76-beta

extensions.blocklist.pingCountTotal is not used anymore in FF76+

.github/ISSUE_TEMPLATE/troubleshooting-help.md

@@ -8,11 +8,11 @@ assignees: ''
 ---
 
 Before you proceed...
-  - Keep reading this. Seriously.
-  - Note that we do not support forks (i.e. IceCat, Pale Moon, WaterFox, etc).
-  - Make sure you searched for the `[Setup` tags in the `user.js`.
+  - Issues will be closed as invalid if you do not [troubleshoot](https://github.com/ghacksuserjs/ghacks-user.js/wiki/1.4-Troubleshooting), including
+     - confirming the problem is caused by the `user.js`
+     - searching the `[Setup` tags in the `user.js`
   - Search the GitHub repository. The information you need is most likely here already.
-  - Check out our [troubleshooting](https://github.com/ghacksuserjs/ghacks-user.js/wiki/1.4-Troubleshooting) wiki page, including steps to see if the problem is caused by the `user.js` or an extension.
+  - Note: We do not support forks
 
 See also:
   - Extension breakage due to prefs [issue 391](https://github.com/ghacksuserjs/ghacks-user.js/issues/391)

README.md

@@ -8,7 +8,7 @@ Everyone, experts included, should at least read the [implementation](https://gi
 
 Note that we do *not* recommend connecting over Tor on Firefox. Use the [Tor Browser](https://www.torproject.org/projects/torbrowser.html.en) if your [threat model](https://www.torproject.org/about/torusers.html.en) calls for it, or for accessing hidden services. 
 
-Also be aware that this `user.js` is made specifically for Firefox. Using it as-is in other Gecko-based browsers can be counterproductive, especially in the Tor Browser.
+Also be aware that this `user.js` is made specifically for desktop Firefox. Using it as-is in other Gecko-based browsers can be counterproductive, especially in the Tor Browser.
 
 Sitemap: [Releases](https://github.com/ghacksuserjs/ghacks-user.js/releases), [changelogs](https://github.com/ghacksuserjs/ghacks-user.js/issues?utf8=%E2%9C%93&q=is%3Aissue+label%3Achangelog), [Wiki](https://github.com/ghacksuserjs/ghacks-user.js/wiki), [stickies](https://github.com/ghacksuserjs/ghacks-user.js/issues?q=is%3Aissue+is%3Aopen+label%3A%22sticky+topic%22). [diffs](https://github.com/ghacksuserjs/ghacks-user.js/issues?q=is%3Aissue+label%3Adiffs)
 
@@ -18,7 +18,7 @@ Literally thousands of sources, references and suggestions. That said...
 * Martin Brinkmann at [ghacks](https://www.ghacks.net/) <sup>1</sup>
 * The ghacks community and commentators
 * [12bytes](https://12bytes.org/articles/tech/firefox/firefoxgecko-configuration-guide-for-privacy-and-performance-buffs)
-   * The 12bytes article now uses this user.js and supplements it with an additional JS hosted at [GitLab](https://gitlab.com/labwrat/Firefox-user.js/tree/master)
+   * The 12bytes article now uses this user.js and supplements it with an additional JS hosted at [Codeberg](https://codeberg.org/12bytes.org/Firefox-user.js-supplement)
 
 <sup>1</sup> The ghacks user.js was an independent project by [Thorin-Oakenpants](https://github.com/Thorin-Oakenpants) started in early 2015 and was [first published](https://www.ghacks.net/2015/08/18/a-comprehensive-list-of-firefox-privacy-and-security-settings/) at ghacks in August 2015. With Martin Brinkmann's blessing, it will keep the ghacks name.
 

prefsCleaner.sh

@@ -2,7 +2,7 @@
 
 ## prefs.js cleaner for Linux/Mac
 ## author: @claustromaniac
-## version: 1.1
+## version: 1.2
 
 ## special thanks to @overdodactyl and @earthlng for a few snippets that I stol..*cough* borrowed from the updater.sh
 
@@ -27,7 +27,7 @@ fQuit() {
 fFF_check() {
 	# there are many ways to see if firefox is running or not, some more reliable than others
 	# this isn't elegant and might not be future-proof but should at least be compatible with any environment
-	while [ -e webappsstore.sqlite-shm ]; do
+	while [ -e lock ]; do
 		echo -e "\nThis Firefox profile seems to be in use. Close Firefox and try again.\n"
 		read -p "Press any key to continue."
 	done
@@ -58,7 +58,7 @@ echo -e "\n\n"
 echo "                   ╔══════════════════════════╗"
 echo "                   ║     prefs.js cleaner     ║"
 echo "                   ║    by claustromaniac     ║"
-echo "                   ║           v1.1           ║"
+echo "                   ║           v1.2           ║"
 echo "                   ╚══════════════════════════╝"
 echo -e "\nThis script should be run from your Firefox profile directory.\n"
 echo "It will remove any entries from prefs.js that also exist in user.js."

scratchpad-scripts/ghacks-clear-FF68inclusive-[RFP-alternatives].js

@@ -1,6 +1,6 @@
 /***
  This will reset the preferences that are under sections 4600 & 4700 in the ghacks user.js
- up to and including release 60-beta. These are the prefs that are no longer necessary,
+ up to and including Firefox/ESR 68. These are the prefs that are no longer necessary,
  or they conflict with, privacy.resistFingerprinting if you have that enabled.
 
  For instructions see:
@@ -22,6 +22,8 @@
     'dom.w3c_touch_events.enabled',
     'media.ondevicechange.enabled',
     'webgl.enable-debug-renderer-info',
+    'dom.w3c_pointer_events.enabled',
+    'ui.use_standins_for_native_colors',
     /* section 4700 */
     'general.useragent.override',
     'general.buildID.override',

scratchpad-scripts/ghacks-clear-FF68inclusive-[deprecated].js

@@ -1,6 +1,6 @@
 /***
  This will reset the preferences that have been deprecated by Mozilla
- and used in the ghacks user.js up to and including release 60-beta
+ and used in the ghacks user.js up to and including Firefox/ESR 68
 
