v85

1201: add error code, fixes #1094
network.http.redirection-limit, fixes #1100
2025-09-01 09:28:31 +02:00 · 2021-01-28 03:13:36 +00:00 · 2021-01-26 19:58:57 +00:00 · 2021-01-26 19:39:33 +00:00 · 2021-01-26 19:37:54 +00:00 · 2021-01-22 12:15:12 +00:00
8 changed files with 303 additions and 384 deletions
--- a/.github/ISSUE_TEMPLATE/troubleshooting-help.md
+++ b/.github/ISSUE_TEMPLATE/troubleshooting-help.md
@ -15,6 +15,7 @@ Before you proceed...
  - Note: We do not support forks

 See also:
+  - Override Recipes [issue 1080](https://github.com/arkenfox/user.js/issues/1080)
  - Extension breakage due to prefs [issue 391](https://github.com/arkenfox/user.js/issues/391)
  - Prefs vs Recommended Extensions: Co-Existance+Enhancement | Conflicts [issue 350](https://github.com/arkenfox/user.js/issues/350)

--- a/README.md
+++ b/README.md
@ -22,7 +22,6 @@ Also be aware that the `arkenfox user.js` is made specifically for desktop Firef
 - [diffs](https://github.com/arkenfox/user.js/issues?q=is%3Aissue+label%3Adiffs)

 ### 🟥  acknowledgments
-Literally thousands of sources, references and suggestions. Special mention to:
+Literally thousands of sources, references and suggestions. Many thanks, and much appreciated.

- * This [12bytes article](https://12bytes.org/articles/tech/firefox/firefoxgecko-configuration-guide-for-privacy-and-performance-buffs) which uses the `arkenfox user.js` and supplements it with an additional JS hosted at [Codeberg](https://codeberg.org/12bytes.org/Firefox-user.js-supplement)

--- a/prefsCleaner.bat
+++ b/prefsCleaner.bat
@ -3,7 +3,7 @@ TITLE prefs.js cleaner

 REM ### prefs.js cleaner for Windows
 REM ## author: @claustromaniac
-REM ## version: 2.3
+REM ## version: 2.4

 CD /D "%~dp0"

@ -13,7 +13,7 @@ ECHO:
 ECHO                 ########################################
 ECHO                 ####  prefs.js cleaner for Windows  ####
 ECHO                 ####        by claustromaniac       ####
-ECHO                 ####              v2.3              ####
+ECHO                 ####              v2.4              ####
 ECHO                 ########################################
 ECHO:
 CALL :message "This script should be run from your Firefox profile directory."
@ -28,6 +28,7 @@ IF ERRORLEVEL 3 (EXIT /B)
 IF ERRORLEVEL 2 (GOTO :showhelp)
 IF NOT EXIST "user.js" (CALL :abort "user.js not found in the current directory." 30)
 IF NOT EXIST "prefs.js" (CALL :abort "prefs.js not found in the current directory." 30)
+CALL :strlenCheck
 CALL :FFcheck
 CALL :message "Backing up prefs.js..."
 SET "_time=%time: =0%"
@ -50,6 +51,21 @@ ECHO:
 ECHO:  %~1
 ECHO:
 GOTO :EOF
+REM ### string length Check Function ####
+:strlenCheck
+SET /a cnt=0
+setlocal ENABLEDELAYEDEXPANSION
+FOR /F "tokens=1,* delims=:" %%G IN ('FINDSTR /N "^" prefs.js') DO (
+	ECHO:%%H >nul
+	SET /a cnt += 1
+	IF /I "%%G" NEQ "!cnt!" (
+		ECHO:
+		CALL :message "ERROR: line !cnt! in prefs.js is too long."
+		(CALL :abort "Aborting ..." 30)
+	)
+)
+endlocal
+GOTO :EOF
 REM ####### Firefox Check Function ######
 :FFcheck
 TASKLIST /FI "IMAGENAME eq firefox.exe" 2>NUL | FIND /I /N "firefox.exe">NUL
--- a/scratchpad-scripts/arkenfox-clear-removed.js
+++ b/scratchpad-scripts/arkenfox-clear-removed.js
@ -1,7 +1,7 @@
 /***
 This will reset the preferences that have been removed completely from the arkenfox user.js.

- Last updated: 2-Oct-2020
+ Last updated: 26-Jan-2021

 For instructions see:
 https://github.com/arkenfox/user.js/wiki/3.1-Resetting-Inactive-Prefs-[Scripts]
@ -223,8 +223,17 @@
    'browser.search.region',
    /* 79-beta */
    'browser.urlbar.usepreloadedtopurls.enabled',
-    /* 80 */
+    /* 82-beta */
    'dom.IntersectionObserver.enabled',
+    'extensions.screenshots.upload-disabled',
+    'privacy.partition.network_state',
+    'security.ssl3.dhe_rsa_aes_128_sha',
+    'security.ssl3.dhe_rsa_aes_256_sha',
+    /* 84-beta */
+    'browser.newtabpage.activity-stream.asrouter.providers.snippets',
+    'layout.css.visited_links_enabled',
+    /* 85-beta */
+    'network.http.redirection-limit',
    /* reset parrot: check your open about:config after running the script */
    '_user.js.parrot'
  ]
--- a/scratchpad-scripts/troubleshooter.js
+++ b/scratchpad-scripts/troubleshooter.js
@ -1,5 +1,5 @@

-/*** arkenfox user.js troubleshooter.js v1.6.1 ***/
+/*** arkenfox user.js troubleshooter.js v1.6.3 ***/

 (function() {

@ -17,9 +17,7 @@

    /* Storage + Cache */
    'browser.cache.offline.enable',
-    'dom.indexedDB.enabled',
    'dom.storage.enabled',
-    'browser.storageManager.enabled',
    'dom.storageManager.enabled',

    /* Workers, Web + Push Notifications */
@ -34,7 +32,6 @@
    /* Fonts */
    'browser.display.use_document_fonts',
    'font.blacklist.underline_offset',
-    'gfx.downloadable_fonts.woff2.enabled',
    'gfx.font_rendering.graphite.enabled',
    'gfx.font_rendering.opentype_svg.enabled',
    'layout.css.font-loading-api.enabled',
@ -47,12 +44,10 @@
    'dom.IntersectionObserver.enabled',
    'dom.popup_allowed_events',
    'full-screen-api.enabled',
-    'geo.wifi.uri',
    'intl.accept_languages',
    'javascript.options.asmjs',
    'javascript.options.wasm',
    'permissions.default.shortcuts',
-    'security.csp.experimentalEnabled',

    /* Hardware */
    'dom.vr.enabled',
@ -60,8 +55,8 @@

    /* Audio + Video */
    'dom.webaudio.enabled',
-    'media.autoplay.enabled',
    'media.autoplay.default', // FF63+
+    'media.autoplay.blocking_policy', // FF78+

    /* Forms */
    'browser.formfill.enable',
@ -88,13 +83,11 @@

    /* Plugins + Flash */
    'plugin.default.state',
-    'plugin.defaultXpi.state',
-    'plugin.sessionPermissionNow.intervalInMinutes',
    'plugin.state.flash',

    /* unlikely to cause problems */
-    'browser.tabs.remote.allowLinkedWebInFileUriProcess',
    'dom.popup_maximum',
+    'geo.provider.network.url',
    'layout.css.visited_links_enabled',
    'mathml.disabled',
    'network.auth.subresource-http-auth-allow',
@ -102,6 +95,7 @@
    'network.protocol-handler.external.ms-windows-store',
    'privacy.trackingprotection.enabled',
    'security.data_uri.block_toplevel_data_uri_navigations',
+    'privacy.window.name.update.enabled', // FF82+

    'last.one.without.comma'
  ]
@ -167,8 +161,8 @@
    reapply(aALL);
    myreset(aTmp.slice(0, _h(aTmp)));
    while (aTmp.length) {
-      alert("NOW TEST AGAIN !");
-      if (confirm("if the problem still exists click OK, otherwise click cancel.")) {
+      alert('NOW TEST AGAIN !');
+      if (confirm('if the problem still exists click OK, otherwise click Cancel.')) {
        aTmp = aTmp.slice(_h(aTmp));
      } else {
        aTmp = aTmp.slice(0, _h(aTmp));
@ -182,16 +176,16 @@

    if (aDbg.length == 1) return alert("narrowed it down to:\n\n"+aDbg[0].name+"\n");
    if (aDbg.length == aALL.length) {
-      let msg = "Failed to narrow it down beyond the initial "+aALL.length+" prefs. The problem is most likely caused by at least 2 prefs!\n\n";
-      msg += "Either those prefs are too far apart in the list or there are exactly 2 culprits and they just happen to be at the wrong place.\n\n";
-      msg += "In case it's the latter, the script can add a dummy pref and you can try again - Try again?";
+      const msg = "Failed to narrow it down beyond the initial "+aALL.length+" prefs. The problem is most likely caused by at least 2 prefs!\n\n" +
+            "Either those prefs are too far apart in the list or there are exactly 2 culprits and they just happen to be at the wrong place.\n\n" +
+            "In case it's the latter, the script can add a dummy pref and you can try again - Try again?";
      if (confirm(msg)) return _main([...aALL, oFILLER]);
    } else if (aDbg.length > 10 && confirm("Narrowed it down to "+aDbg.length+" prefs. Try narrowing it down further?")) {
      return _main(aDbg.reverse());
    }

    alert("Narrowed it down to "+ aDbg.length.toString() +" prefs, check the console ...");
-    console.log("The problem is caused by 2 or more of these prefs:");
+    console.log('The problem is caused by 2 or more of these prefs:');
    for (const oPref of aDbg) console.log(oPref.name);
  }

@ -200,14 +194,18 @@

  const aBAK = getMyList(aPREFS);
  //console.log(aBAK.length, "user-set prefs from our list detected and their values stored.");
+  
+  const sMsg = "all detected prefs reset.\n\n" +
+        "!! KEEP THIS PROMPT OPEN AND TEST THE SITE IN ANOTHER TAB !!\n\n" +
+        "IF the problem still exists, this script can't help you - click Cancel to re-apply your values and exit.\n\n" +
+        "Click OK if your problem is fixed.";

  focus();
  myreset(aBAK);
-  if (!confirm("all detected prefs reset.\n\n!! KEEP THIS PROMPT OPEN AND TEST THE SITE IN ANOTHER TAB !!\n\nIF the problem still exists, this script can't help you - click cancel to re-apply your values and exit.\n\nClick OK if your problem is fixed.")) {
+  if (!confirm(sMsg)) {
    reapply(aBAK);
    return;
  }
-
  _main(aBAK);

 })();
--- a/updater.bat
+++ b/updater.bat
@ -3,10 +3,10 @@ TITLE arkenfox user.js updater

 REM ## arkenfox user.js updater for Windows
 REM ## author: @claustromaniac
-REM ## version: 4.12
+REM ## version: 4.14
 REM ## instructions: https://github.com/arkenfox/user.js/wiki/3.3-Updater-Scripts

