nz/posts/tweaking-cookies-for-privacy-in-firefox/
+ * [2] http://kb.mozillazine.org/Network.cookie.thirdparty.sessionOnly ***/
+//;user_pref("network.cookie.thirdparty.sessionOnly", true);
+//;user_pref("network.cookie.thirdparty.nonsecureSessionOnly", true); // (FF58+)
+/* 2703: set cookie lifetime policy
+ * 0=until they expire (default), 2=until you close Firefox, 3=for n days (see next pref)
+ * [SETTING] Privacy & Security>History>Custom Settings>Accept cookies from sites>Keep until ***/
+ // user_pref("network.cookie.lifetimePolicy", 0);
+/* 2704: set cookie lifetime in days (see above pref) - default is 90 days ***/
+ // user_pref("network.cookie.lifetime.days", 90);
+/* 2705: disable HTTP sites setting cookies with the "secure" directive (FF52+)
+ * [1] https://developer.mozilla.org/Firefox/Releases/52#HTTP ***/
+user_pref("network.cookie.leave-secure-alone", true); // default: true
+/* 2706: enable support for same-site cookies (FF60+)
+ * [1] https://bugzilla.mozilla.org/795346
+ * [2] https://blog.mozilla.org/security/2018/04/24/same-site-cookies-in-firefox-60/
+ * [3] https://www.sjoerdlangkemper.nl/2016/04/14/preventing-csrf-with-samesite-cookie-attribute/ ***/
+ // user_pref("network.cookie.same-site.enabled", true); // default: true
+/* 2710: disable DOM (Document Object Model) Storage
+ * [WARNING] This will break a LOT of sites' functionality.
+ * You are better off using an extension for more granular control ***/
+ // user_pref("dom.storage.enabled", false);
+/* 2720: enforce IndexedDB (IDB) as enabled
+ * IDB is required for extensions and Firefox internals (even before FF63 in [1])
+ * To control *website* IDB data, control allowing cookies and service workers, or use
+ * Temporary Containers. To mitigate *website* IDB, FPI helps (4001), and/or sanitize
+ * on close (Offline Website Data, see 2800) or on-demand (Ctrl-Shift-Del), or automatically
+ * via an extenion. Note that IDB currently cannot be sanitized by host.
+ * [1] https://blog.mozilla.org/addons/2018/08/03/new-backend-for-storage-local-api/ ***/
+user_pref("dom.indexedDB.enabled", true); // default: true
+/* 2730: disable offline cache
+ * [NOTE] For FF51-FF60 (ESR not included), this is required 'true' for Storage API (2750) ***/
+user_pref("browser.cache.offline.enable", false);
+/* 2730b: disable offline cache on insecure sites (FF60+)
+ * [1] https://blog.mozilla.org/security/2018/02/12/restricting-appcache-secure-contexts/ ***/
+user_pref("browser.cache.offline.insecure.enable", false);
+/* 2731: enforce websites to ask to store data for offline use
+ * [1] https://support.mozilla.org/questions/1098540
+ * [2] https://bugzilla.mozilla.org/959985 ***/
+user_pref("offline-apps.allow_by_default", false);
+/* 2740: disable service workers cache and cache storage
+ * [1] https://w3c.github.io/ServiceWorker/#privacy ***/
+user_pref("dom.caches.enabled", false);
+/* 2750: disable Storage API (FF51+)
+ * The API gives sites the ability to find out how much space they can use, how much
+ * they are already using, and even control whether or not they need to be alerted
+ * before the user agent disposes of site data in order to make room for other things.
+ * [NOTE] For FF51-FF60 (ESR not included), if Storage API is enabled, then Offline Cache (2730) must be also be enabled
+ * [1] https://developer.mozilla.org/docs/Web/API/StorageManager
+ * [2] https://developer.mozilla.org/docs/Web/API/Storage_API
+ * [3] https://blog.mozilla.org/l10n/2017/03/07/firefox-l10n-report-aurora-54/ ***/
+ // user_pref("dom.storageManager.enabled", false);
+/*** 2800: SHUTDOWN [SETUP]
+ You should set the values to what suits you best.
+ - "Offline Website Data" includes appCache (2730), localStorage (2710),
+ Service Worker cache (2740), and QuotaManager (IndexedDB (2720), asm-cache)
+ - In both 2803 + 2804, the 'download' and 'history' prefs are combined in the
+ Firefox interface as "Browsing & Download History" and their values will be synced
+user_pref("_user.js.parrot", "2800 syntax error: the parrot's bleedin' demised!");
+/* 2802: enable Firefox to clear history items on shutdown
+ * [SETTING] Privacy & Security>History>Clear history when Firefox closes ***/
+//;user_pref("privacy.sanitize.sanitizeOnShutdown", true);
+/* 2803: set what history items to clear on shutdown
+ * [SETTING] Privacy & Security>History>Clear history when Firefox closes>Settings
+ * [NOTE] If 'history' is true, downloads will also be cleared regardless of the value
+ * but if 'history' is false, downloads can still be cleared independently
+ * However, this may not always be the case. The interface combines and syncs these
+ * prefs when set from there, and the sanitize code may change at any time ***/
+//;user_pref("privacy.clearOnShutdown.cache", true);
+//;user_pref("privacy.clearOnShutdown.cookies", true);
+//;user_pref("privacy.clearOnShutdown.downloads", true); // see note above
+//;user_pref("privacy.clearOnShutdown.formdata", true); // Form & Search History
+//;user_pref("privacy.clearOnShutdown.history", true); // Browsing & Download History
+//;user_pref("privacy.clearOnShutdown.offlineApps", true); // Offline Website Data
+//;user_pref("privacy.clearOnShutdown.sessions", true); // Active Logins
+user_pref("privacy.clearOnShutdown.siteSettings", false); // Site Preferences
+/* 2804: reset default history items to clear with Ctrl-Shift-Del (to match above)
+ * This dialog can also be accessed from the menu History>Clear Recent History
+ * Firefox remembers your last choices. This will reset them when you start Firefox.