  It is in reverse order, so feel free to remove sections that do not apply
 
@@ -12,8 +12,43 @@
   let ops = [
     /* deprecated */
 
-    /* ESR52.x users can remove sections 53-60 but it is not
-       crucial as your user.js will reinstate them */
+    /* 68 */
+    'browser.newtabpage.activity-stream.disableSnippets',
+    'browser.aboutHomeSnippets.updateUrl',
+    'lightweightThemes.update.enabled',
+    'security.csp.experimentalEnabled',
+    /* F67 */
+    'dom.event.highrestimestamp.enabled',
+    'browser.newtabpage.activity-stream.asrouter.userprefs.cfr',
+    /* 66 */
+    'browser.chrome.errorReporter.enabled',
+    'browser.chrome.errorReporter.submitUrl',
+    'network.allow-experiments',
+    /* 65 */
+    'browser.urlbar.autocomplete.enabled',
+    'browser.fixup.hide_user_pass',
+    /* 64 */
+    'browser.onboarding.enabled',
+    'devtools.webide.autoinstallADBHelper',
+    'devtools.webide.adbAddonURL',
+    'security.csp.enable_violation_events',
+    /* 63 */
+    'browser.search.countryCode',
+    'app.update.enabled',
+    'shield.savant.enabled',
+    'browser.chrome.favicons',
+    'media.autoplay.enabled',
+    'network.cookie.lifetime.days',
+    'browser.ctrlTab.previews',
+    /* 62 */
+    'plugin.state.java',
+    /* 61 */
+    'experiments.enabled',
+    'experiments.manifest.uri',
+    'experiments.supported',
+    'experiments.activeExperiment',
+    'network.jar.block-remote-files',
+    'network.jar.open-unsafe-types',
     /* 60 */
     'browser.newtabpage.directory.source',
     'browser.newtabpage.enhanced',
@@ -22,7 +57,6 @@
     'extensions.shield-recipe-client.api_url',
     'browser.newtabpage.activity-stream.enabled',
     'dom.workers.enabled',
-    'view_source.tab',
     /* 59 */
     'intl.locale.matchOS',
     'general.useragent.locale',
@@ -76,8 +110,6 @@
     'plugin.scan.WindowsMediaPlayer',
     'media.getusermedia.screensharing.allow_on_old_platforms',
     'dom.beforeAfterKeyboardEvent.enabled',
-    /* End of ESR52.x section */
-
     /* 52 */
     'network.http.sendSecureXSiteReferrer',
     'media.gmp-eme-adobe.enabled',

scratchpad-scripts/ghacks-clear-[removed].js

@@ -1,7 +1,7 @@
 /***
  This will reset the preferences that have been removed completely from the ghacks user.js.
 
- Last updated: 15-October-2019
+ Last updated: 12-April-2020
 
  For instructions see:
  https://github.com/ghacksuserjs/ghacks-user.js/wiki/3.1-Resetting-Inactive-Prefs-[Scripts]
@@ -204,14 +204,23 @@
     /* 70-beta */
     'browser.cache.disk_cache_ssl',
     'browser.sessionhistory.max_entries',
+    'dom.push.connection.enabled',
+    'dom.push.serverURL',
     'extensions.getAddons.discovery.api_url',
     'extensions.htmlaboutaddons.discover.enabled',
     'extensions.webservice.discoverURL',
     'intl.locale.requested',
     'intl.regional_prefs.use_os_locales',
-    'dom.push.connection.enabled',
-    'dom.push.serverURL',
+    'privacy.usercontext.about_newtab_segregation.enabled',
+    'security.insecure_connection_icon.pbmode.enabled',
+    'security.insecure_connection_text.pbmode.enabled',
     'webgl.dxgl.enabled',
+    /* 71-beta */
+    'media.block-autoplay-until-in-foreground',
+    'middlemouse.paste',
+    /* 75-beta */
+    'browser.search.geoip.url',
+    'browser.search.region',
     /* reset parrot: check your open about:config after running the script */
     '_user.js.parrot'
   ]

scratchpad-scripts/troubleshooter.js

@@ -1,65 +1,11 @@
 
-/*** ghacks-user.js troubleshooter.js v1.5.2 ***/
+/*** ghacks-user.js troubleshooter.js v1.6.1 ***/
 
 (function() {
 
-  if("undefined" === typeof(Services)) {
-    alert("about:config needs to be the active tab!");
-    return;
-  }
+  if ("undefined" === typeof(Services)) return alert('about:config needs to be the active tab!');
 
-  function getMyList(arr) {
-    let aRet = [];
-    let dummy = 0;
-    for (let i = 0, len = arr.length; i < len; i++) {
-      if (Services.prefs.prefHasUserValue(arr[i])) {
-        dummy = Services.prefs.getPrefType(arr[i]);
-        switch (dummy) {
-          case 32: // string (see https://dxr.mozilla.org/mozilla-central/source/modules/libpref/nsIPrefBranch.idl#31)
-            dummy = Services.prefs.getCharPref(arr[i]);
-            aRet.push({'name':arr[i],'value': dummy,'type':32});
-            break;
-          case 64: // int
-            dummy = Services.prefs.getIntPref(arr[i]);
-            aRet.push({'name':arr[i],'value': dummy,'type':64});
-            break;
-          case 128: // boolean
-            dummy = Services.prefs.getBoolPref(arr[i]);
-            aRet.push({'name':arr[i],'value': dummy,'type':128});
-            break;
-          default:
-            console.log("error detecting pref-type for '"+arr[i]+"' !");
-        }
-      }
-    }
-    return aRet;
-  }
-
-  function reapply(arr) {
-    for (let i = 0, len = arr.length; i < len; i++) {
-      switch (arr[i].type) {
-        case 32: // string
-          Services.prefs.setCharPref(arr[i].name, arr[i].value);
-          break;
-        case 64: // int
-          Services.prefs.setIntPref(arr[i].name, arr[i].value);
-          break;
-        case 128: // boolean
-          Services.prefs.setBoolPref(arr[i].name, arr[i].value);
-          break;
-        default:
-          console.log("error re-appyling value for '"+arr[i].name+"' !"); // should never happen
-      }
-    }
-  }
-
-  function myreset(arr) {
-    for (let i = 0, len = arr.length; i < len; i++) {
-      Services.prefs.clearUserPref(arr[i].name);
-    }
-  }
-
-  let ops = [
+  const aPREFS = [
 
     /* known culprits */
     'network.cookie.cookieBehavior',
@@ -160,56 +106,108 @@
     'last.one.without.comma'
   ]
 
+  // any runtime-set pref that everyone will have and that can be safely reset
+  const oFILLER = { type: 64, name: 'app.update.lastUpdateTime.browser-cleanup-thumbnails', value: 1580000000 };
 