-SET v=4.12
+SET v=4.14

 VERIFY ON
 CD /D "%~dp0"
@ -28,6 +28,15 @@ SHIFT
 GOTO parse
 :endparse

+FOR /F %%i IN ('PowerShell -Command "[Enum]::GetNames([Net.SecurityProtocolType]) -contains 'Tls12'"') DO (
+	IF "%%i" == "False" (
+		CALL :message "Your PowerShell version doesn't support TLS1.2 ^!"
+		ECHO:  Instructions to update PowerShell are on the arkenfox wiki
+		PAUSE
+		EXIT
+	)
+)
+
 IF DEFINED _updateb (
 	REM The normal flow here goes from phase 1 to phase 2 and then phase 3.
 	IF NOT "!_myname:~0,9!"=="[updated]" (
@ -51,9 +60,7 @@ IF DEFINED _updateb (
 		CALL :message "Updating script..."
 		REM Uncomment the next line and comment out the PowerShell call for testing.
 		REM COPY /B /Y "!_myname!.bat" "[updated]!_myname!.bat" >nul
-		(
-			PowerShell -Command "(New-Object Net.WebClient).DownloadFile('https://raw.githubusercontent.com/arkenfox/user.js/master/updater.bat', '[updated]!_myname!.bat')"
-		) >nul 2>&1
+		CALL :psdownload https://raw.githubusercontent.com/arkenfox/user.js/master/updater.bat "[updated]!_myname!.bat"
 		IF EXIST "[updated]!_myname!.bat" (
 			START /min CMD /C "[updated]!_myname!.bat" !_myparams!
 		) ELSE (
@ -132,9 +139,7 @@ IF DEFINED _log (
 )
 IF EXIST user.js.new (DEL /F "user.js.new")
 CALL :message "Retrieving latest user.js file from github repository..."
-(
-	PowerShell -Command "(New-Object Net.WebClient).DownloadFile('https://raw.githubusercontent.com/arkenfox/user.js/master/user.js', 'user.js.new')"
-) >nul 2>&1
+CALL :psdownload https://raw.githubusercontent.com/arkenfox/user.js/master/user.js "user.js.new"
 IF EXIST user.js.new (
 	IF DEFINED _rfpalts (
 		CALL :message "Activating RFP Alternatives section..."
@ -218,6 +223,13 @@ IF NOT "2"=="%_log%" (ECHO:)
 ENDLOCAL
 GOTO :EOF

+::::::::::::::: Download :::::::::::::::
+:psdownload
+(
+	PowerShell -Command "[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; (New-Object Net.WebClient).DownloadFile('%~1', '%~2')"
+) >nul 2>&1
+GOTO :EOF
+
 ::::::::::::::: Activate Section :::::::::::::::
 :activate
 :: arg1 = file
--- a/updater.sh
+++ b/updater.sh
@ -2,7 +2,7 @@

 ## arkenfox user.js updater for macOS and Linux

-## version: 2.8
+## version: 2.9
 ## Author: Pat Johnson (@overdodactyl)
 ## Additional contributors: @earthlng, @ema-pe, @claustromaniac

@ -10,9 +10,9 @@

 readonly CURRDIR=$(pwd)

-sfp=$(readlink -f "${BASH_SOURCE[0]}" 2>/dev/null || greadlink -f "${BASH_SOURCE[0]}" 2>/dev/null)
-[ -z "$sfp" ] && sfp=${BASH_SOURCE[0]}
-readonly SCRIPT_DIR=$(dirname "${sfp}")
+SCRIPT_FILE=$(readlink -f "${BASH_SOURCE[0]}" 2>/dev/null || greadlink -f "${BASH_SOURCE[0]}" 2>/dev/null)
+[ -z "$SCRIPT_FILE" ] && SCRIPT_FILE=${BASH_SOURCE[0]}
+readonly SCRIPT_DIR=$(dirname "${SCRIPT_FILE}")


 #########################
@ -198,7 +198,7 @@ update_updater () {
  declare -r tmpfile="$(download_file 'https://raw.githubusercontent.com/arkenfox/user.js/master/updater.sh')"
  [ -z "${tmpfile}" ] && echo -e "${RED}Error! Could not download updater.sh${NC}" && return 1 # check if download failed

-  if [[ $(get_updater_version "${SCRIPT_DIR}/updater.sh") < $(get_updater_version "${tmpfile}") ]]; then
+  if [[ $(get_updater_version "$SCRIPT_FILE") < $(get_updater_version "${tmpfile}") ]]; then
    if [ $UPDATE = 'check' ]; then
      echo -e "There is a newer version of updater.sh available. ${RED}Update and execute Y/N?${NC}"
      read -p "" -n 1 -r
@ -208,9 +208,9 @@ update_updater () {
  else
    return 0 # No update available
  fi
-  mv "${tmpfile}" "${SCRIPT_DIR}/updater.sh"
-  chmod u+x "${SCRIPT_DIR}/updater.sh"
-  "${SCRIPT_DIR}/updater.sh" "$@" -d
+  mv "${tmpfile}" "$SCRIPT_FILE"
+  chmod u+x "$SCRIPT_FILE"
+  "$SCRIPT_FILE" "$@" -d
  exit 0
 }

--- a/user.js
+++ b/user.js
@ -1,44 +1,44 @@
 /******
 * name: arkenfox user.js
-* date: 13 Oct 2020
-* version 81
+* date: 28 Jan 2021
+* version 85
 * url: https://github.com/arkenfox/user.js
 * license: MIT: https://github.com/arkenfox/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/arkenfox/user.js/releases
-
 * README:

-  0. Consider using Tor Browser if it meets your needs or fits your threat model better
-     * https://www.torproject.org/about/torusers.html.en
-  1. READ the full README
-     * https://github.com/arkenfox/user.js/blob/master/README.md
-  2. READ this
-     * https://github.com/arkenfox/user.js/wiki/1.3-Implementation
-  3. If you skipped steps 1 and 2 above (shame on you), then here is the absolute minimum
-     * Real time binary checks with Google services are disabled (0412)
-     * You will still get prompts to update Firefox, but auto-installing them is disabled (0302a)
-     * Some user data is erased on close (section 2800). Change this to suit your needs
-     * EACH RELEASE check:
-         - 4600s: reset prefs made redundant due to privacy.resistFingerprinting (RPF)
-                  or enable them as an alternative to RFP (or some of them for ESR users)
-         - 9999s: reset deprecated prefs in about:config or enable the relevant section for ESR
-     * Site breakage WILL happen
-         - There are often trade-offs and conflicts between Security vs Privacy vs Anti-Fingerprinting
-           and these need to be balanced against Functionality & Convenience & Breakage
-     * You will need to make changes, and to troubleshoot at times (choose wisely, there is always a trade-off).
-       While not 100% definitive, search for "[SETUP". If required, add each pref to your overrides section at
-       default values (or comment them out and reset them in about:config). Here are the main ones:
+  1. Consider using Tor Browser if it meets your needs or fits your threat model better
+       * https://www.torproject.org/about/torusers.html.en
+  2. Required reading: Overview, Backing Up, Implementing, and Maintenance entries
+       * https://github.com/arkenfox/user.js/wiki
+  3. If you skipped step 2, return to step 2
+  4. Make changes
+       * There are often trade-offs and conflicts between security vs privacy vs anti-fingerprinting
+         and these need to be balanced against functionality & convenience & breakage
+       * Some site breakage and unintended consequences will happen. Everyone's experience will differ
+         e.g. some user data is erased on close (section 2800), change this to suit your needs
+       * While not 100% definitive, search for "[SETUP" tags
+       * Take the wiki link in step 2 and read the Troubleshooting entry
+  5. Some tag info
       [SETUP-SECURITY] it's one item, read it
            [SETUP-WEB] can cause some websites to break
-         [SETUP-CHROME] changes how Firefox itself behaves (i.e. NOT directly website related)
+         [SETUP-CHROME] changes how Firefox itself behaves (i.e. not directly website related)
           [SETUP-PERF] may impact performance
-         [SETUP-HARDEN] maybe you should consider using the Tor Browser
-     * [WARNING] tags are extra special and used sparingly, so heed them
-  4. BACKUP your profile folder before implementing (and/or test in a new/cloned profile)
-  5. KEEP UP TO DATE: https://github.com/arkenfox/user.js/wiki#small_orange_diamond-maintenance
+              [WARNING] used sparingly, heed them
+  6. Override Recipes: https://github.com/arkenfox/user.js/issues/1080
+
+* RELEASES: https://github.com/arkenfox/user.js/releases
+
+  * It is best to use the arkenfox release that is optimized for and matches your Firefox version
+  * EVERYONE: each release
+    - run prefsCleaner or reset deprecated prefs (9999s) and prefs made redundant by RPF (4600s)
+    - re-enable section 4600 if you don't use RFP
+    ESR78
+    - If you are not using arkenfox v78... (not a definitive list)
+      - 1244: HTTPS-Only mode is enabled
+      - 1401: document fonts is inactive as it is now covered by RFP in FF80+
+      - 4600: some prefs may apply even if you use RFP (currently none apply as of FF84)
+      - 9999: switch the appropriate deprecated section(s) back on

 * INDEX:

@ -68,7 +68,7 @@
  4000: FPI (FIRST PARTY ISOLATION)
  4500: RFP (RESIST FINGERPRINTING)
  4600: RFP ALTERNATIVES
-  4700: RFP ALTERNATIVES (NAVIGATOR / USER AGENT (UA) SPOOFING)
+  4700: RFP ALTERNATIVES (USER AGENT SPOOFING)
  5000: PERSONAL
  9999: DEPRECATED / REMOVED / LEGACY / RENAMED

@ -116,7 +116,6 @@ user_pref("browser.newtabpage.activity-stream.telemetry", false);
 * Runs code received from a server (aka Remote Code Execution) and sends information back to a metrics server
 * [1] https://abouthome-snippets-service.readthedocs.io/ ***/
 user_pref("browser.newtabpage.activity-stream.feeds.snippets", false);
-user_pref("browser.newtabpage.activity-stream.asrouter.providers.snippets", "{}");
 /* 0105c: disable Activity Stream Top Stories, Pocket-based and/or sponsored content ***/
 user_pref("browser.newtabpage.activity-stream.feeds.section.topstories", false);
 user_pref("browser.newtabpage.activity-stream.section.highlights.includePocket", false);
@ -160,10 +159,6 @@ user_pref("geo.provider.network.url", "https://location.services.mozilla.com/v1/
 user_pref("geo.provider.ms-windows-location", false); // [WINDOWS]
 user_pref("geo.provider.use_corelocation", false); // [MAC]
 user_pref("geo.provider.use_gpsd", false); // [LINUX]
-/* 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: disable region updates
 * [1] https://firefox-source-docs.mozilla.org/toolkit/modules/toolkit_modules/Region.html ***/
 user_pref("browser.region.network.url", ""); // [FF78+]
@ -177,19 +172,17 @@ user_pref("browser.region.update.enabled", false); // [[FF79+]
 * [TEST] https://addons.mozilla.org/about ***/
 user_pref("intl.accept_languages", "en-US, en");
 /* 0211: enforce US English locale regardless of the system locale
- * [SETUP-WEB] May break some input methods e.g xim/ibus for CJK languages, see [2]
- * [1] https://bugzilla.mozilla.org/867501
- * [2] https://bugzilla.mozilla.org/1629630 ***/
+ * [SETUP-WEB] May break some input methods e.g xim/ibus for CJK languages [1]
+ * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=867501,1629630 ***/
 user_pref("javascript.use_us_english_locale", true); // [HIDDEN PREF]

 /*** [SECTION 0300]: QUIET FOX
-     Starting in user.js v67, we only disable the auto-INSTALL of Firefox. You still get prompts
-     to update, in one click. We have NEVER disabled auto-CHECKING, and highly discourage that.
-     Previously we also disabled auto-INSTALLING of extensions (302b).
+     We only disable the auto-INSTALL of Firefox (app) updates. You still get prompts to update,
+     and it only takes one click. We highly discourage disabling auto-CHECKING for updates.