+ * [NOTE] Regardless of what you set privacy.cpd.downloads to, as soon as the dialog
+ * for "Clear Recent History" is opened, it is synced to the same as 'history' ***/
+//;user_pref("privacy.cpd.cache", true);
+//;user_pref("privacy.cpd.cookies", true);
+ // user_pref("privacy.cpd.downloads", true); // not used, see note above
+//;user_pref("privacy.cpd.formdata", true); // Form & Search History
+//;user_pref("privacy.cpd.history", true); // Browsing & Download History
+//;user_pref("privacy.cpd.offlineApps", true); // Offline Website Data
+user_pref("privacy.cpd.passwords", false); // this is not listed
+//;user_pref("privacy.cpd.sessions", true); // Active Logins
+user_pref("privacy.cpd.siteSettings", false); // Site Preferences
+/* 2805: privacy.*.openWindows (clear session restore data) (FF34+)
+ * [NOTE] There is a years-old bug that these cause two windows when Firefox restarts.
+ * You do not need these anyway if session restore is disabled (see 1020) ***/
+ // user_pref("privacy.clearOnShutdown.openWindows", true);
+ // user_pref("privacy.cpd.openWindows", true);
+/* 2806: reset default 'Time range to clear' for 'Clear Recent History' (see 2804)
+ * Firefox remembers your last choice. This will reset the value when you start Firefox.
+ * 0=everything, 1=last hour, 2=last two hours, 3=last four hours,
+ * 4=today, 5=last five minutes, 6=last twenty-four hours
+ * [NOTE] The values 5 + 6 are not listed in the dropdown, which will display a
+ * blank value if they are used, but they do work as advertised ***/
+user_pref("privacy.sanitize.timeSpan", 0);
+/*** 4000: FIRST PARTY ISOLATION (FPI)
+ ** 1278037 - isolate indexedDB (FF51+)
+ ** 1277803 - isolate favicons (FF52+)
+ ** 1264562 - isolate OCSP cache (FF52+)
+ ** 1268726 - isolate Shared Workers (FF52+)
+ ** 1316283 - isolate SSL session cache (FF52+)
+ ** 1317927 - isolate media cache (FF53+)
+ ** 1323644 - isolate HSTS and HPKP (FF54+)
+ ** 1334690 - isolate HTTP Alternative Services (FF54+)
+ ** 1334693 - isolate SPDY/HTTP2 (FF55+)
+ ** 1337893 - isolate DNS cache (FF55+)
+ ** 1344170 - isolate blob: URI (FF55+)
+ ** 1300671 - isolate data:, about: URLs (FF55+)
+ ** 1473247 - isolate IP addresses (FF63+)
+ NOTE: FPI has some issues depending on your Firefox release
+ ** 1418931 - [fixed in FF58+] IndexedDB (Offline Website Data) with FPI Origin Attributes
+ are not removed with "Clear All/Recent History" or "On Close"
+ ** 1381197 - [fixed in FF59+] extensions cannot control cookies with FPI Origin Attributes
+user_pref("_user.js.parrot", "4000 syntax error: the parrot's pegged out");
+/* 4001: enable First Party Isolation (FF51+)
+ * [WARNING] May break cross-domain logins and site functionality until perfected
+ * [1] https://bugzilla.mozilla.org/1260931 ***/
+user_pref("privacy.firstparty.isolate", true);
+/* 4002: enforce FPI restriction for window.opener (FF54+)
+ * [NOTE] Setting this to false may reduce the breakage in 4001
+ * [1] https://bugzilla.mozilla.org/1319773#c22 ***/
+user_pref("privacy.firstparty.isolate.restrict_opener_access", true);
+/*** 4500: privacy.resistFingerprinting (RFP)
+ This master switch will be used for a wide range of items, many of which will
+ **override** existing prefs from FF55+, often providing a **better** solution
+ IMPORTANT: As existing prefs become redundant, and some of them WILL interfere
+ with how RFP works, they will be moved to section 4600 and made inactive
+ ** 418986 - limit window.screen & CSS media queries leaking identifiable info (FF41+)
+ [POC] http://ip-check.info/?lang=en (screen, usable screen, and browser window will match)
+ [NOTE] Does not cover everything yet - https://bugzilla.mozilla.org/1216800
+ [NOTE] This will probably make your values pretty unique until you resize or snap the
+ inner window width + height into standard/common resolutions (such as 1366x768)
+ To set a size, open a XUL (chrome) page (such as about:config) which is at 100% zoom, hit
+ Shift+F4 to open the scratchpad, type window.resizeTo(1366,768), hit Ctrl+R to run. Test
+ your window size, do some math, resize to allow for all the non inner window elements
+ [TEST] http://browserspy.dk/screen.php
+ ** 1281949 - spoof screen orientation (FF50+)
+ ** 1281963 - hide the contents of navigator.plugins and navigator.mimeTypes (FF50+)
+ FF53: Fixes GetSupportedNames in nsMimeTypeArray and nsPluginArray (1324044)
+ ** 1330890 - spoof timezone as UTC 0 (FF55+)
+ FF58: Date.toLocaleFormat deprecated (818634)
+ FF60: Date.toLocaleDateString and Intl.DateTimeFormat fixed (1409973)
+ ** 1360039 - spoof navigator.hardwareConcurrency as 2 (see 4601) (FF55+)
+ This spoof *shouldn't* affect core chrome/Firefox performance
+ ** 1217238 - reduce precision of time exposed by javascript (FF55+)
+ ** 1369303 - spoof/disable performance API (see 2410-deprecated, 4602, 4603) (FF56+)
+ ** 1333651 & 1383495 & 1396468 - spoof Navigator API (see section 4700) (FF56+)
+ FF56: The version number will be rounded down to the nearest multiple of 10
+ FF57: The version number will match current ESR (1393283, 1418672, 1418162)
+ FF59: The OS will be reported as Windows, OSX, Android, or Linux (to reduce breakage) (1404608)
+ ** 1369319 - disable device sensor API (see 4604) (FF56+)
+ ** 1369357 - disable site specific zoom (see 4605) (FF56+)
+ ** 1337161 - hide gamepads from content (see 4606) (FF56+)
+ ** 1372072 - spoof network information API as "unknown" (see 4607) (FF56+)
+ ** 1333641 - reduce fingerprinting in WebSpeech API (see 4608) (FF56+)
+ ** 1372069 & 1403813 & 1441295 - block geolocation requests (same as denying a site permission) (see 0201, 0211) (FF56-62)
+ ** 1369309 - spoof media statistics (see 4610) (FF57+)
+ ** 1382499 - reduce screen co-ordinate fingerprinting in Touch API (see 4611) (FF57+)
+ ** 1217290 & 1409677 - enable fingerprinting resistance for WebGL (see 2010-12) (FF57+)
+ ** 1382545 - reduce fingerprinting in Animation API (FF57+)
+ ** 1354633 - limit MediaError.message to a whitelist (FF57+)
+ ** 1382533 - enable fingerprinting resistance for Presentation API (FF57+)
+ This blocks exposure of local IP Addresses via mDNS (Multicast DNS)
+ ** 967895 - enable site permission prompt before allowing canvas data extraction (FF58+)
+ FF59: Added to site permissions panel (1413780) Only prompt when triggered by user input (1376865)
+ ** 1372073 - spoof/block fingerprinting in MediaDevices API (see 4612) (FF59+)
+ ** 1039069 - warn when language prefs are set to non en-US (see 0207, 0208) (FF59+)
+ ** 1222285 & 1433592 - spoof keyboard events and suppress keyboard modifier events (FF59+)
+ Spoofing mimics the content language of the document. Currently it only supports en-US.