-  // reset prefs that set the same value as FFs default value
-  let aTEMP = getMyList(ops);
-  myreset(aTEMP);
-  reapply(aTEMP);
+  function getMyList(arr) {
+    const aRet = [];
+    for (const sPname of arr) {
+      if (Services.prefs.prefHasUserValue(sPname)) {
+        const ptype = Services.prefs.getPrefType(sPname);
+        switch (ptype) {
+          case 32: // string (see https://dxr.mozilla.org/mozilla-central/source/modules/libpref/nsIPrefBranch.idl#31)
+            aRet.push({'type':ptype,'name':sPname,'value':Services.prefs.getCharPref(sPname)});
+            break;
+          case 64: // int
+            aRet.push({'type':ptype,'name':sPname,'value':Services.prefs.getIntPref(sPname)});
+            break;
+          case 128: // boolean
+            aRet.push({'type':ptype,'name':sPname,'value':Services.prefs.getBoolPref(sPname)});
+            break;
+          default:
+            console.log("error detecting pref-type for '"+sPname+"' !");
+        }
+      }
+    }
+    return aRet;
+  }
 
-  const aBACKUP = getMyList(ops);
-  //console.log(aBACKUP.length, "user-set prefs from our list detected and their values stored.");
+  function reapply(arr) {
+    for (const oPref of arr) {
+      switch (oPref.type) {
+        case 32: // string
+          Services.prefs.setCharPref(oPref.name, oPref.value);
+          break;
+        case 64: // int
+          Services.prefs.setIntPref(oPref.name, oPref.value);
+          break;
+        case 128: // boolean
+          Services.prefs.setBoolPref(oPref.name, oPref.value);
+          break;
+        default:
+          console.log("error re-appyling value for '"+oPref.name+"' !"); // should never happen
+      }
+    }
+  }
 
-  let myArr = aBACKUP;
-  let found = false;
-  let aDbg = [];
-  focus();
-  myreset(aBACKUP); // reset all detected prefs
-  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.")) {
-    aDbg = myArr;
-    reapply(aBACKUP);
-    myreset(myArr.slice(0, parseInt(myArr.length/2)));
-    while (myArr.length >= 2) {
+  function myreset(arr) {
+    for (const oPref of arr) Services.prefs.clearUserPref(oPref.name);
+  }
+
+  function resetAllMatchingDefault(arr) {
+    const aTmp = getMyList(arr);
+    myreset(aTmp);
+    reapply(aTmp);
+  }
+
+  function _main(aALL) {
+    const _h = (arr) => Math.ceil(arr.length/2);
+
+    let aTmp = aALL, aDbg = aALL;
+    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.")) {
-        myArr = myArr.slice(parseInt(myArr.length/2));
-        if (myArr.length == 1) {
-          alert("The problem is caused by more than 1 pref !\n\nNarrowed it down to "+ aDbg.length.toString() +" prefs, check the console ...");
-          break;
-        }
+        aTmp = aTmp.slice(_h(aTmp));
       } else {
-        myArr = myArr.slice(0, parseInt(myArr.length/2));
-        aDbg = myArr;
-        if (myArr.length == 1) { found = true; break; }
+        aTmp = aTmp.slice(0, _h(aTmp));
+        aDbg = aTmp; // update narrowed down list
+        if (aDbg.length == 1) break;
       }
-      reapply(aBACKUP);
-      myreset(myArr.slice(0, parseInt(myArr.length/2))); // reset half of the remaining prefs
+      reapply(aALL);
+      myreset(aTmp.slice(0, _h(aTmp))); // reset half of the remaining prefs
     }
-    reapply(aBACKUP);
+    reapply(aALL);
+
+    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?";
+      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());
     }
-  else {
-    reapply(aBACKUP);
+
+    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:");
+    for (const oPref of aDbg) console.log(oPref.name);
+  }
+
+
+  resetAllMatchingDefault(aPREFS); // reset user-set prefs matching FFs default value
+
+  const aBAK = getMyList(aPREFS);
+  //console.log(aBAK.length, "user-set prefs from our list detected and their values stored.");
+
+  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.")) {
+    reapply(aBAK);
     return;
   }
 
-  if (found) {
-    alert("narrowed it down to:\n\n"+myArr[0].name+"\n");
-    myreset(myArr); // reset the culprit
-  }
-  else {
-    console.log("the problem is caused by a combination of the following prefs:");
-    for (let i = 0, len = aDbg.length; i < len; i++) {
-      console.log(aDbg[i].name);
-    }
-  }
+  _main(aBAK);
 
 })();

user.js

@@ -1,14 +1,13 @@
 /******
 * name: ghacks user.js
-* date: 20 September 2019
-* version 69: Pants One More Time
-*   "When I'm not with pants I lose my mind. Give me a sign. Hit me, pants, one more time."
+* date: 7 May 2020
+* version 76-beta
 * 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.
+            *Always* use the master branch user.js for a current up-to-date version
        url: https://github.com/ghacksuserjs/ghacks-user.js/releases
 