-     There are many legitimate reasons to turn off auto-INSTALLS, including hijacked or monetized
-     extensions, time constraints, legacy issues, dev/testing, and fear of breakage/bugs. It is
-     still important to do updates for security reasons, please do so manually if you make changes.
+     Legitimate reasons to disable auto-INSTALLS include hijacked/monetized extensions, time
+     constraints, legacy issues, dev/testing, and fear of breakage/bugs. It is still important
+     to do updates for security reasons, please do so manually if you make changes.
 ***/
 user_pref("_user.js.parrot", "0300 syntax error: the parrot's not pinin' for the fjords!");
 /* 0301b: disable auto-CHECKING for extension and theme updates ***/
@ -222,11 +215,11 @@ user_pref("extensions.htmlaboutaddons.recommendations.enabled", false);
 * 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]
+ * or release builds (true and false respectively) [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.enabled", false); // see [NOTE]
 user_pref("toolkit.telemetry.server", "data:,");
 user_pref("toolkit.telemetry.archive.enabled", false);
 user_pref("toolkit.telemetry.newProfilePing.enabled", false); // [FF55+]
@ -309,7 +302,7 @@ user_pref("browser.safebrowsing.downloads.remote.url", "");
 * [SETTING] Privacy & Security>Security>... "Warn you about unwanted and uncommon software" ***/
   // user_pref("browser.safebrowsing.downloads.remote.block_potentially_unwanted", false);
   // user_pref("browser.safebrowsing.downloads.remote.block_uncommon", false);
-/* 0419: disable 'ignore this warning' on SB warnings
+/* 0419: disable 'ignore this warning' on SB warnings [FF45+]
 * If clicked, it bypasses the block for that session. This is a means for admins to enforce SB
 * [TEST] see github wiki APPENDIX A: Test Sites: Section 5
 * [1] https://bugzilla.mozilla.org/1226490 ***/
@ -344,10 +337,8 @@ user_pref("extensions.systemAddon.update.url", ""); // [FF44+]
 /* 0506: disable PingCentre telemetry (used in several System Add-ons) [FF57+]
 * Currently blocked by 'datareporting.healthreport.uploadEnabled' (see 0340) ***/
 user_pref("browser.ping-centre.telemetry", false);
-/* 0515: disable Screenshots
- * alternatively in FF60+, disable uploading to the Screenshots server ***/
+/* 0515: disable Screenshots ***/
   // user_pref("extensions.screenshots.disabled", true); // [FF55+]
-   // user_pref("extensions.screenshots.upload-disabled", true); // [FF60+]
 /* 0517: disable Form Autofill
 * [NOTE] Stored data is NOT secure (uses a JSON file)
 * [NOTE] Heuristics controls Form Autofill on forms without @autocomplete attributes
@ -355,6 +346,7 @@ user_pref("browser.ping-centre.telemetry", false);
 * [1] https://wiki.mozilla.org/Firefox/Features/Form_Autofill ***/
 user_pref("extensions.formautofill.addresses.enabled", false); // [FF55+]
 user_pref("extensions.formautofill.available", "off"); // [FF56+]
+user_pref("extensions.formautofill.creditCards.available", false); // [FF57+]
 user_pref("extensions.formautofill.creditCards.enabled", false); // [FF56+]
 user_pref("extensions.formautofill.heuristics.enabled", false); // [FF55+]
 /* 0518: disable Web Compatibility Reporter [FF56+]
@ -369,7 +361,7 @@ user_pref("network.prefetch-next", false);
 /* 0602: disable DNS prefetching
 * [1] https://developer.mozilla.org/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control ***/
 user_pref("network.dns.disablePrefetch", true);
-user_pref("network.dns.disablePrefetchFromHTTPS", true); // [DEFAULT: true FF70+]
+user_pref("network.dns.disablePrefetchFromHTTPS", true); // [DEFAULT: true]
 /* 0603: disable predictor / prefetching ***/
 user_pref("network.predictor.enabled", false);
 user_pref("network.predictor.enable-prefetch", false); // [FF48+]
@ -384,15 +376,15 @@ user_pref("browser.send_pings.require_same_host", true); // defense-in-depth
 /*** [SECTION 0700]: HTTP* / TCP/IP / DNS / PROXY / SOCKS etc ***/
 user_pref("_user.js.parrot", "0700 syntax error: the parrot's given up the ghost!");
 /* 0701: disable IPv6
- * IPv6 can be abused, especially with MAC addresses, and they do not play nice with VPNs. That's
- * even assuming your ISP and/or router and/or website can handle it. Sites will fall back to IPv4
- * [STATS] Firefox telemetry (June 2020) shows only 5% of all connections are IPv6
+ * IPv6 can be abused, especially with MAC addresses, and can leak with VPNs. That's even
+ * assuming your ISP and/or router and/or website can handle it. Sites will fall back to IPv4
+ * [STATS] Firefox telemetry (Dec 2020) shows ~8% of all connections are IPv6
 * [NOTE] This is just an application level fallback. Disabling IPv6 is best done at an
 * OS/network level, and/or configured properly in VPN setups. If you are not masking your IP,
 * then this won't make much difference. If you are masking your IP, then it can only help.
+ * [NOTE] PHP defaults to IPv6 with "localhost". Use "php -S 127.0.0.1:PORT"
 * [TEST] https://ipleak.org/
- * [1] https://github.com/arkenfox/user.js/issues/437#issuecomment-403740626
- * [2] https://www.internetsociety.org/tag/ipv6-security/ (see Myths 2,4,5,6) ***/
+ * [1] https://www.internetsociety.org/tag/ipv6-security/ (see Myths 2,4,5,6) ***/
 user_pref("network.dns.disableIPv6", true);
 /* 0702: disable HTTP2
 * HTTP2 raises concerns with "multiplexing" and "server push", does nothing to
@ -421,8 +413,7 @@ user_pref("network.http.altsvc.oe", false);
 * as a remote Tor node will handle the DNS request
 * [1] https://trac.torproject.org/projects/tor/wiki/doc/TorifyHOWTO/WebBrowsers ***/
 user_pref("network.proxy.socks_remote_dns", true);
-/* 0708: disable FTP [FF60+]
- * [1] https://www.fxsitecompat.dev/en-CA/docs/2020/ftp-support-will-be-removed/ ***/
+/* 0708: disable FTP [FF60+] ***/
   // user_pref("network.ftp.enabled", false);
 /* 0709: disable using UNC (Uniform Naming Convention) paths [FF61+]
 * [SETUP-CHROME] Can break extensions for profiles on network shares
@ -464,14 +455,6 @@ user_pref("keyword.enabled", false);
 user_pref("browser.fixup.alternate.enabled", false);
 /* 0803: display all parts of the url in the location bar ***/
 user_pref("browser.urlbar.trimURLs", false);
-/* 0805: disable coloring of visited links - CSS history leak
- * [NOTE] This has NEVER been fully "resolved": in Mozilla/docs it is stated it's
- * only in 'certain circumstances', also see latest comments in [2]
- * [TEST] https://earthlng.github.io/testpages/visited_links.html (see github wiki APPENDIX A 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);
 /* 0807: disable live search suggestions
 /* [NOTE] Both must be true for the location bar to work
 * [SETUP-CHROME] Change these if you trust and use a privacy respecting search engine
@ -492,6 +475,10 @@ user_pref("browser.urlbar.dnsResolveSingleWordsAfterSearch", 0);
   // user_pref("browser.urlbar.suggest.bookmark", false);
   // user_pref("browser.urlbar.suggest.openpage", false);
   // user_pref("browser.urlbar.suggest.topsites", false); // [FF78+]
+/* 0850b: disable tab-to-search [FF85+]
+ * Alternatively, you can exclude on a per-engine basis by unchecking them in Options>Search
+ * [SETTING] Privacy & Security>Address Bar>When using the address bar, suggest>Search engines ***/
+   // user_pref("browser.urlbar.suggest.engines", 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
@ -504,7 +491,7 @@ user_pref("browser.urlbar.dnsResolveSingleWordsAfterSearch", 0);
 * [1] https://support.mozilla.org/en-US/kb/address-bar-autocomplete-firefox#w_url-autocomplete ***/
   // user_pref("browser.urlbar.autoFill", false);
 /* 0860: disable search and form history
- * [SETUP-WEB] Be aware that autocomplete form data can be read by third parties, see [1] [2]
+ * [SETUP-WEB] Be aware that autocomplete form data can be read by third parties [1][2]
 * [NOTE] We also clear formdata on exit (see 2803)
 * [SETTING] Privacy & Security>History>Custom Settings>Remember search and form history
 * [1] https://blog.mindedsecurity.com/2011/10/autocompleteagain.html
@ -550,8 +537,7 @@ user_pref("signon.formlessCapture.enabled", false);
 * hardens against potential credentials phishing
 * 0=don't allow sub-resources to open HTTP authentication credentials dialogs
 * 1=don't allow cross-origin sub-resources to open HTTP authentication credentials dialogs
- * 2=allow sub-resources to open HTTP authentication credentials dialogs (default)
- * [1] https://www.fxsitecompat.com/en-CA/docs/2015/http-auth-dialog-can-no-longer-be-triggered-by-cross-origin-resources/ ***/
+ * 2=allow sub-resources to open HTTP authentication credentials dialogs (default) ***/
 user_pref("network.auth.subresource-http-auth-allow", 1);