+ Modifier events suppressed are SHIFT and both ALT keys. Chrome is not affected.
+ FF60: Fix keydown/keyup events (1438795)
+ ** 1337157 - disable WebGL debug renderer info (see 4613) (FF60+)
+ ** 1459089 - disable OS locale in HTTP Accept-Language headers [ANDROID] (FF62+)
+user_pref("_user.js.parrot", "4500 syntax error: the parrot's popped 'is clogs");
+/* 4501: enable privacy.resistFingerprinting (FF41+)
+ * [1] https://bugzilla.mozilla.org/418986 ***/
+user_pref("privacy.resistFingerprinting", true); // (hidden pref) (not hidden FF55+)
+/* 4502: set new window sizes to round to hundreds (FF55+) [SETUP]
+ * [NOTE] Width will round down to multiples of 200s and height to 100s, to fit your screen.
+ * The override values are a starting point to round from if you want some control
+ * [1] https://bugzilla.mozilla.org/1330882
+ * [2] https://hardware.metrics.mozilla.com/ ***/
+ // user_pref("privacy.window.maxInnerWidth", 1600); // (hidden pref)
+ // user_pref("privacy.window.maxInnerHeight", 900); // (hidden pref)
+/* 4503: disable mozAddonManager Web API (FF57+)
+ * [NOTE] As a side-effect in FF57-59 this allowed extensions to work on AMO. In FF60+ you also need
+ * to sanitize or clear extensions.webextensions.restrictedDomains (see 2662) to keep that side-effect
+ * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1384330,1406795,1415644,1453988 ***/
+user_pref("privacy.resistFingerprinting.block_mozAddonManager", true); // (hidden pref)
+/* 4504: disable showing about:blank as soon as possible during startup (FF60+)
+ * When default true (FF62+) this no longer masks the RFP resizing activity ***/
+user_pref("browser.startup.blankWindow", false);
+/*** 4600: RFP (4500) ALTERNATIVES [SETUP]
+ * IF you DO use RFP (see 4500) then you DO NOT need these redundant prefs. In fact,
+ some even cause RFP to not behave as you would expect and alter your fingerprint.
+ Make sure they are RESET in about:config as per your Firefox version
+ * IF you DO NOT use RFP or are on ESR... then turn on each ESR section below
+user_pref("_user.js.parrot", "4600 syntax error: the parrot's crossed the Jordan");
+/* [NOTE] ESR52.x and non-RFP users replace the * with a slash on this line to enable these
+// 4601: [2514] spoof (or limit?) number of CPU cores (FF48+)
+ // [WARNING] *may* affect core chrome/Firefox performance, will affect content.
+ // [1] https://bugzilla.mozilla.org/1008453
+ // [2] https://trac.torproject.org/projects/tor/ticket/21675
+ // [3] https://trac.torproject.org/projects/tor/ticket/22127
+ // [4] https://html.spec.whatwg.org/multipage/workers.html#navigator.hardwareconcurrency
+ // user_pref("dom.maxHardwareConcurrency", 2);
+// 4602: [2411] disable resource/navigation timing
+user_pref("dom.enable_resource_timing", false);
+// 4603: [2412] disable timing attacks
+ // [1] https://wiki.mozilla.org/Security/Reviews/Firefox/NavigationTimingAPI
+user_pref("dom.enable_performance", false);
+// 4604: [2512] disable device sensor API
+ // [WARNING] [SETUP] Optional protection depending on your device
+ // [1] https://trac.torproject.org/projects/tor/ticket/15758
+ // [2] https://blog.lukaszolejnik.com/stealing-sensitive-browser-data-with-the-w3c-ambient-light-sensor-api/
+ // [3] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1357733,1292751
+ // user_pref("device.sensors.enabled", false);
+// 4605: [2515] disable site specific zoom
+ // Zoom levels affect screen res and are highly fingerprintable. This does not stop you using
+ // zoom, it will just not use/remember any site specific settings. Zoom levels on new tabs
+ // and new windows are reset to default and only the current tab retains the current zoom
+user_pref("browser.zoom.siteSpecific", false);
+// 4606: [2501] disable gamepad API - USB device ID enumeration
+ // [WARNING] [SETUP] Optional protection depending on your connected devices
+ // [1] https://trac.torproject.org/projects/tor/ticket/13023
+ // user_pref("dom.gamepad.enabled", false);
+// 4607: [2503] disable giving away network info (FF31+)
+ // e.g. bluetooth, cellular, ethernet, wifi, wimax, other, mixed, unknown, none
+ // [1] https://developer.mozilla.org/docs/Web/API/Network_Information_API
+ // [2] https://wicg.github.io/netinfo/
+ // [3] https://bugzilla.mozilla.org/960426
+user_pref("dom.netinfo.enabled", false);
+// 4608: [2021] disable the SpeechSynthesis (Text-to-Speech) part of the Web Speech API
+ // [1] https://developer.mozilla.org/docs/Web/API/Web_Speech_API
+ // [2] https://developer.mozilla.org/docs/Web/API/SpeechSynthesis
+ // [3] https://wiki.mozilla.org/HTML5_Speech_API
+user_pref("media.webspeech.synth.enabled", false);
+// 4610: [2506] disable video statistics - JS performance fingerprinting (FF25+)
+ // [1] https://trac.torproject.org/projects/tor/ticket/15757
+ // [2] https://bugzilla.mozilla.org/654550
+user_pref("media.video_stats.enabled", false);