 * README:
@@ -83,6 +82,12 @@
  * [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
+ * FF71-72: chrome://global/content/config.xul
+ * FF73+: chrome://global/content/config.xhtml ***/
+user_pref("general.warnOnAboutConfig", false); // XUL/XHTML version
+user_pref("browser.aboutConfig.showWarning", false); // HTML version [FF71+]
+
 /*** [SECTION 0100]: STARTUP ***/
 user_pref("_user.js.parrot", "0100 syntax error: the parrot's dead!");
 /* 0101: disable default browser check
@@ -108,7 +113,6 @@ user_pref("browser.newtab.preload", false);
 /* 0105a: disable Activity Stream telemetry ***/
 user_pref("browser.newtabpage.activity-stream.feeds.telemetry", false);
 user_pref("browser.newtabpage.activity-stream.telemetry", false);
-user_pref("browser.newtabpage.activity-stream.telemetry.ping.endpoint", "");
 /* 0105b: disable Activity Stream Snippets
  * 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/ ***/
@@ -146,20 +150,14 @@ user_pref("_user.js.parrot", "0200 syntax error: the parrot's definitely decease
  * [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);
-/* 0203: use Mozilla geolocation service instead of Google when geolocation is enabled
+/* 0203: use Mozilla geolocation service instead of Google when geolocation is enabled [FF74+]
  * 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]
+user_pref("geo.provider.network.url", "https://location.services.mozilla.com/v1/geolocate?key=%MOZILLA_API_KEY%");
+   // user_pref("geo.provider.network.logging.enabled", true); // [HIDDEN PREF]
 /* 0204: disable using the OS's geolocation service ***/
 user_pref("geo.provider.ms-windows-location", false); // [WINDOWS]
 user_pref("geo.provider.use_corelocation", false); // [MAC]
 user_pref("geo.provider.use_gpsd", false); // [LINUX]
-/* 0205: 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.region", "US"); // [HIDDEN PREF]
-user_pref("browser.search.geoip.url", "");
 /* 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);
@@ -170,7 +168,9 @@ user_pref("browser.search.geoSpecificDefaults.url", "");
  * [TEST] https://addons.mozilla.org/about ***/
 user_pref("intl.accept_languages", "en-US, en");
 /* 0211: enforce US English locale regardless of the system locale
- * [1] https://bugzilla.mozilla.org/867501 ***/
+ * [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 ***/
 user_pref("javascript.use_us_english_locale", true); // [HIDDEN PREF]
 /* 0212: enforce fallback text encoding to match en-US
  * When the content or server doesn't declare a charset the browser will
@@ -194,16 +194,17 @@ user_pref("_user.js.parrot", "0300 syntax error: the parrot's not pinin' for the
    // user_pref("extensions.update.enabled", false);
 /* 0302a: disable auto-INSTALLING Firefox updates [NON-WINDOWS FF65+]
  * [NOTE] In FF65+ on Windows this SETTING (below) is now stored in a file and the pref was removed
- * [SETTING] General>Firefox Updates>Check for updates but let you choose... ***/
+ * [SETTING] General>Firefox Updates>Check for updates but let you choose to install them ***/
 user_pref("app.update.auto", false);
 /* 0302b: disable auto-INSTALLING extension and theme updates (after the check in 0301b)
  * [SETTING] about:addons>Extensions>[cog-wheel-icon]>Update Add-ons Automatically (toggle) ***/
    // user_pref("extensions.update.autoUpdateDefault", false);
 /* 0306: disable extension metadata
- * used when installing/updating an extension, and in daily background update checks: if false, it
- * hides the expanded text description (if it exists) when you "show more details about an addon" ***/
+ * used when installing/updating an extension, and in daily background update checks:
+ * when false, extension detail tabs will have no description ***/
    // user_pref("extensions.getAddons.cache.enabled", false);
-/* 0308: disable search update
+/* 0308: disable search engine updates (e.g. OpenSearch)
+ * [NOTE] This does not affect Mozilla's built-in or Web Extension search engines
  * [SETTING] General>Firefox Updates>Automatically update search engines ***/
 user_pref("browser.search.update", false);
 /* 0309: disable sending Flash crash reports ***/
@@ -232,7 +233,6 @@ 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+]
 /* 0331: disable Telemetry Coverage
  * [1] https://blog.mozilla.org/data/2018/08/20/effectively-measuring-search-in-firefox/ ***/
 user_pref("toolkit.telemetry.coverage.opt-out", true); // [HIDDEN PREF]
@@ -246,12 +246,11 @@ user_pref("datareporting.healthreport.uploadEnabled", false);
  * [1] https://bugzilla.mozilla.org/1195552 ***/
 user_pref("datareporting.policy.dataSubmissionEnabled", false);
 /* 0342: disable Studies (see 0503)
- * [NOTE] This pref has no effect when Health Reports (0340) are disabled
- * [SETTING] Privacy & Security>Firefox Data Collection & Use>...>Allow Firefox to install and run studies ***/
+ * [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to install and run studies ***/
 user_pref("app.shield.optoutstudies.enabled", false);
 /* 0343: disable personalized Extension Recommendations in about:addons and AMO [FF65+]
  * [NOTE] This pref has no effect when Health Reports (0340) are disabled
- * [SETTING] Privacy & Security>Firefox Data Collection & Use>...>Allow Firefox to make personalized extension rec.
+ * [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to make personalized extension recommendations
  * [1] https://support.mozilla.org/kb/personalized-extension-recommendations ***/
 user_pref("browser.discovery.enabled", false);
 /* 0350: disable Crash Reports ***/
@@ -273,12 +272,10 @@ user_pref("network.connectivity-service.enabled", false);
 /*** [SECTION 0400]: BLOCKLISTS / SAFE BROWSING (SB) ***/
 user_pref("_user.js.parrot", "0400 syntax error: the parrot's passed on!");
 /** BLOCKLISTS ***/
-/* 0401: enforce Firefox blocklist, but sanitize blocklist url
+/* 0401: enforce Firefox blocklist
  * [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 ***/
+ * [1] https://blog.mozilla.org/security/2015/03/03/revoking-intermediate-certificates-introducing-onecrl/ ***/
 user_pref("extensions.blocklist.enabled", true); // [DEFAULT: true]
-user_pref("extensions.blocklist.url", "https://blocklists.settings.services.mozilla.com/v1/blocklist/3/%APP_ID%/%APP_VERSION%/");
 