 /*** [SECTION 1000]: CACHE / SESSION (RE)STORE / FAVICONS
@ -602,7 +588,7 @@ user_pref("browser.sessionstore.privacy_level", 2);
 /* 1022: disable resuming session from crash ***/
   // user_pref("browser.sessionstore.resume_from_crash", false);
 /* 1023: set the minimum interval between session save operations
- * Increasing this can help on older machines and some websites, as well as reducing writes, see [1]
+ * Increasing this can help on older machines and some websites, as well as reducing writes [1]
 * Default is 15000 (15 secs). Try 30000 (30 secs), 60000 (1 min) etc
 * [SETUP-CHROME] This can also affect entries in the "Recently Closed Tabs" feature:
 * i.e. the longer the interval the more chance a quick tab open/close won't be captured.
@ -638,21 +624,22 @@ user_pref("browser.shell.shortcutFavicons", false);
 user_pref("_user.js.parrot", "1200 syntax error: the parrot's a stiff!");
 /** SSL (Secure Sockets Layer) / TLS (Transport Layer Security) ***/
 /* 1201: require safe negotiation
- * Blocks connections to servers that don't support RFC 5746 [2] as they're potentially
- * vulnerable to a MiTM attack [3]. A server *without* RFC 5746 can be safe from the attack
- * if it disables renegotiations but the problem is that the browser can't know that.
- * Setting this pref to true is the only way for the browser to ensure there will be
+ * Blocks connections (SSL_ERROR_UNSAFE_NEGOTIATION) to servers that don't support RFC 5746 [2]
+ * as they're potentially vulnerable to a MiTM attack [3]. A server without RFC 5746 can be
+ * safe from the attack if it disables renegotiations but the problem is that the browser can't
+ * know that. Setting this pref to true is the only way for the browser to ensure there will be
 * no unsafe renegotiations on the channel between the browser and the server.
+ * [STATS] SSL Labs (Dec 2020) reports 99.0% of sites have secure renegotiation [4]
 * [1] https://wiki.mozilla.org/Security:Renegotiation
 * [2] https://tools.ietf.org/html/rfc5746
- * [3] https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3555 ***/
+ * [3] https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3555
+ * [4] https://www.ssllabs.com/ssl-pulse/ ***/
 user_pref("security.ssl.require_safe_negotiation", true);
 /* 1202: control TLS versions with min and max
 * 1=TLS 1.0, 2=TLS 1.1, 3=TLS 1.2, 4=TLS 1.3
- * [STATS] Firefox telemetry (June 2020) shows only 0.16% of SSL handshakes use 1.0 or 1.1
 * [WARNING] Leave these at default, otherwise you alter your TLS fingerprint.
 * [1] https://www.ssllabs.com/ssl-pulse/ ***/
-   // user_pref("security.tls.version.min", 3); // [DEFAULT: 3 FF78+]
+   // user_pref("security.tls.version.min", 3); // [DEFAULT: 3]
   // user_pref("security.tls.version.max", 4);
 /* 1203: enforce TLS 1.0 and 1.1 downgrades as session only */
 user_pref("security.tls.version.enable-deprecated", false);
@ -724,6 +711,12 @@ user_pref("security.family_safety.mode", 0);
 * by inspecting ALL your web traffic, then leave at current default=1
 * [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/16206 ***/
 user_pref("security.cert_pinning.enforcement_level", 2);
+/* 1224: enforce CRLite [FF73+]
+ * In FF84+ it covers valid certs and in mode 2 doesn't fall back to OCSP
+ * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1429800,1670985
+ * [2] https://blog.mozilla.org/security/tag/crlite/ ***/
+user_pref("security.remote_settings.crlite_filters.enabled", true);
+user_pref("security.pki.crlite_mode", 2);

 /** MIXED CONTENT ***/
 /* 1240: enforce no insecure active content on https pages
@ -736,14 +729,21 @@ user_pref("security.mixed_content.block_display_content", true);
 user_pref("security.mixed_content.block_object_subrequest", true);
 /* 1244: enable HTTPS-Only mode [FF76+]
 * When "https_only_mode" (all windows) is true, "https_only_mode_pbm" (private windows only) is ignored
- * [WARNING] This is experimental [1] and you can't set exceptions if FPI is enabled [2] (fixed in FF83)
- * [SETTING] to add site exceptions: Page Info>Permissions>Use insecure HTTP (FF80+)
- * [SETTING] Privacy & Security>HTTPS-Only Mode (FF80+ with browser.preferences.exposeHTTPSOnly = true)
- * [1] https://bugzilla.mozilla.org/1613063 [META]
- * [2] https://bugzilla.mozilla.org/1647829 ***/
-   // user_pref("dom.security.https_only_mode", true); // [FF76+]
+ * [SETTING] to add site exceptions: Page Info>HTTPS-Only mode>On/Off/Off temporarily
+ * [SETTING] Privacy & Security>HTTPS-Only Mode
+ * [TEST] http://example.com [upgrade]
+ * [TEST] http://neverssl.org/ [no upgrade]
+ * [1] https://bugzilla.mozilla.org/1613063 [META] ***/
+user_pref("dom.security.https_only_mode", true); // [FF76+]
   // user_pref("dom.security.https_only_mode_pbm", true); // [FF80+]
-   // user_pref("dom.security.https_only_mode.upgrade_local", true); // [FF77+]
+/* 1245: enable HTTPS-Only mode for local resources [FF77+] ***/
+   // user_pref("dom.security.https_only_mode.upgrade_local", true);
+/* 1246: disable HTTP background requests [FF82+]
+ * When attempting to upgrade, if the server doesn't respond within 3 seconds, firefox
+ * sends HTTP requests in order to check if the server supports HTTPS or not.
+ * This is done to avoid waiting for a timeout which takes 90 seconds
+ * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1642387,1660945 ***/
+user_pref("dom.security.https_only_mode_send_http_background_request", false);

 /** CIPHERS [WARNING: do not meddle with your cipher suite: see the section 1200 intro]
 * These are all the ciphers still using SHA-1 and CBC which are weaker than the available alternatives. (see "Cipher Suites" in [1])
@ -757,10 +757,6 @@ user_pref("security.mixed_content.block_object_subrequest", true);
 * [2] https://en.wikipedia.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);
-/* 1263: disable DHE (Diffie-Hellman Key Exchange)
- * [1] https://www.eff.org/deeplinks/2015/10/how-to-protect-yourself-from-nsa-attacks-1024-bit-DH ***/
-   // user_pref("security.ssl3.dhe_rsa_aes_128_sha", false); // [DEFAULT: false FF78+]
-   // user_pref("security.ssl3.dhe_rsa_aes_256_sha", false); // [DEFAULT: false FF78+]
 /* 1264: disable the remaining non-modern cipher suites as of FF78 (in order of preferred by FF) ***/
   // user_pref("security.ssl3.ecdhe_ecdsa_aes_256_sha", false);
   // user_pref("security.ssl3.ecdhe_ecdsa_aes_128_sha", false);
@ -772,10 +768,8 @@ user_pref("security.mixed_content.block_object_subrequest", true);
 /** UI (User Interface) ***/
 /* 1270: display warning on the padlock for "broken security" (if 1201 is false)
 * Bug: warning padlock not indicated for subresources on a secure page! [2]
- * [STATS] SSL Labs (June 2020) reports 98.8% of sites have secure renegotiation [3]
 * [1] https://wiki.mozilla.org/Security:Renegotiation
- * [2] https://bugzilla.mozilla.org/1353705
- * [3] https://www.ssllabs.com/ssl-pulse/ ***/
+ * [2] https://bugzilla.mozilla.org/1353705 ***/
 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)
@ -787,7 +781,7 @@ user_pref("browser.ssl_override_behavior", 1);
 * [TEST] https://expired.badssl.com/ ***/
 user_pref("browser.xul.error_pages.expert_bad_cert", true);
 /* 1273: display "insecure" icon and "Not Secure" text on HTTP sites ***/
-   // user_pref("security.insecure_connection_icon.enabled", true); // [FF59+] [DEFAULT: true FF70+]
+   // user_pref("security.insecure_connection_icon.enabled", true); // [FF59+] [DEFAULT: true]
 user_pref("security.insecure_connection_text.enabled", true); // [FF60+]

 /*** [SECTION 1400]: FONTS ***/
@ -806,26 +800,21 @@ user_pref("_user.js.parrot", "1400 syntax error: the parrot's bereft of life!");
 * [1] https://wiki.mozilla.org/SVGOpenTypeFonts - iSECPartnersReport recommends to disable this ***/
 user_pref("gfx.font_rendering.opentype_svg.enabled", false);
 /* 1408: disable graphite
- * Graphite has had many critical security issues in the past, see [1]
+ * Graphite has had many critical security issues in the past [1]
 * [1] https://www.mozilla.org/security/advisories/mfsa2017-15/#CVE-2017-7778
 * [2] https://en.wikipedia.org/wiki/Graphite_(SIL) ***/
 user_pref("gfx.font_rendering.graphite.enabled", false);
 /* 1409: limit system font exposure to a whitelist [FF52+] [RESTART]
 * If the whitelist is empty, then whitelisting is considered disabled and all fonts are allowed
- * [WARNING] **DO NOT USE**: in FF80+ RFP covers this, and non-RFP users should use font vis (4618)
 * [NOTE] In FF81+ the whitelist **overrides** RFP's font visibility (see 4618)
+ * [WARNING] **DO NOT USE**: in FF80+ RFP covers this, and non-RFP users should use font vis (4618)
 * [1] https://bugzilla.mozilla.org/1121643 ***/
   // user_pref("font.system.whitelist", ""); // [HIDDEN PREF]