+// 4611: [2509] disable touch events
+ // fingerprinting attack vector - leaks screen res & actual screen coordinates
+ // 0=disabled, 1=enabled, 2=autodetect
+ // [WARNING] [SETUP] Optional protection depending on your device
+ // [1] https://developer.mozilla.org/docs/Web/API/Touch_events
+ // [2] https://trac.torproject.org/projects/tor/ticket/10286
+ // user_pref("dom.w3c_touch_events.enabled", 0);
+// 4612: [2511] disable MediaDevices change detection (FF51+)
+ // [1] https://developer.mozilla.org/docs/Web/Events/devicechange
+ // [2] https://developer.mozilla.org/docs/Web/API/MediaDevices/ondevicechange
+user_pref("media.ondevicechange.enabled", false);
+// 4613: [2011] disable WebGL debug info being available to websites
+ // [1] https://bugzilla.mozilla.org/1171228
+ // [2] https://developer.mozilla.org/docs/Web/API/WEBGL_debug_renderer_info
+user_pref("webgl.enable-debug-renderer-info", false);
+/*** 4700: RFP (4500) ALTERNATIVES - NAVIGATOR / USER AGENT (UA) SPOOFING
+ This is FYI ONLY. These prefs are INSUFFICIENT(a) on their own, you need
+ to use RFP (4500) or an extension, in which case they become POINTLESS.
+ (a) Many of the components that make up your UA can be derived by other means.
+ And when those values differ, you provide more bits and raise entropy.
+ Examples of leaks include navigator objects, date locale/formats, iframes,
+ headers, tcp/ip attributes, feature detection, and **many** more.
+ ALL values below intentionally left blank - use RFP, or get a vetted, tested
+ extension and mimic RFP values to *lower* entropy, or randomize to *raise* it
+user_pref("_user.js.parrot", "4700 syntax error: the parrot's taken 'is last bow");
+/* 4701: navigator.userAgent ***/
+ // user_pref("general.useragent.override", ""); // (hidden pref)
+/* 4702: navigator.buildID (
+ * reveals build time down to the second
+ * [1] https://bugzilla.mozilla.org/583181 ***/
+ // user_pref("general.buildID.override", ""); // (hidden pref)
+/* 4703: navigator.appName ***/
+ // user_pref("general.appname.override", ""); // (hidden pref)
+/* 4704: navigator.appVersion ***/
+ // user_pref("general.appversion.override", ""); // (hidden pref)
+/* 4705: navigator.platform ***/
+ // user_pref("general.platform.override", ""); // (hidden pref)
+/* 4706: navigator.oscpu ***/
+ // user_pref("general.oscpu.override", ""); // (hidden pref)
+/*** 5000: PERSONAL [SETUP]
+ Non-project related but useful. If any of these interest you, add them to your overrides ***/
+user_pref("_user.js.parrot", "5000 syntax error: this is an ex-parrot!");
+/* WELCOME & WHAT's NEW NOTICES ***/
+ // user_pref("browser.startup.homepage_override.mstone", "ignore"); // master switch
+ // user_pref("startup.homepage_welcome_url", "");
+ // user_pref("startup.homepage_welcome_url.additional", "");
+ // user_pref("startup.homepage_override_url", ""); // What's New page after updates
+ // user_pref("browser.tabs.warnOnClose", false);
+ // user_pref("browser.tabs.warnOnCloseOtherTabs", false);
+ // user_pref("browser.tabs.warnOnOpen", false);
+ // user_pref("full-screen-api.warning.delay", 0);
+ // user_pref("full-screen-api.warning.timeout", 0);
+ // user_pref("browser.download.autohideButton", false); // (FF57+)
+ // user_pref("toolkit.cosmeticAnimations.enabled", false); // (FF55+)
+/* CONTENT BEHAVIOR ***/
+ // user_pref("accessibility.typeaheadfind", true); // enable "Find As You Type"
+ // user_pref("clipboard.autocopy", false); // disable autocopy default [LINUX]
+ // user_pref("layout.spellcheckDefault", 2); // 0=none, 1-multi-line, 2=multi-line & single-line
+ // user_pref("browser.backspace_action", 2); // 0=previous page, 1=scroll up, 2=do nothing
+ // user_pref("browser.ctrlTab.previews", true);
+ // user_pref("browser.tabs.closeWindowWithLastTab", false);
+ // user_pref("browser.tabs.loadBookmarksInTabs", true); // open bookmarks in a new tab (FF57+)
+ // user_pref("browser.urlbar.decodeURLsOnCopy", true); // see Bugzilla 1320061 (FF53+)
+ // user_pref("general.autoScroll", false); // middle-click enabling auto-scrolling [WINDOWS] [MAC]
+ // user_pref("ui.key.menuAccessKey", 0); // disable alt key toggling the menu bar [RESTART]
+ // user_pref("browser.bookmarks.max_backups", 2);
+ // user_pref("identity.fxaccounts.enabled", false); // disable and hide Firefox Accounts and Sync (FF60+) [RESTART]
+ // user_pref("network.manage-offline-status", false); // see Bugzilla 620472
+ // user_pref("reader.parse-on-load.enabled", false); // "Reader View"
+ // user_pref("xpinstall.signatures.required", false); // enforced extension signing (Nightly/ESR)
+/*** 9999: DEPRECATED / REMOVED / LEGACY / RENAMED
+ Documentation denoted as [-]. Numbers may be re-used. See [1] for a link-clickable,
+ viewer-friendly version of the deprecated bugzilla tickets. The original state of each pref
+ has been preserved, or changed to match the current setup, but you are advised to review them.