 /** SAFE BROWSING (SB)
     Safe Browsing has taken many steps to preserve privacy. *IF* required, a full url is never
@@ -355,7 +352,7 @@ user_pref("browser.ping-centre.telemetry", false);
 /* 0517: disable Form Autofill
  * [NOTE] Stored data is NOT secure (uses a JSON file)
  * [NOTE] Heuristics controls Form Autofill on forms without @autocomplete attributes
- * [SETTING] Privacy & Security>Forms & Passwords>Autofill addresses
+ * [SETTING] Privacy & Security>Forms and Autofill>Autofill addresses (FF74+)
  * [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); // [FF55+]
@@ -375,7 +372,7 @@ user_pref("network.prefetch-next", false);
  * [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]
+user_pref("network.dns.disablePrefetchFromHTTPS", true); // [HIDDEN PREF ESR] [DEFAULT: true FF70+]
 /* 0603: disable predictor / prefetching ***/
 user_pref("network.predictor.enabled", false);
 user_pref("network.predictor.enable-prefetch", false); // [FF48+]
@@ -393,7 +390,7 @@ user_pref("_user.js.parrot", "0700 syntax error: the parrot's given up the ghost
 /* 0701: disable IPv6
  * 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 handle it.
- * Firefox telemetry (April 2019) shows only 5% of all connections are IPv6.
+ * Firefox telemetry (April 2019) shows only 5% 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.
@@ -405,7 +402,7 @@ user_pref("network.dns.disableIPv6", true);
  * HTTP2 raises concerns with "multiplexing" and "server push", does nothing to
  * enhance privacy, and opens up a number of server-side fingerprinting opportunities.
  * [WARNING] Disabling this made sense in the past, and doesn't break anything, but HTTP2 is
- * at 35% (April 2019) and growing [5]. Don't be that one person using HTTP1.1 on HTTP2 sites
+ * at 40% (December 2019) and growing [5]. Don't be that one person using HTTP1.1 on HTTP2 sites
  * [1] https://http2.github.io/faq/
  * [2] https://blog.scottlogic.com/2014/11/07/http-2-a-quick-look.html
  * [3] https://http2.github.io/http2-spec/#rfc.section.10.8
@@ -428,16 +425,6 @@ 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);
-/* 0707: disable (or setup) DNS-over-HTTPS (DoH) [FF60+]
- * TRR = Trusted Recursive Resolver
- * 0=off by default, 1=race (removed in FF69), 2=TRR first, 3=TRR only,
- * 4=race for stats but always use native result (removed in FF69), 5=explicitly off
- * [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);
@@ -522,11 +509,12 @@ user_pref("browser.urlbar.speculativeConnect.enabled", 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);
-/* 0860: disable search and form history [SETUP-WEB]
- * [WARNING] Autocomplete form data is still (in April 2019) easily read by third parties, see [1]
- * [NOTE] We also clear formdata on exiting Firefox (see 2803)
+/* 0860: disable search and form history
+ * [SETUP-WEB] Be aware thet autocomplete form data can be read by third parties, see [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 ***/
+ * [1] https://blog.mindedsecurity.com/2011/10/autocompleteagain.html
+ * [2] https://bugzilla.mozilla.org/381681 ***/
 user_pref("browser.formfill.enable", false);
 /* 0862: disable browsing and download history
  * [NOTE] We also clear history and downloads on exiting Firefox (see 2803)
@@ -544,11 +532,11 @@ user_pref("browser.taskbar.previews.enable", false);
 user_pref("_user.js.parrot", "0900 syntax error: the parrot's expired!");
 /* 0901: disable saving passwords
  * [NOTE] This does not clear any passwords already saved
- * [SETTING] Privacy & Security>Forms & Passwords>Ask to save logins and passwords for websites ***/
+ * [SETTING] Privacy & Security>Logins and Passwords>Ask to save logins and passwords for websites ***/
    // user_pref("signon.rememberSignons", false);
-/* 0902: use a master password (recommended if you save passwords)
+/* 0902: use a master password
  * There are no preferences for this. It is all handled internally.
- * [SETTING] Privacy & Security>Forms & Passwords>Use a master password
+ * [SETTING] Privacy & Security>Logins and 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 (see 0904) ***/
@@ -558,7 +546,8 @@ user_pref("security.ask_for_password", 2);
 user_pref("security.password_lifetime", 5);
 /* 0905: disable auto-filling username & password form fields
  * can leak in cross-site forms *and* be spoofed
- * [NOTE] Username & password is still available when you enter the field ***/
+ * [NOTE] Username & password is still available when you enter the field
+ * [SETTING] Privacy & Security>Logins and Passwords>Autofill logins and passwords ***/
 user_pref("signon.autofillForms", false);
 /* 0909: disable formless login capture for Password Manager [FF51+] ***/
 user_pref("signon.formlessCapture.enabled", false);
@@ -596,11 +585,15 @@ user_pref("browser.cache.disk.enable", false);
 /* 1003: disable memory cache
 /* capacity: -1=determine dynamically (default), 0=none, n=memory capacity in kilobytes ***/
    // user_pref("browser.cache.memory.enable", false);
-   // user_pref("browser.cache.memory.capacity", 0); // [HIDDEN PREF]
+   // user_pref("browser.cache.memory.capacity", 0); // [HIDDEN PREF ESR]
 /* 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]
+/* 1007: disable media cache from writing to disk in Private Browsing
+ * [NOTE] MSE (Media Source Extensions) are already stored in-memory in PB */
+user_pref("browser.privatebrowsing.forceMediaMemoryCache", true); // [FF75+]
+user_pref("media.memory_cache_max_size", 16384);
 
 /** SESSIONS & SESSION RESTORE ***/
 /* 1020: exclude "Undo Closed Tabs" in Session Restore ***/
@@ -630,38 +623,42 @@ user_pref("toolkit.winRegisterApplicationRestart", false);
  * 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 favicons.sqlite ***/
+/* 1031: disable favicons in history and bookmarks
+ * Stored as data blobs in favicons.sqlite, these don't reveal anything that your
+ * actual history (and bookmarks) already do. Your history is more detailed, so
+ * control that instead; e.g. disable history, clear history on close, use PB mode
+ * [NOTE] favicons.sqlite is sanitized on Firefox close, not in-session ***/
    // user_pref("browser.chrome.site_icons", false);
 /* 1032: disable favicons in web notifications ***/
-user_pref("alerts.showFavicons", false); // [DEFAULT: false]
+   // user_pref("alerts.showFavicons", false); // [DEFAULT: false]
 