 /*** [SECTION 1600]: HEADERS / REFERERS
     Only *cross domain* referers need controlling: leave 1601, 1602, 1605 and 1606 alone
     ---
-            harden it a bit: set XOriginPolicy (1603) to 1 (as per the settings below)
-       harden it a bit more: set XOriginPolicy (1603) to 2 (and optionally 1604 to 1 or 2), expect breakage
-     ---
-     If you want any REAL control over referers and breakage, then use an extension. Either:
-              uMatrix: limited by scope, all requests are spoofed or not-spoofed
-       Smart Referrer: granular with source<->destination, whitelists
+     Expect some breakage: Use an extension if you need precise control
     ---
                    full URI: https://example.com:8888/foo/bar.html?id=1234
       scheme+host+port+path: https://example.com:8888/foo/bar.html
@ -836,17 +825,17 @@ user_pref("gfx.font_rendering.graphite.enabled", false);
 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); // [DEFAULT: 2]
+   // user_pref("network.http.sendRefererHeader", 2);
 /* 1602: ALL: control the amount of information to send
 * 0=send full URI (default), 1=scheme+host+port+path, 2=scheme+host+port ***/
-   // user_pref("network.http.referer.trimmingPolicy", 0); // [DEFAULT: 0]
+   // user_pref("network.http.referer.trimmingPolicy", 0);
 /* 1603: CROSS ORIGIN: control when to send a referer
 * 0=always (default), 1=only if base domains match, 2=only if hosts match
 * [SETUP-WEB] Known to cause issues with older modems/routers and some sites e.g vimeo, icloud ***/
-user_pref("network.http.referer.XOriginPolicy", 1);
+user_pref("network.http.referer.XOriginPolicy", 2);
 /* 1604: CROSS ORIGIN: control the amount of information to send [FF52+]
 * 0=send full URI (default), 1=scheme+host+port+path, 2=scheme+host+port ***/
-user_pref("network.http.referer.XOriginTrimmingPolicy", 0); // [DEFAULT: 0]
+user_pref("network.http.referer.XOriginTrimmingPolicy", 2);
 /* 1605: ALL: disable spoofing a referer
 * [WARNING] Do not set this to true, as spoofing effectively disables the anti-CSRF
 * (Cross-Site Request Forgery) protections that some sites may rely on ***/
@ -917,7 +906,7 @@ user_pref("_user.js.parrot", "2000 syntax error: the parrot's snuffed it!");
 * [1] https://www.privacytools.io/#webrtc ***/
 user_pref("media.peerconnection.enabled", false);
 /* 2002: limit WebRTC IP leaks if using WebRTC
- * In FF70+ these settings match Mode 4 (Mode 3 in older versions), see [3]
+ * In FF70+ these settings match Mode 4 (Mode 3 in older versions) [3]
 * [TEST] https://browserleaks.com/webrtc
 * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1189041,1297416,1452713
 * [2] https://wiki.mozilla.org/Media/WebRTC/Privacy
@ -952,8 +941,9 @@ user_pref("media.getusermedia.audiocapture.enabled", false);
   // user_pref("media.autoplay.default", 5);
 /* 2031: disable autoplay of HTML5 media if you interacted with the site [FF78+]
 * 0=sticky (default), 1=transient, 2=user
+ * Firefox's Autoplay Policy Documentation [PDF] is linked below via SUMO
 * [NOTE] If you have trouble with some video sites, then add an exception (see 2030)
- * [1] https://html.spec.whatwg.org/multipage/interaction.html#sticky-activation ***/
+ * [1] https://support.mozilla.org/questions/1293231 ***/
 user_pref("media.autoplay.blocking_policy", 2);

 /*** [SECTION 2200]: WINDOW MEDDLING & LEAKS / POPUPS ***/
@ -985,9 +975,6 @@ user_pref("dom.popup_allowed_events", "click dblclick");
     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.

-     [NOTE] 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
@ -1038,7 +1025,7 @@ user_pref("_user.js.parrot", "2400 syntax error: the parrot's kicked the bucket!
 * [NOTE] This will break some sites' functionality e.g. Outlook, Twitter, Facebook, Wordpress
 * This applies to onCut/onCopy/onPaste events - i.e. it requires interaction with the website
 * [WARNING] If both 'middlemouse.paste' and 'general.autoScroll' are true (at least one
- * is default false) then enabling this pref can leak clipboard content, see [1]
+ * is default false) then enabling this pref can leak clipboard content [1]
 * [1] https://bugzilla.mozilla.org/1528289 */
   // user_pref("dom.event.clipboardevents.enabled", false);
 /* 2404: disable clipboard commands (cut/copy) from "non-privileged" content [FF41+]
@ -1068,9 +1055,14 @@ user_pref("javascript.options.asmjs", false);
   // user_pref("javascript.options.ion", false);
   // user_pref("javascript.options.baselinejit", false);
   // user_pref("javascript.options.jit_trustedprincipals", true); // [FF75+] [HIDDEN PREF]
-/* 2422: disable WebAssembly [FF52+] [SETUP-PERF]
- * [NOTE] In FF71+ this no longer affects extensions (1576254)
- * [1] https://developer.mozilla.org/docs/WebAssembly ***/
+/* 2422: disable WebAssembly [FF52+]
+ * Vulnerabilities have increasingly been found, including those known and fixed
+ * in native programs years ago [2]. WASM has powerful low-level access, making
+ * certain attacks (brute-force) and vulnerabilities more possible
+ * [STATS] ~0.2% of websites, about half of which are for crytopmining / malvertising [2][3]
+ * [1] https://developer.mozilla.org/docs/WebAssembly
+ * [2] https://spectrum.ieee.org/tech-talk/telecom/security/more-worries-over-the-security-of-web-assembly
+ * [3] https://www.zdnet.com/article/half-of-the-websites-using-webassembly-use-it-for-malicious-purposes ***/
 user_pref("javascript.options.wasm", false);
 /* 2429: enable (limited but sufficient) window.opener protection [FF65+]
 * Makes rel=noopener implicit for target=_blank in anchor and area elements when no rel attribute is set ***/
@ -1082,7 +1074,7 @@ user_pref("_user.js.parrot", "2500 syntax error: the parrot's shuffled off 'is m
 * 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]
+ * [NOTE] From FF52+ Battery Status API is only available in chrome/privileged code [1]
 * [1] https://bugzilla.mozilla.org/1313580 ***/
   // user_pref("dom.battery.enabled", false);
 /* 2505: disable media device enumeration [FF29+]
@ -1151,10 +1143,6 @@ user_pref("devtools.debugger.remote-enabled", false); // [DEFAULT: false]
 /* 2611: disable middle mouse click opening links from clipboard
 * [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/10089 ***/
 user_pref("middlemouse.contentLoadURL", false);
-/* 2614: limit HTTP redirects (this does not control redirects with HTML meta tags or JS)
- * [NOTE] A low setting of 5 or under will probably break some sites (e.g. gmail logins)
- * To control HTML Meta tag and JS redirects, use an extension. Default is 20 ***/
-user_pref("network.http.redirection-limit", 10);
 /* 2615: disable websites overriding Firefox's keyboard shortcuts [FF58+]
 * 0 (default) or 1=allow, 2=block
 * [SETTING] to add site exceptions: Page Info>Permissions>Override Keyboard Shortcuts ***/
@ -1195,6 +1183,13 @@ user_pref("browser.display.use_system_colors", false); // [DEFAULT: false]
 * for these will show/use their correct 3rd party origin
 * [1] https://groups.google.com/forum/#!topic/mozilla.dev.platform/BdFOMAuCGW8/discussion */
 user_pref("permissions.delegation.enabled", false);
+/* 2624: enable "window.name" protection [FF82+]
+ * If a new page from another domain is loaded into a tab, then window.name is set to an empty string. The original
+ * string is restored if the tab reverts back to the original page. This change prevents some cross-site attacks ***/
+user_pref("privacy.window.name.update.enabled", true); // [DEFAULT: true FF86+]
+/* 2625: disable bypassing 3rd party extension install prompts [FF82+]
+ * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1659530,1681331 ***/
+user_pref("extensions.postDownloadThirdPartyPrompt", false);

 /** DOWNLOADS ***/
 /* 2650: discourage downloading to desktop
@ -1254,14 +1249,13 @@ user_pref("security.dialog_enable_delay", 700);
 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-WEB]
 * 0=Accept cookies and site data, 1=(Block) All third-party cookies, 2=(Block) All cookies,
- * 3=(Block) Cookies from unvisited websites, 4=(Block) Cross-site and social media trackers (FF63+) (default FF69+)
+ * 3=(Block) Cookies from unvisited websites, 4=(Block) Cross-site and social media trackers (default)
 * [NOTE] You can set exceptions under site permissions or use an extension
 * [NOTE] Enforcing category to custom ensures ETP related prefs are always honored
 * [SETTING] Privacy & Security>Enhanced Tracking Protection>Custom>Cookies ***/
 user_pref("network.cookie.cookieBehavior", 1);
 user_pref("browser.contentblocking.category", "custom");
-/* 2702: set third-party cookies (i.e ALL) (if enabled, see 2701) to session-only
-   and (FF58+) set third-party non-secure (i.e HTTP) cookies to session-only
+/* 2702: set third-party cookies (if enabled, see 2701) 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/ ***/
@ -1276,8 +1270,10 @@ user_pref("network.cookie.thirdparty.nonsecureSessionOnly", true); // [FF58+]
 * [WARNING] This will break a LOT of sites' functionality AND extensions!
 * You are better off using an extension for more granular control ***/
   // user_pref("dom.storage.enabled", false);
-/* 2730: disable offline cache ***/
-user_pref("browser.cache.offline.enable", false);
+/* 2730: enforce no offline cache storage (appCache)
+ * The API is easily fingerprinted, use the "storage" pref instead ***/
+   // user_pref("browser.cache.offline.enable", false);
+user_pref("browser.cache.offline.storage.enable", false); // [FF71+] [DEFAULT: false FF84+]
 /* 2740: disable service worker cache and cache storage
 * [NOTE] We clear service worker cache on exiting Firefox (see 2803)
 * [1] https://w3c.github.io/ServiceWorker/#privacy ***/
@ -1293,6 +1289,8 @@ user_pref("browser.cache.offline.enable", false);
 /* 2755: disable Storage Access API [FF65+]
 * [1] https://developer.mozilla.org/en-US/docs/Web/API/Storage_Access_API ***/
   // user_pref("dom.storage_access.enabled", false);
+/* 2760: enable Local Storage Next Generation (LSNG) [FF65+] ***/
+user_pref("dom.storage.next_gen", true);

 /*** [SECTION 2800]: SHUTDOWN
     You should set the values to what suits you best.
@ -1348,116 +1346,108 @@ user_pref("privacy.cpd.siteSettings", false); // Site Preferences
 user_pref("privacy.sanitize.timeSpan", 0);

 /*** [SECTION 4000]: FPI (FIRST PARTY ISOLATION)
- 4001: 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+)
- ** 1492607 - isolate postMessage with targetOrigin "*" (requires 4002) (FF65+)
- ** 1542309 - isolate top-level domain URLs when host is in the public suffix list (FF68+)
- ** 1506693 - isolate pdfjs range-based requests (FF68+)
- ** 1330467 - isolate site permissions (FF69+)
- ** 1534339 - isolate IPv6 (FF73+)
- 4003: NETWORK PARTITON
- ** 1647732 - isolate font cache (FF80+)
- ** 1649673 - isolate speculative connections (FF80+)
+   1278037 - indexedDB (FF51+)
+   1277803 - favicons (FF52+)
+   1264562 - OCSP cache (FF52+)
+   1268726 - Shared Workers (FF52+)
+   1316283 - SSL session cache (FF52+)
+   1317927 - media cache (FF53+)
+   1323644 - HSTS and HPKP (FF54+)
+   1334690 - HTTP Alternative Services (FF54+)
+   1334693 - SPDY/HTTP2 (FF55+)
+   1337893 - DNS cache (FF55+)
+   1344170 - blob: URI (FF55+)
+   1300671 - data:, about: URLs (FF55+)
+   1473247 - IP addresses (FF63+)
+   1492607 - postMessage with targetOrigin "*" (requires 4002) (FF65+)
+   1542309 - top-level domain URLs when host is in the public suffix list (FF68+)
+   1506693 - pdfjs range-based requests (FF68+)
+   1330467 - site permissions (FF69+)
+   1534339 - IPv6 (FF73+)
 ***/
 user_pref("_user.js.parrot", "4000 syntax error: the parrot's pegged out");
 /* 4001: enable First Party Isolation [FF51+]
 * [SETUP-WEB] May break cross-domain logins and site functionality until perfected
- * [1] https://bugzilla.mozilla.org/1260931
- * [2] https://bugzilla.mozilla.org/1299996 [META] ***/
+ * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1260931,1299996 ***/
 user_pref("privacy.firstparty.isolate", true);
 /* 4002: enforce FPI restriction for window.opener [FF54+]
 * [NOTE] Setting this to false may reduce the breakage in 4001
 * FF65+ blocks postMessage with targetOrigin "*" if originAttributes don't match. But
- * to reduce breakage it ignores the 1st-party domain (FPD) originAttribute, see [2],[3]
+ * to reduce breakage it ignores the 1st-party domain (FPD) originAttribute [2][3]
 * The 2nd pref removes that limitation and will only allow communication if FPDs also match.
 * [1] https://bugzilla.mozilla.org/1319773#c22
 * [2] https://bugzilla.mozilla.org/1492607
 * [3] https://developer.mozilla.org/en-US/docs/Web/API/Window/postMessage ***/
   // user_pref("privacy.firstparty.isolate.restrict_opener_access", true); // [DEFAULT: true]
   // user_pref("privacy.firstparty.isolate.block_post_message", true);
-/* 4003: enable site partitioning (FF78+)
- * [1] https://bugzilla.mozilla.org/1590107 [META] */
-user_pref("privacy.partition.network_state", true);
+/* 4003: enable scheme with FPI [FF78+]
+ * [NOTE] Experimental: existing data and site permissions are incompatible
+ * and some site exceptions may not work e.g. HTTPS-only mode (see 1244) ***/
+   // user_pref("privacy.firstparty.isolate.use_site", true);