+ [NOTE] Up to FF53, to enable a section change /* FFxx to // FFxx
+ For FF53 on, we have bundled releases to cater for ESR. Change /* to // on the first line
+ [1] https://github.com/ghacksuserjs/ghacks-user.js/issues/123
+user_pref("_user.js.parrot", "9999 syntax error: the parrot's deprecated!");
+// 2604: (25+) disable page thumbnails - replaced by browser.pagethumbnails.capturing_disabled
+ // [-] https://bugzilla.mozilla.org/897811
+user_pref("pageThumbs.enabled", false);
+// 2503: (31+) disable network API - replaced by dom.netinfo.enabled
+ // [-] https://bugzilla.mozilla.org/960426
+user_pref("dom.network.enabled", false);
+// 2600's: (35+) disable WebSockets
+ // [-] https://bugzilla.mozilla.org/1091016
+user_pref("network.websocket.enabled", false);
+// 1610: (36+) set DNT "value" to "not be tracked" (FF21+)
+ // [1] http://kb.mozillazine.org/Privacy.donottrackheader.value
+ // [-] https://bugzilla.mozilla.org/1042135#c101
+ // user_pref("privacy.donottrackheader.value", 1);
+// 2023: (37+) disable camera autofocus callback
+ // The API will be superseded by the WebRTC Capture and Stream API
+ // [1] https://developer.mozilla.org/docs/Archive/B2G_OS/API/CameraControl
+ // [-] https://bugzilla.mozilla.org/1107683
+user_pref("camera.control.autofocus_moving_callback.enabled", false);
+// 0415: (41+) disable reporting URLs (safe browsing) - removed or replaced by various
+ // [-] https://bugzilla.mozilla.org/1109475
+user_pref("browser.safebrowsing.reportErrorURL", ""); // browser.safebrowsing.reportPhishMistakeURL
+user_pref("browser.safebrowsing.reportGenericURL", ""); // removed
+user_pref("browser.safebrowsing.reportMalwareErrorURL", ""); // browser.safebrowsing.reportMalwareMistakeURL
+user_pref("browser.safebrowsing.reportMalwareURL", ""); // removed
+user_pref("browser.safebrowsing.reportURL", ""); // removed
+// 0702: (41+) disable HTTP2 (draft)
+ // [-] https://bugzilla.mozilla.org/1132357
+user_pref("network.http.spdy.enabled.http2draft", false);
+// 1804: (41+) disable plugin enumeration
+ // [-] https://bugzilla.mozilla.org/1169945
+user_pref("plugins.enumerable_names", "");
+// 2803: (42+) clear passwords on shutdown
+ // [-] https://bugzilla.mozilla.org/1102184
+ // user_pref("privacy.clearOnShutdown.passwords", false);
+// 5002: (42+) disable warning when a domain requests full screen
+ // replaced by setting full-screen-api.warning.timeout to zero
+ // [-] https://bugzilla.mozilla.org/1160017
+ // user_pref("full-screen-api.approval-required", false);
+// 0410's: disable safebrowsing urls & updates - replaced by various
+ // [-] https://bugzilla.mozilla.org/1107372
+ // user_pref("browser.safebrowsing.gethashURL", ""); // browser.safebrowsing.provider.google.gethashURL
+ // user_pref("browser.safebrowsing.updateURL", ""); // browser.safebrowsing.provider.google.updateURL
+user_pref("browser.safebrowsing.malware.reportURL", ""); // browser.safebrowsing.provider.google.reportURL
+// 0420's: disable tracking protection - replaced by various
+ // [-] https://bugzilla.mozilla.org/1107372
+ // user_pref("browser.trackingprotection.gethashURL", ""); // browser.safebrowsing.provider.mozilla.gethashURL
+ // user_pref("browser.trackingprotection.updateURL", ""); // browser.safebrowsing.provider.mozilla.updateURL
+// 1803: remove plugin finder service
+ // [1] http://kb.mozillazine.org/Pfs.datasource.url
+ // [-] https://bugzilla.mozilla.org/1202193
+user_pref("pfs.datasource.url", "");
+// 5003: disable new search panel UI
+ // [-] https://bugzilla.mozilla.org/1119250
+ // user_pref("browser.search.showOneOffButtons", false);
+// 0414: disable safebrowsing's real-time binary checking (google) (FF43+)
+ // [-] https://bugzilla.mozilla.org/1237103
+user_pref("browser.safebrowsing.provider.google.appRepURL", ""); // browser.safebrowsing.appRepURL
+// 1200's: block rc4 whitelist
+ // [-] https://bugzilla.mozilla.org/1215796
+user_pref("security.tls.insecure_fallback_hosts.use_static_list", false);
+// 2300's: disable SharedWorkers
+ // [1] https://trac.torproject.org/projects/tor/ticket/15562
+ // [-] https://bugzilla.mozilla.org/1207635
+user_pref("dom.workers.sharedWorkers.enabled", false);
+// 2403: disable scripts changing images
+ // [TEST] https://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_img_src2
+ // [WARNING] Will break some sites such as Google Maps and a lot of web apps
+ // [-] https://bugzilla.mozilla.org/773429
+ // user_pref("dom.disable_image_src_set", true);
+// 1021b: disable deferred level of storing extra session data 0=all 1=http-only 2=none
+ // extra session data contains contents of forms, scrollbar positions, cookies and POST data
+ // [-] https://bugzilla.mozilla.org/1235379
+user_pref("browser.sessionstore.privacy_level_deferred", 2);
+// 0333: disable health report
+ // [-] https://bugzilla.mozilla.org/1234526
+user_pref("datareporting.healthreport.service.enabled", false); // (hidden pref)
+user_pref("datareporting.healthreport.documentServerURI", ""); // (hidden pref)
+// 0334b: disable FHR (Firefox Health Report) v2 data being sent to Mozilla servers
+ // [-] https://bugzilla.mozilla.org/1234522
+user_pref("datareporting.policy.dataSubmissionEnabled.v2", false);