 /*** [SECTION 1200]: HTTPS (SSL/TLS / OCSP / CERTS / 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 defaults for ciphers (1260's). There is nothing *weak* about these, but
-             due to breakage, browsers can't deprecate them until the web stops using them
-   Option 2: Disable the ciphers in 1261, 1262 and 1263. These shouldn't break anything.
-             Optionally, disable the ciphers in 1264.
-
+   Your cipher and other settings can be used in server side fingerprinting
+   [TEST] https://www.ssllabs.com/ssltest/viewMyClient.html
    [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 "insecure" renegotiation (vulnerable to a MiTM attack)
- * [SETUP-WEB] <2% of secure sites do NOT support the newer "secure" renegotiation, see [2]
+/* 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
+ * no unsafe renegotiations on the channel between the browser and the server.
  * [1] https://wiki.mozilla.org/Security:Renegotiation
- * [2] https://www.ssllabs.com/ssl-pulse/ ***/
+ * [2] https://tools.ietf.org/html/rfc5746
+ * [3] https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3555 ***/
 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
  * [WARNING] Leave these at default, otherwise you alter your TLS fingerprint.
- * Firefox telemetry (April 2019) shows only 0.5% of TLS web traffic uses 1.0 or 1.1 ***/
+ * Firefox telemetry (April 2020) shows only 0.25% of TLS web traffic uses 1.0 or 1.1
+ * [1] https://www.ssllabs.com/ssl-pulse/ ***/
    // user_pref("security.tls.version.min", 3);
    // user_pref("security.tls.version.max", 4);
-/* 1203: disable SSL session tracking [FF36+]
+/* 1203: enforce TLS 1.0 and 1.1 downgrades as session only */
+user_pref("security.tls.version.enable-deprecated", false);
+/* 1204: disable SSL session tracking [FF36+]
  * SSL Session IDs are unique, last up to 24hrs in Firefox, and can be used for tracking
  * [SETUP-PERF] Relax this if you have FPI enabled (see 4000) *AND* you understand the
  * consequences. FPI isolates these, but it was designed with the Tor protocol in mind,
@@ -670,12 +667,12 @@ user_pref("security.ssl.require_safe_negotiation", true);
  * [2] https://bugzilla.mozilla.org/967977
  * [3] https://arxiv.org/abs/1810.07304 ***/
 user_pref("security.ssl.disable_session_identifiers", true); // [HIDDEN PREF]
-/* 1204: disable SSL Error Reporting
+/* 1205: 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+]
+/* 1206: 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);
@@ -725,7 +722,7 @@ user_pref("security.family_safety.mode", 0);
    // user_pref("security.nocertdb", true); // [HIDDEN PREF]
 /* 1223: 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
+ * [SETUP-WEB] If you rely on an AV (antivirus) to protect your web browsing
  * by inspecting ALL your web traffic, then leave at current default=1
  * [1] https://trac.torproject.org/projects/tor/ticket/16206 ***/
 user_pref("security.cert_pinning.enforcement_level", 2);
@@ -739,8 +736,12 @@ user_pref("security.mixed_content.block_display_content", true);
 /* 1243: block unencrypted requests from Flash on encrypted pages to mitigate MitM attacks [FF59+]
  * [1] https://bugzilla.mozilla.org/1190623 ***/
 user_pref("security.mixed_content.block_object_subrequest", true);
+/* 1244: enable https-only-mode [FF76+]
+ * [NOTE] This is experimental
+ * [1] https://bugzilla.mozilla.org/1613063 */
+   // user_pref("dom.security.https_only_mode", true);
 
-/** CIPHERS [see the section 1200 intro] ***/
+/** CIPHERS [WARNING: do not meddle with your cipher suite: see the section 1200 intro] ***/
 /* 1261: disable 3DES (effective key size < 128)
  * [1] https://en.wikipedia.org/wiki/3des#Security
  * [2] https://en.wikipedia.org/wiki/Meet-in-the-middle_attack
@@ -758,8 +759,10 @@ user_pref("security.mixed_content.block_object_subrequest", true);
    // user_pref("security.ssl3.rsa_aes_256_sha", false);
 
 /** UI (User Interface) ***/
-/* 1270: display warning (red padlock) for "broken security" (see 1201)
- * [1] https://wiki.mozilla.org/Security:Renegotiation ***/
+/* 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]
+ * [1] https://wiki.mozilla.org/Security:Renegotiation
+ * [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)
@@ -771,16 +774,14 @@ 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+]
+user_pref("security.insecure_connection_icon.enabled", true); // [FF59+] [DEFAULT: true FF70+]
 user_pref("security.insecure_connection_text.enabled", true); // [FF60+]
-   // user_pref("security.insecure_connection_icon.pbmode.enabled", true); // [FF59+] private windows only
-   // user_pref("security.insecure_connection_text.pbmode.enabled", true); // [FF60+] private windows only
 
 /*** [SECTION 1400]: FONTS ***/
 user_pref("_user.js.parrot", "1400 syntax error: the parrot's bereft of life!");
 /* 1401: disable websites choosing fonts (0=block, 1=allow)
  * This can limit most (but not all) JS font enumeration which is a high entropy fingerprinting vector
- * [SETUP-WEB] Disabling fonts can uglify the web a fair bit.
+ * [SETUP-WEB] Can break some PDFs (missing text). Limiting to default fonts can "uglify" the web
  * [SETTING] General>Language and Appearance>Fonts & Colors>Advanced>Allow pages to choose... ***/
 user_pref("browser.display.use_document_fonts", 0);
 /* 1403: disable icon fonts (glyphs) and local fallback rendering
@@ -791,9 +792,10 @@ user_pref("browser.display.use_document_fonts", 0);
 /* 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);
-/* 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 ***/
+/* 1408: disable graphite
+ * Graphite has had many critical security issues in the past, see [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.
@@ -827,7 +829,7 @@ user_pref("_user.js.parrot", "1600 syntax error: the parrot rests in peace!");
    // user_pref("network.http.referer.trimmingPolicy", 0); // [DEFAULT: 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 ***/
+ * [SETUP-WEB] Known to cause issues with older modems/routers and some sites e.g vimeo, icloud ***/
 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+port+path, 2=scheme+host+port ***/
@@ -850,8 +852,8 @@ user_pref("network.http.referer.XOriginTrimmingPolicy", 0); // [DEFAULT: 0]
  * [1] https://bugzilla.mozilla.org/1305144 ***/
 user_pref("network.http.referer.hideOnionSource", true);
 /* 1610: ALL: enable the DNT (Do Not Track) HTTP header
- * [NOTE] DNT is enforced with Tracking Protection regardless of this pref
- * [SETTING] Privacy & Security>Content Blocking>Send websites a "Do Not Track"... ***/
+ * [NOTE] DNT is enforced with Enhanced Tracking Protection regardless of this pref
+ * [SETTING] Privacy & Security>Enhanced Tracking Protection>Send websites a "Do Not Track" signal... ***/
 user_pref("privacy.donottrackheader.enabled", true);
 
 /*** [SECTION 1700]: CONTAINERS
@@ -869,12 +871,10 @@ user_pref("privacy.userContext.ui.enabled", true);
 /* 1702: enable Container Tabs [FF50+]
  * [SETTING] General>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); // [DEFAULT: true in FF61+]
-/* 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 ***/
-user_pref("privacy.userContext.longPressBehavior", 2);
+/* 1703: set behaviour on "+ Tab" button to display container menu on left click [FF74+]
+ * [NOTE] The menu is always shown on long press and right click
+ * [SETTING] General>Tabs>Enable Container Tabs>Settings>Select a container for each new tab ***/
+   // user_pref("privacy.userContext.newTabContainerOnLeftClick.enabled", true);
 