 /*** [SECTION 4500]: RFP (RESIST FINGERPRINTING)
-   This master switch will be used for a wide range of items, many of which will
-   **override** existing prefs from FF55+, often providing a **better** solution
+   RFP covers a wide range of ongoing fingerprinting solutions.
+   It is an all-or-nothing buy in: you cannot pick and choose what parts you want

-   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
+   [WARNING] Do NOT use extensions to alter RFP protected metrics
+   [WARNING] Do NOT use prefs in section 4600 with RFP as they can interfere

- ** 418986 - limit window.screen & CSS media queries leaking identifiable info (FF41+)
-      [NOTE] Info only: 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
+ FF41+
+    418986 - limit window.screen & CSS media queries leaking identifiable info
      [TEST] https://arkenfox.github.io/TZP/tzp.html#screen
- ** 1281949 - spoof screen orientation (FF50+)
- ** 1281963 - hide the contents of navigator.plugins and navigator.mimeTypes (FF50+)
-      FF53: Fixes GetSupportedNames in nsMimeTypeArray and nsPluginArray (1324044)
- ** 1330890 - spoof timezone as UTC 0 (FF55+)
-      FF58: Date.toLocaleFormat deprecated (818634)
-      FF60: Date.toLocaleDateString and Intl.DateTimeFormat fixed (1409973)
- ** 1360039 - spoof navigator.hardwareConcurrency as 2 (see 4601) (FF55+)
-      This spoof *shouldn't* affect core chrome/Firefox performance
- ** 1217238 - reduce precision of time exposed by javascript (FF55+)
- ** 1369303 - spoof/disable performance API (see 2410-deprecated, 4602, 4603) (FF56+)
- ** 1333651 & 1383495 & 1396468 - spoof User Agent & Navigator API (see section 4700) (FF56+)
-      FF56: Version: rounded down to the nearest multiple of 10
-      FF57: Version: match current ESR (1393283, 1418672, 1418162, 1511763)
-      FF59: OS: Windows, OSX, Android, or Linux (to reduce breakage) (1404608)
-      FF66: OS: HTTP Headers reduced to Windows or Android (1509829)
-      FF68: OS: updated to Windows 10, OS 10.14, and Android 8.1 (1511434)
-      FF78: OS: updated to OS 10.15 and Android 9.0 (1635011)
- ** 1369319 - disable device sensor API (see 4604) (FF56+)
- ** 1369357 - disable site specific zoom (see 4605) (FF56+)
- ** 1337161 - hide gamepads from content (see 4606) (FF56+)
- ** 1372072 - spoof network information API as "unknown" when dom.netinfo.enabled = true (see 4607) (FF56+)
- ** 1333641 - reduce fingerprinting in WebSpeech API (see 4608) (FF56+)
- ** 1372069 & 1403813 & 1441295 - block geolocation requests (same as denying a site permission) (see 0201, 0202) (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+)
+ FF50+
+   1281949 - spoof screen orientation
+   1281963 - hide the contents of navigator.plugins and navigator.mimeTypes (FF50+)
+ FF55+
+   1330890 - spoof timezone as UTC 0
+   1360039 - spoof navigator.hardwareConcurrency as 2 (see 4601)
+   1217238 - reduce precision of time exposed by javascript
+ FF56+
+   1369303 - spoof/disable performance API (see 4602, 4603)
+   1333651 - spoof User Agent & Navigator API (see section 4700)
+      JS: FF78+ the version is spoofed as 78, and the OS as Windows 10, OS 10.15, Android 9, or Linux
+      HTTP Headers: spoofed as Windows or Android
+   1369319 - disable device sensor API (see 4604)
+   1369357 - disable site specific zoom (see 4605)
+   1337161 - hide gamepads from content (see 4606)
+   1372072 - spoof network information API as "unknown" when dom.netinfo.enabled = true (see 4607)
+   1333641 - reduce fingerprinting in WebSpeech API (see 4608)
+ FF57+
+   1369309 - spoof media statistics (see 4610)
+   1382499 - reduce screen co-ordinate fingerprinting in Touch API (see 4611)
+   1217290 & 1409677 - enable fingerprinting resistance for WebGL (see 2010-12)
+   1382545 - reduce fingerprinting in Animation API
+   1354633 - limit MediaError.message to a whitelist
+   1382533 - enable fingerprinting resistance for Presentation API
      This blocks exposure of local IP Addresses via mDNS (Multicast DNS)
- **  967895 - spoof canvas and enable site permission prompt before allowing canvas data extraction (FF58+)
-      FF59: Added to site permissions panel (1413780) Only prompt when triggered by user input (1376865)
- ** 1372073 - spoof/block fingerprinting in MediaDevices API (FF59+)
+ FF58+
+    967895 - spoof canvas and enable site permission prompt before allowing canvas data extraction
+ FF59+
+   1372073 - spoof/block fingerprinting in MediaDevices API
      Spoof: enumerate devices reports one "Internal Camera" and one "Internal Microphone" if
             media.navigator.enabled is true (see 2505 which we chose to keep disabled)
      Block: suppresses the ondevicechange event (see 4612)
- ** 1039069 - warn when language prefs are set to non en-US (see 0210, 0211) (FF59+)
- ** 1222285 & 1433592 - spoof keyboard events and suppress keyboard modifier events (FF59+)
+   1039069 - warn when language prefs are set to non en-US (see 0210, 0211)
+   1222285 & 1433592 - spoof keyboard events and suppress keyboard modifier events
      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+)
- ** 1479239 - return "no-preference" with prefers-reduced-motion (see 4614) (FF63+)
- ** 1363508 - spoof/suppress Pointer Events (see 4615) (FF64+)
+ FF60-67
+   1337157 - disable WebGL debug renderer info (see 4613) (FF60+)
+   1459089 - disable OS locale in HTTP Accept-Language headers (ANDROID) (FF62+)
+   1479239 - return "no-preference" with prefers-reduced-motion (see 4614) (FF63+)
+   1363508 - spoof/suppress Pointer Events (see 4615) (FF64+)
      FF65: pointerEvent.pointerid (1492766)
- ** 1485266 - disable exposure of system colors to CSS or canvas (see 4616) (FF67+)
- ** 1407366 - enable inner window letterboxing (see 4504) (FF67+)
- ** 1494034 - return "light" with prefers-color-scheme (see 4617) (FF67+)
-      [1] https://developer.mozilla.org/en-US/docs/Web/CSS/@media/prefers-color-scheme
- ** 1564422 - spoof audioContext outputLatency (FF70+)
- ** 1595823 - spoof audioContext sampleRate (FF72+)
- ** 1607316 - spoof pointer as coarse and hover as none (ANDROID) (FF74+)
- ** 1621433 - randomize canvas (previously FF58+ returned an all-white canvas) (FF78+)
- ** 1653987 - limit font visibility to bundled and "Base Fonts" (see 4618) (non-ANDROID) (FF80+)
+   1485266 - disable exposure of system colors to CSS or canvas (see 4616) (FF67+)
+   1407366 - enable inner window letterboxing (see 4504) (FF67+)
+   1494034 - return "light" with prefers-color-scheme (see 4617) (FF67+)
+ FF68-77
+   1564422 - spoof audioContext outputLatency (FF70+)
+   1595823 - spoof audioContext sampleRate (FF72+)
+   1607316 - spoof pointer as coarse and hover as none (ANDROID) (FF74+)
+ FF78+
+   1621433 - randomize canvas (previously FF58+ returned an all-white canvas) (FF78+)
+   1653987 - limit font visibility to bundled and "Base Fonts" (see 4618) (non-ANDROID) (FF80+)
+   1461454 - spoof smooth=true and powerEfficient=false for supported media in MediaCapabilities (FF82+)
 ***/
 user_pref("_user.js.parrot", "4500 syntax error: the parrot's popped 'is clogs");
 /* 4501: enable privacy.resistFingerprinting [FF41+]
@ -1469,27 +1459,26 @@ user_pref("privacy.resistFingerprinting", true);
 /* 4502: set new window sizes to round to hundreds [FF55+] [SETUP-CHROME]
 * Width will round down to multiples of 200s and height to 100s, to fit your screen.
 * The override values are a starting point to round from if you want some control
- * [1] https://bugzilla.mozilla.org/1330882
- * [2] https://hardware.metrics.mozilla.com/ ***/
+ * [1] https://bugzilla.mozilla.org/1330882 ***/
   // user_pref("privacy.window.maxInnerWidth", 1000);
   // user_pref("privacy.window.maxInnerHeight", 1000);
 /* 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
+ * [NOTE] To allow extensions to work on AMO, you also need 2662
 * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1384330,1406795,1415644,1453988 ***/
 user_pref("privacy.resistFingerprinting.block_mozAddonManager", true); // [HIDDEN PREF]
 /* 4504: enable RFP letterboxing [FF67+]
- * Dynamically resizes the inner window (FF67; 200w x100h: FF68+; stepped ranges) by applying letterboxing,
- * using dimensions which waste the least content area, If you use the dimension pref, then it will only apply
- * those resolutions. The format is "width1xheight1, width2xheight2, ..." (e.g. "800x600, 1000x1000, 1600x900")
- * [SETUP-WEB] This does NOT require RFP (see 4501) **for now**, so if you're not using 4501, or you are but you're
- * not taking anti-fingerprinting seriously and a little visual change upsets you, then feel free to flip this pref
+ * Dynamically resizes the inner window by applying margins in stepped ranges [2]
+ * If you use the dimension pref, then it will only apply those resolutions. The format is
+ * "width1xheight1, width2xheight2, ..." (e.g. "800x600, 1000x1000, 1600x900")
+ * [SETUP-WEB] This does NOT require RFP (see 4501) **for now**, so if you're not using 4501, or you are but
+ * dislike margins being applied, then flip this pref, keeping in mind that it is effectively fingerprintable
 * [WARNING] The dimension pref is only meant for testing, and we recommend you DO NOT USE it
- * [1] https://bugzilla.mozilla.org/1407366 ***/
+ * [1] https://bugzilla.mozilla.org/1407366
+ * [2] https://hg.mozilla.org/mozilla-central/rev/6d2d7856e468#l2.32 ***/
 user_pref("privacy.resistFingerprinting.letterboxing", true); // [HIDDEN PREF]
   // user_pref("privacy.resistFingerprinting.letterboxing.dimensions", ""); // [HIDDEN PREF]
 /* 4510: disable showing about:blank as soon as possible during startup [FF60+]
- * When default true (FF62+) this no longer masks the RFP chrome resizing activity
+ * When default true this no longer masks the RFP chrome resizing activity
 * [1] https://bugzilla.mozilla.org/1448423 ***/
 user_pref("browser.startup.blankWindow", false);
 /* 4520: disable chrome animations [FF77+] [RESTART]
@ -1497,15 +1486,7 @@ user_pref("browser.startup.blankWindow", false);
 user_pref("ui.prefersReducedMotion", 1); // [HIDDEN PREF]