+// 0414: disable safebrowsing pref - replaced by browser.safebrowsing.downloads.remote.url
+ // [-] https://bugzilla.mozilla.org/1239587
+user_pref("browser.safebrowsing.appRepURL", ""); // Google application reputation check
+// 0420: disable polaris (part of Tracking Protection, never used in stable)
+ // [-] https://bugzilla.mozilla.org/1235565
+ // user_pref("browser.polaris.enabled", false);
+// 0510: disable "Pocket" - replaced by extensions.pocket.*
+ // [-] https://bugzilla.mozilla.org/1215694
+user_pref("browser.pocket.enabled", false);
+user_pref("browser.pocket.api", "");
+user_pref("browser.pocket.site", "");
+user_pref("browser.pocket.oAuthConsumerKey", "");
+// 0330b: set unifiedIsOptIn to make sure telemetry respects OptIn choice and that telemetry
+ // is enabled ONLY for people that opted into it, even if unified Telemetry is enabled
+ // [-] https://bugzilla.mozilla.org/1236580
+user_pref("toolkit.telemetry.unifiedIsOptIn", true); // (hidden pref)
+// 0333b: disable about:healthreport page UNIFIED
+ // [-] https://bugzilla.mozilla.org/1236580
+user_pref("datareporting.healthreport.about.reportUrlUnified", "data:text/plain,");
+// 0807: disable history manipulation
+ // [1] https://developer.mozilla.org/docs/Web/API/History_API
+ // [-] https://bugzilla.mozilla.org/1249542
+user_pref("browser.history.allowPopState", false);
+user_pref("browser.history.allowPushState", false);
+user_pref("browser.history.allowReplaceState", false);
+// 0806: disable 'unified complete': 'Search with [default search engine]'
+ // [-] http://techdows.com/2016/05/firefox-unified-complete-aboutconfig-preference-removed.html
+ // [-] https://bugzilla.mozilla.org/1181078
+user_pref("browser.urlbar.unifiedcomplete", false);
+// 0372: disable "Hello"
+ // [1] https://www.mozilla.org/privacy/archive/hello/2016-03/
+ // [2] https://security.stackexchange.com/questions/94284/how-secure-is-firefox-hello
+ // [-] https://bugzilla.mozilla.org/1287827
+user_pref("loop.enabled", false);
+user_pref("loop.server", "");
+user_pref("loop.feedback.formURL", "");
+user_pref("loop.feedback.manualFormURL", "");
+user_pref("loop.facebook.appId", "");
+user_pref("loop.facebook.enabled", false);
+user_pref("loop.facebook.fallbackUrl", "");
+user_pref("loop.facebook.shareUrl", "");
+user_pref("loop.logDomains", false);
+// 2201: disable new window scrollbars being hidden
+ // [-] https://bugzilla.mozilla.org/1257887
+user_pref("dom.disable_window_open_feature.scrollbars", true);
+// 2303: disable push notification (UDP wake-up)
+ // [-] https://bugzilla.mozilla.org/1265914
+user_pref("dom.push.udp.wakeupEnabled", false);
+// 0101: disable Windows10 intro on startup [WINDOWS]
+ // [-] https://bugzilla.mozilla.org/1274633
+user_pref("browser.usedOnWindows10.introURL", "");
+// 0308: disable plugin update notifications
+ // [-] https://bugzilla.mozilla.org/1277905
+user_pref("plugins.update.notifyUser", false);
+// 0410: disable "Block dangerous and deceptive content" - replaced by browser.safebrowsing.phishing.enabled
+ // [-] https://bugzilla.mozilla.org/1025965
+ // user_pref("browser.safebrowsing.enabled", false);
+// 1266: disable rc4 ciphers
+ // [1] https://trac.torproject.org/projects/tor/ticket/17369
+ // [-] https://bugzilla.mozilla.org/1268728
+ // [-] https://www.fxsitecompat.com/en-CA/docs/2016/rc4-support-has-been-completely-removed/
+user_pref("security.ssl3.ecdhe_ecdsa_rc4_128_sha", false);
+user_pref("security.ssl3.ecdhe_rsa_rc4_128_sha", false);
+user_pref("security.ssl3.rsa_rc4_128_md5", false);
+user_pref("security.ssl3.rsa_rc4_128_sha", false);
+// 1809: remove Mozilla's plugin update URL
+ // [-] https://bugzilla.mozilla.org/1277905
+user_pref("plugins.update.url", "");
+ // [-] https://bugzilla.mozilla.org/1248197
+user_pref("network.http.spdy.enabled.v3-1", false);
+// 1851: delay play of videos until they're visible
+ // [1] https://bugzilla.mozilla.org/1180563
+ // [-] https://bugzilla.mozilla.org/1262053
+user_pref("media.block-play-until-visible", true);
+// 2504: disable virtual reality devices
+ // [-] https://bugzilla.mozilla.org/1250244
+user_pref("dom.vr.oculus050.enabled", false);
+// 1601: disable referer from an SSL Website
+ // [-] https://bugzilla.mozilla.org/1308725
+user_pref("network.http.sendSecureXSiteReferrer", false);
+// 1850: disable Adobe EME "Primetime CDM" (Content Decryption Module)
+ // [1] https://trac.torproject.org/projects/tor/ticket/16285
+ // [-] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1329538,1337121 // FF52
+ // [-] https://bugzilla.mozilla.org/1329543 // FF53
+user_pref("media.gmp-eme-adobe.enabled", false);
+user_pref("media.gmp-eme-adobe.visible", false);
+user_pref("media.gmp-eme-adobe.autoupdate", false);
+// 2405: disable WebTelephony API
+ // [1] https://wiki.mozilla.org/WebAPI/Security/WebTelephony
+ // [-] https://bugzilla.mozilla.org/1309719
+user_pref("dom.telephony.enabled", false);
+/* ESR52.x still uses all the following prefs
+// [NOTE] replace the * with a slash in the line above to re-enable them
+// 1265: block rc4 fallback
+ // [-] https://bugzilla.mozilla.org/1130670
+user_pref("security.tls.unrestricted_rc4_fallback", false);
+// 1806: disable Acrobat, Quicktime, WMP (the string = min version number allowed)