 /*** [SECTION 1800]: PLUGINS ***/
 user_pref("_user.js.parrot", "1800 syntax error: the parrot's pushing up daisies!");
@@ -905,11 +905,14 @@ 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])
  * [TEST] https://browserleaks.com/webrtc
- * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1189041,1297416
- * [2] https://wiki.mozilla.org/Media/WebRTC/Privacy ***/
+ * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1189041,1297416,1452713
+ * [2] https://wiki.mozilla.org/Media/WebRTC/Privacy
+ * [3] https://tools.ietf.org/html/draft-ietf-rtcweb-ip-handling-12#section-5.2 ***/
 user_pref("media.peerconnection.ice.default_address_only", true);
 user_pref("media.peerconnection.ice.no_host", true); // [FF51+]
+user_pref("media.peerconnection.ice.proxy_only_if_behind_proxy", true); // [FF70+]
 /* 2010: disable WebGL (Web Graphics Library)
  * [SETUP-WEB] When disabled, may break some websites. When enabled, provides high entropy,
  * especially with readPixels(). Some of the other entropy is lessened with RFP (see 4501)
@@ -919,7 +922,6 @@ user_pref("webgl.disabled", true);
 user_pref("webgl.enable-webgl2", false);
 /* 2012: limit WebGL ***/
 user_pref("webgl.min_capability_mode", true);
-user_pref("webgl.disable-extensions", true);
 user_pref("webgl.disable-fail-if-major-performance-caveat", true);
 /* 2022: disable screensharing ***/
 user_pref("media.getusermedia.screensharing.enabled", false);
@@ -938,9 +940,6 @@ 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 [FF66+] ***/
 user_pref("media.autoplay.enabled.user-gestures-needed", false);
-/* 2032: disable autoplay of HTML5 media 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); // [DEFAULT: true]
 
 /*** [SECTION 2200]: WINDOW MEDDLING & LEAKS / POPUPS ***/
 user_pref("_user.js.parrot", "2200 syntax error: the parrot's 'istory!");
@@ -1030,16 +1029,14 @@ 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
- * [SETUP-WEB] 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 middlemouse paste leaking clipboard content on Linux after autoscroll
- * Defense in depth if clipboard events are enabled (see 2402)
- * [1] https://bugzilla.mozilla.org/1528289 */
-user_pref("middlemouse.paste", false); // [DEFAULT: false on Windows]
+/* 2402: disable website access to clipboard events/content [SETUP-HARDEN]
+ * [NOTE] This will break some sites' functionality e.g. Outlook, Twitter, Facebook, Wordpress
+ * This applies to onCut/onCopy/onPaste events - i.e. it requires interaction with the website
+ * [WARNING] If both 'middlemouse.paste' and 'general.autoScroll' are true (at least one
+ * is default false) then enabling this pref can leak clipboard content, see [2]
+ * [1] https://www.ghacks.net/2014/01/08/block-websites-reading-modifying-clipboard-contents-firefox/
+ * [2] https://bugzilla.mozilla.org/1528289 */
+   // user_pref("dom.event.clipboardevents.enabled", false);
 /* 2404: 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 ***/
@@ -1059,12 +1056,16 @@ user_pref("dom.vibrator.enabled", false);
  * [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] If false, causes the odd site issue and there is also a performance loss
+/* 2421: disable Ion and baseline JIT to harden against JS exploits [SETUP-HARDEN]
+ * [NOTE] In FF75+, when **both** Ion and JIT are disabled, **and** the new
+ * hidden pref is enabled, then Ion can still be used by extensions (1599226)
+ * [WARNING] Disabling Ion/JIT can cause some site issues and performance loss
  * [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);
+   // 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 ***/
 user_pref("javascript.options.wasm", false);
 /* 2426: disable Intersection Observer API [FF55+]
@@ -1085,10 +1086,6 @@ user_pref("_user.js.parrot", "2500 syntax error: the parrot's shuffled off 'is m
  * [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
- * 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
@@ -1109,6 +1106,15 @@ user_pref("dom.webaudio.enabled", false);
  * [1] https://github.com/WICG/media-capabilities
  * [2] https://wicg.github.io/media-capabilities/#security-privacy-considerations ***/
    // user_pref("media.media-capabilities.enabled", false);
+/* 2520: disable virtual reality devices
+ * Optional protection depending on your connected devices
+ * [1] https://developer.mozilla.org/docs/Web/API/WebVR_API ***/
+   // user_pref("dom.vr.enabled", false);
+/* 2521: set a default permission for Virtual Reality (see 2520) [FF73+]
+ * 0=always ask (default), 1=allow, 2=block
+ * [SETTING] to add site exceptions: Page Info>Permissions>Access Virtual Reality Devices
+ * [SETTING] to manage site exceptions: Options>Privacy & Security>Permissions>Virtual Reality>Settings ***/
+   // user_pref("permissions.default.xr", 0);
 