 /*** [SECTION 4600]: RFP ALTERNATIVES
-   * non-RFP users:
-       Enable the whole section (see the SETUP tag below)
-   * RFP users:
-       Make sure these are reset in about:config. They are redundant. In fact, some
-       even cause RFP to not behave as you would expect and alter your fingerprint
-   * ESR RFP users:
-       Reset those *up to and including* your version. Add those *after* your version
-       as active prefs in your overrides. This is assuming that the patch wasn't also
-       backported to Firefox ESR. Backporting RFP patches to ESR is rare.
+     [WARNING] Do NOT use prefs in this section with RFP as they can interfere
 ***/
 user_pref("_user.js.parrot", "4600 syntax error: the parrot's crossed the Jordan");
 /* [SETUP-non-RFP] Non-RFP users replace the * with a slash on this line to enable these
@ -1596,7 +1577,7 @@ user_pref("ui.use_standins_for_native_colors", true);
 user_pref("ui.systemUsesDarkTheme", 0); // [HIDDEN PREF]
 // FF80+
 // 4618: limit font visbility (non-ANDROID) [FF79+]
-   // Uses hardcoded lists with two parts: kBaseFonts + kLangPackFonts, see [1]
+   // Uses hardcoded lists with two parts: kBaseFonts + kLangPackFonts [1]
   // 1=only base system fonts, 2=also fonts from optional language packs, 3=also user-installed fonts
   // [NOTE] Bundled fonts are auto-allowed
   // [1] https://searchfox.org/mozilla-central/search?path=StandardFonts*.inc
@ -1604,32 +1585,22 @@ user_pref("layout.css.font-visibility.level", 1);
 // * * * /
 // ***/

-/*** [SECTION 4700]: RFP ALTERNATIVES (NAVIGATOR / USER AGENT (UA) SPOOFING)
-     This is FYI ONLY. These prefs are INSUFFICIENT(a) on their own, you need
-     to use RFP (4500) or an extension, in which case they become POINTLESS.
-     (a) Many of the components that make up your UA can be derived by other means.
-         And when those values differ, you provide more bits and raise entropy.
-         Examples of leaks include workers, 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
+/*** [SECTION 4700]: RFP ALTERNATIVES (USER AGENT SPOOFING)
+     These prefs are insufficient and leak. Use RFP and **nothing else**
+     - Many of the user agent components can be derived by other means. When those
+       values differ, you provide more bits and raise entropy. Examples include
+       workers, iframes, headers, tcp/ip attributes, feature detection, and many more
+     - Web extensions also lack APIs to fully protect spoofing
 ***/
 user_pref("_user.js.parrot", "4700 syntax error: the parrot's taken 'is last bow");
-/* 4701: navigator.userAgent ***/
-   // user_pref("general.useragent.override", ""); // [HIDDEN PREF]
-/* 4702: navigator.buildID
- * Revealed build time down to the second. In FF64+ it now returns a fixed timestamp
- * [1] https://bugzilla.mozilla.org/583181
- * [2] https://www.fxsitecompat.com/en-CA/docs/2018/navigator-buildid-now-returns-a-fixed-timestamp/ ***/
-   // user_pref("general.buildID.override", ""); // [HIDDEN PREF]
-/* 4703: navigator.appName ***/
+/* 4701: navigator DOM object overrides
+ * [WARNING] DO NOT USE ***/
   // 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.buildID.override", ""); // [HIDDEN PREF]
   // user_pref("general.oscpu.override", ""); // [HIDDEN PREF]
+   // user_pref("general.platform.override", ""); // [HIDDEN PREF]
+   // user_pref("general.useragent.override", ""); // [HIDDEN PREF]