+ // [-] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1317108,1317109,1317110
+user_pref("plugin.scan.Acrobat", "99999");
+user_pref("plugin.scan.Quicktime", "99999");
+user_pref("plugin.scan.WindowsMediaPlayer", "99999");
+// 2022: disable screensharing
+ // [-] https://bugzilla.mozilla.org/1329562
+user_pref("media.getusermedia.screensharing.allow_on_old_platforms", false);
+// 2507: disable keyboard fingerprinting
+ // [-] https://bugzilla.mozilla.org/1322736
+user_pref("dom.beforeAfterKeyboardEvent.enabled", false);
+// 0415: disable reporting URLs (safe browsing)
+ // [-] https://bugzilla.mozilla.org/1288633
+user_pref("browser.safebrowsing.reportMalwareMistakeURL", "");
+user_pref("browser.safebrowsing.reportPhishMistakeURL", "");
+// 1830: block websites detecting DRM is disabled
+ // [-] https://bugzilla.mozilla.org/1242321
+user_pref("media.eme.apiVisible", false);
+// 2425: disable Archive Reader API
+ // i.e. reading archive contents directly in the browser, through DOM file objects
+ // [-] https://bugzilla.mozilla.org/1342361
+user_pref("dom.archivereader.enabled", false);
+// 0209: disable geolocation on non-secure origins (FF54+)
+ // [1] https://bugzilla.mozilla.org/1269531
+ // [-] https://bugzilla.mozilla.org/1072859
+user_pref("geo.security.allowinsecure", false);
+// 0336: disable "Heartbeat" (Mozilla user rating telemetry) (FF37+)
+ // [1] https://trac.torproject.org/projects/tor/ticket/18738
+ // [-] https://bugzilla.mozilla.org/1361578
+user_pref("browser.selfsupport.enabled", false); // (hidden pref)
+user_pref("browser.selfsupport.url", "");
+// 0360: disable new tab "pings"
+ // [-] https://bugzilla.mozilla.org/1241390
+user_pref("browser.newtabpage.directory.ping", "data:text/plain,");
+// 0861: disable saving form history on secure websites
+ // [-] https://bugzilla.mozilla.org/1361220
+user_pref("browser.formfill.saveHttpsForms", false);
+// 0863: disable Form Autofill (FF54+) - replaced by extensions.formautofill.*
+ // [-] https://bugzilla.mozilla.org/1364334
+user_pref("browser.formautofill.enabled", false);
+// 2410: disable User Timing API
+ // [1] https://trac.torproject.org/projects/tor/ticket/16336
+ // [-] https://bugzilla.mozilla.org/1344669
+user_pref("dom.enable_user_timing", false);
+// 2507: disable keyboard fingerprinting (FF38+) (physical keyboards)
+ // The Keyboard API allows tracking the "read parameter" of pressed keys in forms on
+ // web pages. These parameters vary between types of keyboard layouts such as QWERTY,
+ // AZERTY, Dvorak, and between various languages, e.g. German vs English.
+ // [WARNING] Don't use if Android + physical keyboard
+ // [1] https://developer.mozilla.org/docs/Web/API/KeyboardEvent/code
+ // [2] https://www.privacy-handbuch.de/handbuch_21v.htm
+ // [-] https://bugzilla.mozilla.org/1352949
+user_pref("dom.keyboardevent.code.enabled", false);
+// 5015: disable tab animation - replaced by toolkit.cosmeticAnimations.enabled
+ // [-] https://bugzilla.mozilla.org/1352069
+user_pref("browser.tabs.animate", false);
+// 5016: disable fullscreeen animation - replaced by toolkit.cosmeticAnimations.enabled
+ // [-] https://bugzilla.mozilla.org/1352069
+user_pref("browser.fullscreen.animate", false);
+// 0515: disable Screenshots (rollout pref only) (FF54+)
+ // [-] https://bugzilla.mozilla.org/1386333
+ // user_pref("extensions.screenshots.system-disabled", true);
+// 0517: disable Form Autofill (FF55+) - replaced by extensions.formautofill.available
+ // [-] https://bugzilla.mozilla.org/1385201
+user_pref("extensions.formautofill.experimental", false);
+// 0374: disable "social" integration
+ // [1] https://developer.mozilla.org/docs/Mozilla/Projects/Social_API
+ // [-] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1388902,1406193 (some leftovers were removed in FF58)
+user_pref("social.whitelist", "");
+user_pref("social.toast-notifications.enabled", false);
+user_pref("social.shareDirectory", "");
+user_pref("social.remote-install.enabled", false);
+user_pref("social.directories", "");
+user_pref("social.share.activationPanelEnabled", false);
+user_pref("social.enabled", false); // (hidden pref)
+// 1830: disable DRM's EME WideVineAdapter
+ // [-] https://bugzilla.mozilla.org/1395468
+user_pref("media.eme.chromium-api.enabled", false); // (FF55+)
+// 2608: disable WebIDE extension downloads (Valence)
+ // [1] https://trac.torproject.org/projects/tor/ticket/16222
+ // [-] https://bugzilla.mozilla.org/1393497
+user_pref("devtools.webide.autoinstallFxdtAdapters", false);
+// 2600's: disable SimpleServiceDiscovery - which can bypass proxy settings - e.g. Roku
+ // [1] https://trac.torproject.org/projects/tor/ticket/16222
+ // [-] https://bugzilla.mozilla.org/1393582
+user_pref("browser.casting.enabled", false);
+// 5022: hide recently bookmarked items (you still have the original bookmarks) (FF49+)
+ // [-] https://bugzilla.mozilla.org/1401238
+user_pref("browser.bookmarks.showRecentlyBookmarked", false);
+// 0203: disable using OS locale, force APP locale - replaced by intl.locale.requested
+ // [-] https://bugzilla.mozilla.org/1414390
+user_pref("intl.locale.matchOS", false);
+// 0204: set APP locale - replaced by intl.locale.requested
+ // [-] https://bugzilla.mozilla.org/1414390
+user_pref("general.useragent.locale", "en-US");
+// 0333b: disable about:healthreport page (which connects to Mozilla for locale/css+js+json)
+ // If you have disabled health reports, then this about page is useless - disable it
+ // If you want to see what health data is present, then this must be set at default
+ // [-] https://bugzilla.mozilla.org/1352497
+user_pref("datareporting.healthreport.about.reportUrl", "data:text/plain,");
+// 0511: disable FlyWeb (FF49+)
+ // Flyweb is a set of APIs for advertising and discovering local-area web servers
+ // [1] https://flyweb.github.io/
+ // [2] https://wiki.mozilla.org/FlyWeb/Security_scenarios
+ // [3] https://www.ghacks.net/2016/07/26/firefox-flyweb/
+ // [-] https://bugzilla.mozilla.org/1374574
+user_pref("dom.flyweb.enabled", false);
+// 1007: disable randomized FF HTTP cache decay experiments
+ // [1] https://trac.torproject.org/projects/tor/ticket/13575
+ // [-] https://bugzilla.mozilla.org/1430197
+user_pref("browser.cache.frecency_experiment", -1);
+// 1242: enable Mixed-Content-Blocker to use the HSTS cache but disable the HSTS Priming requests (FF51+)
+ // Allow resources from domains with an existing HSTS cache record or in the HSTS preload list
+ // to be upgraded to HTTPS internally but disable sending out HSTS Priming requests, because
+ // those may cause noticeable delays e.g. requests time out or are not handled well by servers
+ // [NOTE] If you want to use the priming requests make sure 'use_hsts' is also true
+ // [1] https://bugzilla.mozilla.org/1246540#c145
+ // [-] https://bugzilla.mozilla.org/1424917
+user_pref("security.mixed_content.use_hsts", true);
+user_pref("security.mixed_content.send_hsts_priming", false);
+// 1606: set the default Referrer Policy - replaced by network.http.referer.defaultPolicy
+ // [-] https://bugzilla.mozilla.org/587523
+user_pref("network.http.referer.userControlPolicy", 3); // (FF53-FF58) default: 3
+// 1804: disable plugins using external/untrusted scripts with XPCOM or XPConnect
+ // [-] (part8) https://bugzilla.mozilla.org/1416703#c21
+user_pref("security.xpconnect.plugin.unrestricted", false);
+// 2022: disable screensharing domain whitelist
+ // [-] https://bugzilla.mozilla.org/1411742
+user_pref("media.getusermedia.screensharing.allowed_domains", "");
+// 2023: disable camera stuff
+ // [-] (part7) https://bugzilla.mozilla.org/1416703#c21
+user_pref("camera.control.face_detection.enabled", false);
+// 2202: prevent scripts from changing the status text
+ // [-] https://bugzilla.mozilla.org/1425999
+user_pref("dom.disable_window_status_change", true);
+// 2416: disable idle observation
+ // [-] (part7) https://bugzilla.mozilla.org/1416703#c21
+user_pref("dom.idle-observers-api.enabled", false);
+// 0360: disable new tab tile ads & preload & marketing junk
+ // [-] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1370930,1433133
+user_pref("browser.newtabpage.directory.source", "data:text/plain,");
+user_pref("browser.newtabpage.enhanced", false);
+user_pref("browser.newtabpage.introShown", true);
+// 0512: disable Shield (FF53+) - replaced internally by Normandy (see 0503)
+ // Shield is an telemetry system (including Heartbeat) that can also push and test "recipes"
+ // [1] https://wiki.mozilla.org/Firefox/Shield
+ // [2] https://github.com/mozilla/normandy
+ // [-] https://bugzilla.mozilla.org/1436113
+user_pref("extensions.shield-recipe-client.enabled", false);
+user_pref("extensions.shield-recipe-client.api_url", "");
+// 0514: disable Activity Stream (FF54+)
+ // [-] https://bugzilla.mozilla.org/1433324
+user_pref("browser.newtabpage.activity-stream.enabled", false);
+// 2301: disable workers
+ // [WARNING] Disabling workers *will* break sites (e.g. Google Street View, Twitter)
+ // [NOTE] CVE-2016-5259, CVE-2016-2812, CVE-2016-1949, CVE-2016-5287 (fixed)
+ // [-] https://bugzilla.mozilla.org/1434934
+user_pref("dom.workers.enabled", false);
+// 5000's: open "page/selection source" in a new window
+ // [-] https://bugzilla.mozilla.org/1418403
+ // user_pref("view_source.tab", false);
+/* ESR60.x still uses all the following prefs
+// [NOTE] replace the * with a slash in the line above to re-enable them
+// 0501: disable experiments
+ // [1] https://wiki.mozilla.org/Telemetry/Experiments
+ // [-] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1420908,1450801
+user_pref("experiments.enabled", false);
+user_pref("experiments.manifest.uri", "");
+user_pref("experiments.supported", false);
+user_pref("experiments.activeExperiment", false);
+// 2612: disable remote JAR files being opened, regardless of content type (FF42+)
+ // [1] https://bugzilla.mozilla.org/1173171
+ // [2] https://www.fxsitecompat.com/en-CA/docs/2015/jar-protocol-support-has-been-disabled-by-default/
+ // [-] https://bugzilla.mozilla.org/1427726
+user_pref("network.jar.block-remote-files", true);
+// 2613: disable JAR from opening Unsafe File Types
+ // [-] https://bugzilla.mozilla.org/1427726
+user_pref("network.jar.open-unsafe-types", false);
+// 1803: disable Java plugin
+ // [-] (part5) https://bugzilla.mozilla.org/1461243
+user_pref("plugin.state.java", 0);
+/* END: internal custom pref to test for syntax errors ***/
+user_pref("_user.js.parrot", "SUCCESS: No no he's not dead, he's, he's restin'!");