 /*** [SECTION 5000]: PERSONAL
     Non-project related but useful. If any of these interest you, add them to your overrides ***/
@ -1691,99 +1662,12 @@ user_pref("_user.js.parrot", "9999 syntax error: the parrot's deprecated!");
   // [-] https://bugzilla.mozilla.org/1603712
 user_pref("intl.charset.fallback.override", "windows-1252");
 // * * * /
-// ***/
-
-/* ESR68.x still uses all the following prefs
-// [NOTE] replace the * with a slash in the line above to re-enable them
-// FF69
-// 1405: disable WOFF2 (Web Open Font Format) [FF35+]
-   // [-] https://bugzilla.mozilla.org/1556991
-   // user_pref("gfx.downloadable_fonts.woff2.enabled", false);
-// 1802: enforce click-to-play for plugins
-   // [-] https://bugzilla.mozilla.org/1519434
-user_pref("plugins.click_to_play", true); // [DEFAULT: true FF25+]
-// 2033: disable autoplay for muted videos [FF63+] - replaced by 'media.autoplay.default' options (2030)
-   // [-] https://bugzilla.mozilla.org/1562331
-   // user_pref("media.autoplay.allow-muted", false);
-// * * * /
-// FF71
-// 2608: disable WebIDE and ADB extension download
-   // [1] https://trac.torproject.org/projects/tor/ticket/16222
-   // [-] https://bugzilla.mozilla.org/1539462
-user_pref("devtools.webide.enabled", false); // [DEFAULT: false FF70+]
-user_pref("devtools.webide.autoinstallADBExtension", false); // [FF64+]
-// 2731: enforce websites to ask to store data for offline use
-   // [1] https://support.mozilla.org/questions/1098540
-   // [2] https://bugzilla.mozilla.org/959985
-   // [-] https://bugzilla.mozilla.org/1574480
-user_pref("offline-apps.allow_by_default", false);
-// * * * /
-// FF72
-// 0105a: disable Activity Stream telemetry
-   // [-] https://bugzilla.mozilla.org/1597697
-user_pref("browser.newtabpage.activity-stream.telemetry.ping.endpoint", "");
-// 0330: disable Hybdrid Content telemetry
-   // [-] https://bugzilla.mozilla.org/1520491
-user_pref("toolkit.telemetry.hybridContent.enabled", false); // [FF59+]
-// 2720: enforce IndexedDB (IDB) as enabled
-   // IDB is required for extensions and Firefox internals (even before FF63 in [1])
-   // To control *website* IDB data, control allowing cookies and service workers, or use
-   // Temporary Containers. To mitigate *website* IDB, FPI helps (4001), and/or sanitize
-   // on close (Offline Website Data, see 2800) or on-demand (Ctrl-Shift-Del), or automatically
-   // via an extension. Note that IDB currently cannot be sanitized by host.
-   // [1] https://blog.mozilla.org/addons/2018/08/03/new-backend-for-storage-local-api/
-   // [-] https://bugzilla.mozilla.org/1488583
-user_pref("dom.indexedDB.enabled", true); // [DEFAULT: true]
-// * * * /
-// FF74
-// 0203: use Mozilla geolocation service instead of Google when geolocation is enabled
-   // Optionally enable logging to the console (defaults to false)
-   // [-] https://bugzilla.mozilla.org/1613627
-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]
-// 1704: set behaviour on "+ Tab" button to display container menu [FF53+] [SETUP-CHROME]
-   // 0=no menu (default), 1=show when clicked, 2=show on long press
-   // [1] https://bugzilla.mozilla.org/1328756
-   // [-] https://bugzilla.mozilla.org/1606265
-user_pref("privacy.userContext.longPressBehavior", 2);
-// 2012: limit WebGL
-   // [-] https://bugzilla.mozilla.org/1477756
-user_pref("webgl.disable-extensions", true);
-// * * * /
-// FF76
-// 0401: sanitize blocklist url
-   // [2] https://trac.torproject.org/projects/tor/ticket/16931
-   // [-] https://bugzilla.mozilla.org/1618188
-user_pref("extensions.blocklist.url", "https://blocklists.settings.services.mozilla.com/v1/blocklist/3/%APP_ID%/%APP_VERSION%/");
-// 2201: prevent websites from disabling new window features
-   // [-] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1507375,1660524
-user_pref("dom.disable_window_open_feature.close", true);
-user_pref("dom.disable_window_open_feature.location", true); // [DEFAULT: true]
-user_pref("dom.disable_window_open_feature.menubar", true);
-user_pref("dom.disable_window_open_feature.minimizable", true);
-user_pref("dom.disable_window_open_feature.personalbar", true); // bookmarks toolbar
-user_pref("dom.disable_window_open_feature.resizable", true); // [DEFAULT: true]
-user_pref("dom.disable_window_open_feature.status", true); // [DEFAULT: true]
-user_pref("dom.disable_window_open_feature.titlebar", true);
-user_pref("dom.disable_window_open_feature.toolbar", true);
-// * * * /
-// FF77
-// 0850e: disable location bar one-off searches [FF51+]
-   // [-] https://bugzilla.mozilla.org/1628926
-   // user_pref("browser.urlbar.oneOffSearches", false);
-// 2605: block web content in file processes [FF55+]
-   // [SETUP-WEB] You may want to disable this for corporate or developer environments
-   // [1] https://bugzilla.mozilla.org/1343184
-   // [-] https://bugzilla.mozilla.org/1603007
-user_pref("browser.tabs.remote.allowLinkedWebInFileUriProcess", false);
-// * * * /
-// FF78
-// 2031: disable autoplay of HTML5 media if you interacted with the site [FF66+] - replaced by 'media.autoplay.blocking_policy'
-   // [-] https://bugzilla.mozilla.org/1509933
-user_pref("media.autoplay.enabled.user-gestures-needed", false);
-// 5000's: disable chrome animations - replaced FF77+ by 'ui.prefersReducedMotion' (4520)
-   // [-] https://bugzilla.mozilla.org/1640501
-   // user_pref("toolkit.cosmeticAnimations.enabled", false); // [FF55+]
+// FF82
+// 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
+   // [-] https://bugzilla.mozilla.org/1619926
+user_pref("browser.search.geoSpecificDefaults", false);
+user_pref("browser.search.geoSpecificDefaults.url", "");
 // * * * /
 // ***/
Author	SHA1	Message	Date
Thorin-Oakenpants	fa78c53114	v85	2021-01-28 03:13:36 +00:00
Thorin-Oakenpants	2f6b14ab6e	1201: add error code, fixes #1094	2021-01-26 19:58:57 +00:00
Thorin-Oakenpants	2dd455ef83	network.http.redirection-limit, fixes #1100	2021-01-26 19:39:33 +00:00
Thorin-Oakenpants	306610da8e	remove 2614, see #1100	2021-01-26 19:37:54 +00:00
earthlng	59ac1727f7	v4.14 - check for TLS1.2 (#1097 )	2021-01-22 12:15:12 +00:00
Thorin-Oakenpants	c974b3252d	move [STATS] from 1270 to 1201, #1094	2021-01-22 12:10:15 +00:00
Thorin-Oakenpants	480933484f	2624: windows.name default FF86+ https://bugzilla.mozilla.org/1685089	2021-01-21 11:17:16 +00:00
earthlng	0cbd8a13a3	Update updater.bat	2021-01-19 17:17:03 +00:00
earthlng	ae6c76fe54	v4.13 - fix TLS issue with PowerShell	2021-01-19 17:07:39 +00:00
Thorin-Oakenpants	1f098f2eaf	start 85-alpha, also fix #1090	2021-01-17 23:04:37 +00:00
earthlng	11977e7017	v2.4 - add strlen check for prefs.js cmd.exe has a command line length limit of 8192 characters. Abort if prefs.js contains strings that would get dropped while recreating the new prefs.js.	2021-01-17 15:27:50 +00:00
Thorin-Oakenpants	27dd6aa62d	84 final	2021-01-05 13:13:52 +00:00
earthlng	c570e4fdbd	Update troubleshooter.js	2020-12-30 15:12:07 +00:00
earthlng	da58f84fa6	Update troubleshooter.js	2020-12-30 15:06:49 +00:00
Thorin-Oakenpants	755a45505f	snippets providers `browser.newtabpage.activity-stream.asrouter.providers.snippets` These (which landed in FF64 with snippets above) are not in the user.js, so why bother with the snippet one - `browser.newtabpage.activity-stream.asrouter.providers.cfr` - `browser.newtabpage.activity-stream.asrouter.providers.onboarding` also these aren't in the user.js - `browser.newtabpage.activity-stream.asrouter.providers.cfr-fxa` - `browser.newtabpage.activity-stream.asrouter.providers.message-groups` - `browser.newtabpage.activity-stream.asrouter.providers.messaging-experiments` - `browser.newtabpage.activity-stream.asrouter.providers.whats-new-panel` There are no privacy concerns here. At the end of the day, what Firefox connects to and sends is E2EE and only used locally in non-web content: and you have other prefs and a UI to disable them from being displayed	2020-12-30 10:25:26 +00:00
Thorin-Oakenpants	9d74cb9526	remove useless snippet pref	2020-12-30 10:17:35 +00:00
Thorin-Oakenpants	8c9d0bbe72	harden cross-domain referers, closes #1077	2020-12-27 05:01:33 +00:00
Thorin-Oakenpants	0152b38b8b	add override recipes link to readme steps	2020-12-25 16:06:32 +00:00
Thorin-Oakenpants	e6cf90146a	add override recipes	2020-12-25 15:55:01 +00:00
earthlng	63d1258f2e	updater.sh v2.9 rollout the latest changes	2020-12-25 14:03:40 +00:00
ray851107	46bab27f94	updater.sh: support custom script names (#1075 ) thanks @ray851107	2020-12-25 14:02:35 +00:00
Thorin-Oakenpants	2cfbba1472	search-to-tab: FF85+	2020-12-19 07:23:13 +00:00
earthlng	c980bda695	Update troubleshooter.js oops	2020-12-16 14:43:46 +00:00
earthlng	feaa1c3e99	prefs update `browser.storageManager.enabled` -- removed in FF61 (1428306) `security.csp.experimentalEnabled` -- removed in FF68 (1386214) `gfx.downloadable_fonts.woff2.enabled` -- removed in FF69 (1556991) `plugin.sessionPermissionNow.intervalInMinutes` -- removed in FF70 (1581664) `plugin.defaultXpi.state` -- removed in FF72 (1596090) `geo.wifi.uri` -- renamed to `geo.provider.network.url` in FF74 (1613627) `browser.tabs.remote.allowLinkedWebInFileUriProcess` -- removed in FF77 (1603007)	2020-12-16 14:40:42 +00:00
Thorin-Oakenpants	aa1c2145bb	layout.css.visited_links_enabled	2020-12-09 09:30:21 +00:00
Thorin-Oakenpants	335ee84540	remove layout.css.visited_links_enabled, #933 This no longer has any affect since FF77+: see https://bugzilla.mozilla.org/1632765	2020-12-09 09:26:50 +00:00
Thorin-Oakenpants	5c37d50f4e	tidy - remove useless `see` word for reference links - fixup 0701 - "do not play nice" is not measurable - don't reference to self as a source: people can just search "VPN leak Ipv6" or something	2020-12-07 19:34:14 +00:00
Thorin-Oakenpants	77abf35761	tidy - shrink and remove outdated info from section 0300 header - combine some bugzillas - drop some references - 1647829 for HTTPS-Only mode - hardware metrics: not going to implicitly encourage users to use this pref or tell them what sizes to use - update [STATS] - also remove TLS [STATS].. stats on TLS 1.0 and 1.1 are irrelevant: the default is now TLS 1.2+ - single CRLite reference for all blog articles - save 588 bytes so all you bastards can theoretically load Firefox just that tiny bit faster	2020-12-06 21:09:07 +00:00
Thorin-Oakenpants	fa85c9da5b	fixup double word	2020-11-23 10:46:30 +00:00
Thorin-Oakenpants	cf53982086	1244: CRLite, closes #1065	2020-11-22 18:15:25 +00:00
Thorin-Oakenpants	91cbc1e09a	HTTPS-Only mode, closes #1047	2020-11-22 17:59:44 +00:00
Thorin-Oakenpants	a7e4268d8b	2730 appCache, closes #1055	2020-11-22 17:25:33 +00:00
Thorin-Oakenpants	699eacf1fd	add FPI scheme, closes #1066 (#1067 )	2020-11-22 17:21:31 +00:00
Thorin-Oakenpants	0189438e46	start 84-alpha	2020-11-22 17:11:31 +00:00
Thorin-Oakenpants	94712f59a3	83 final	2020-11-22 17:05:34 +00:00
Thorin-Oakenpants	ef93a754ce	warnings always come after notes	2020-11-21 01:49:19 +00:00
earthlng	c6ddda1aa3	Update troubleshooter.js - add `privacy.window.name.update.enabled` - remove `media.autoplay.enabled` (removed in FF63) - remove `dom.indexedDB.enabled` (removed in FF72)	2020-11-17 19:17:59 +00:00
Thorin-Oakenpants	ccbca41e2d	start 83 alpha, fixup 1244 setting info `browser.preferences.exposeHTTPSOnly` is now default true	2020-11-13 01:03:29 +00:00
Thorin-Oakenpants	5b0d173078	82 final	2020-11-13 00:55:45 +00:00
Thorin-Oakenpants	d6186819f4	domIntersectionObserver it was removed after 81-beta was released	2020-11-11 18:42:29 +00:00
Thorin-Oakenpants	ea0eb85404	82-beta	2020-11-11 18:23:00 +00:00
Thorin-Oakenpants	8dc43cfdc2	RFP 82+ changes Note - this is not the same as 2517 which disables the API - RFP does not determine what is supported or not supported: so that entropy remains - with or without RFP, if the media config is not supported it returns false,false (so there is nothing to spoof here)	2020-11-11 18:20:13 +00:00
Thorin-Oakenpants	f7bee988de	0517: add creditCards.available / defense-in-depth see https://github.com/arkenfox/user.js/issues/1038#issuecomment-713643850	2020-11-11 18:08:06 +00:00
Thorin-Oakenpants	f2fe7f02b0	add 2624: window.name protection, fixes #1012	2020-11-11 16:59:27 +00:00
Thorin-Oakenpants	accef19af4	add LSNG, fixes #1059	2020-11-11 16:27:43 +00:00
Thorin-Oakenpants	910d7004c6	release info, fixes #1042 now we have somewhere to add things like HTTPS-Only Mode, appCache, secure downloads when we make changes that impact ESR	2020-11-11 16:12:57 +00:00
Thorin-Oakenpants	07cccd5386	remove 4003: partition, see #1051 (#1057 )	2020-11-02 17:05:40 +00:00
Thorin-Oakenpants	ac52886ea8	2422 WASM, add reason for disabling, fixes #1037 (#1054 )	2020-10-26 10:37:49 +00:00
Thorin-Oakenpants	c45780d79b	0701 PHP localhost + IPv6, fixes #1053	2020-10-26 10:34:54 +00:00
Thorin-Oakenpants	e14732aad3	2031: better reference: closes #1022 (#1048 )	2020-10-23 23:29:31 +00:00
earthlng	26d4768447	add media.autoplay.blocking_policy	2020-10-21 13:44:21 +00:00
Thorin-Oakenpants	9f99885272	clean up acknowledgments	2020-10-20 12:57:00 +00:00
Thorin-Oakenpants	0adfddd1e2	misc (#1040 ) * misc - cleanup of old release notation in comments: e.g. if it's not applicable to ESR78+ - same with default version info - simplify and save bytes on section 4700 - update 4500 header - and unify the message about using extensions as counterproductive - letterboxing - provide info on stepped ranged (and drop crap about FF67) - don't judge users who dislike seeing margins (I don't like them either, but I force my window to exact dimensions and stay there) - screenshots uploading was disabled in FF67+ : [67 release notes](https://www.mozilla.org/en-US/firefox/67.0/releasenotes/) - the pref is still there (default false) but so far I'm 99% sure this pref now does anything - I will add it to the scatchpad script if this change sticks * simplify 4500 RFP, see #1041 * update removed script * tidy readme, see #1045 - also put readme before releases * RIP FX Site Compat * clean out RFP Alts info: the information is redundant: it's already in the readme	2020-10-20 11:58:20 +00:00
Thorin-Oakenpants	f591a8adf8	82-alpha, 82 deprecated, remove old deprecated	2020-10-13 14:12:53 +00:00