 /*** [SECTION 2600]: MISCELLANEOUS ***/
 user_pref("_user.js.parrot", "2600 syntax error: the parrot's run down the curtain!");
@@ -1128,7 +1134,7 @@ user_pref("browser.pagethumbnails.capturing_disabled", true); // [HIDDEN PREF]
 /* 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 ***/
-user_pref("browser.tabs.remote.allowLinkedWebInFileUriProcess", false);
+user_pref("browser.tabs.remote.allowLinkedWebInFileUriProcess", false); // [DEFAULT: false FF76+]
 /* 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", "");
@@ -1136,16 +1142,15 @@ user_pref("browser.uitour.url", "");
  * [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 ADB extension download
+/* 2608: disable remote debugging
  * [1] https://trac.torproject.org/projects/tor/ticket/16222 ***/
 user_pref("devtools.debugger.remote-enabled", false);
-user_pref("devtools.webide.enabled", false);
-user_pref("devtools.webide.autoinstallADBExtension", false); // [FF64+]
 /* 2609: disable MathML (Mathematical Markup Language) [FF51+] [SETUP-HARDEN]
  * [TEST] https://ghacksuserjs.github.io/TorZillaPrint/TorZillaPrint.html#misc
  * [1] https://bugzilla.mozilla.org/1173199 ***/
    // user_pref("mathml.disabled", true);
 /* 2610: disable in-content SVG (Scalable Vector Graphics) [FF53+]
+ * [NOTE] In FF70+ and ESR68.1.0+ this no longer affects extensions (1564208)
  * [WARNING] Expect breakage incl. youtube player controls. Best left for a "hardened" profile.
  * [1] https://bugzilla.mozilla.org/1216893 ***/
    // user_pref("svg.disabled", true);
@@ -1166,15 +1171,15 @@ user_pref("permissions.manager.defaultsUrl", "");
 /* 2617: remove webchannel whitelist ***/
 user_pref("webchannel.allowObject.urlWhitelist", "");
 /* 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
+ * Firefox has *some* protections, but it is better to be safe than sorry
+ * [SETUP-WEB] Might be undesirable for non-latin alphabet users since legitimate IDN's are also punycoded
  * [TEST] https://www.xn--80ak6aa92e.com/ (www.apple.com)
  * [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-CHROME]
+/* 2620: enforce Firefox's built-in PDF reader [SETUP-CHROME]
  * This setting controls if the option "Display in Firefox" is available in the setting below
  *   and by effect controls whether PDFs are handled in-browser or externally ("Ask" or "Open With")
  * PROS: pdfjs is lightweight, open source, and as secure/vetted as any pdf reader out there (more than most)
@@ -1188,6 +1193,15 @@ user_pref("pdfjs.disabled", false); // [DEFAULT: false]
 /* 2621: 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);
+/* 2622: enforce no system colors; they can be fingerprinted
+ * [SETTING] General>Language and Appearance>Fonts and Colors>Colors>Use system colors ***/
+user_pref("browser.display.use_system_colors", false); // [DEFAULT: false]
+/* 2623: disable permissions delegation [FF73+]
+ * Currently applies to cross-origin geolocation, camera, mic and screen-sharing
+ * permissions, and fullscreen requests. Disabling delegation means any prompts
+ * for these will show/use their correct 3rd party origin
+ * [1] https://groups.google.com/forum/#!topic/mozilla.dev.platform/BdFOMAuCGW8/discussion */
+user_pref("permissions.delegation.enabled", false);
 
 /** DOWNLOADS ***/
 /* 2650: discourage downloading to desktop
@@ -1217,12 +1231,13 @@ user_pref("browser.download.hide_plugins_without_extensions", false);
  * [1] archived: https://archive.is/DYjAM ***/
 user_pref("extensions.enabledScopes", 5); // [HIDDEN PREF]
 user_pref("extensions.autoDisableScopes", 15); // [DEFAULT: 15]
-/* 2662: disable webextension restrictions on certain mozilla domains (also see 4503) [FF60+]
+/* 2662: disable webextension restrictions on certain mozilla domains (you also need 4503) [FF60+]
  * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1384330,1406795,1415644,1453988 ***/
    // user_pref("extensions.webextensions.restrictedDomains", "");
 
 /** SECURITY ***/
-/* 2680: enable CSP (Content Security Policy)
+/* 2680: enforce CSP (Content Security Policy)
+ * [WARNING] CSP is a very important and widespread security feature. Don't disable it!
  * [1] https://developer.mozilla.org/docs/Web/HTTP/CSP ***/
 user_pref("security.csp.enable", true); // [DEFAULT: true]
 /* 2684: enforce a security delay on some confirmation dialogs such as install, open/save
@@ -1246,10 +1261,12 @@ 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 sites, 4=(Block) Third-party trackers (FF63+) (default FF69+)
+ * 3=(Block) Cookies from unvisited websites, 4=(Block) Cross-site and social media trackers (FF63+) (default FF69+)
  * [NOTE] You can set exceptions under site permissions or use an extension
- * [SETTING] Privacy & Security>Content Blocking>Custom>Choose what to block>Cookies ***/
+ * [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
    [NOTE] .sessionOnly overrides .nonsecureSessionOnly except when .sessionOnly=false and
@@ -1266,20 +1283,8 @@ 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);
-/* 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/ ***/
-user_pref("dom.indexedDB.enabled", true); // [DEFAULT: true]
 /* 2730: disable offline cache ***/
 user_pref("browser.cache.offline.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 worker cache and cache storage
  * [NOTE] We clear service worker cache on exiting Firefox (see 2803)
  * [1] https://w3c.github.io/ServiceWorker/#privacy ***/
@@ -1337,6 +1342,7 @@ user_pref("privacy.cpd.sessions", true); // Active Logins
 user_pref("privacy.cpd.siteSettings", false); // Site Preferences
 /* 2805: clear Session Restore data when sanitizing on shutdown or manually [FF34+]
  * [NOTE] Not needed if Session Restore is not used (see 0102) or is already cleared with history (see 2803)
+ * [NOTE] privacy.clearOnShutdown.openWindows prevents resuming from crashes (see 1022)
  * [NOTE] privacy.cpd.openWindows has a bug that causes an additional window to open ***/
    // user_pref("privacy.clearOnShutdown.openWindows", true);
    // user_pref("privacy.cpd.openWindows", true);
@@ -1366,6 +1372,7 @@ user_pref("privacy.sanitize.timeSpan", 0);
  ** 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+)
 ***/
 user_pref("_user.js.parrot", "4000 syntax error: the parrot's pegged out");
 /* 4001: enable First Party Isolation [FF51+]
@@ -1380,8 +1387,8 @@ user_pref("privacy.firstparty.isolate", true);
  * [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); // [HIDDEN PREF]
+   // user_pref("privacy.firstparty.isolate.restrict_opener_access", true); // [DEFAULT: true]
+   // user_pref("privacy.firstparty.isolate.block_post_message", true); // [HIDDEN PREF ESR]
 
 /*** [SECTION 4500]: RFP (RESIST FINGERPRINTING)
    This master switch will be used for a wide range of items, many of which will
@@ -1410,7 +1417,8 @@ user_pref("privacy.firstparty.isolate.restrict_opener_access", true); // [DEFAUL
       FF57: The version number will match current ESR (1393283, 1418672, 1418162, 1511763)
       FF59: The OS will be reported as Windows, OSX, Android, or Linux (to reduce breakage) (1404608)
       FF66: The OS in HTTP Headers will be reduced to Windows or Android (1509829)
-      FF68: Reported OS versions updated to Windows 10, OS 10.14, and Adnroid 8.1 (1511434)
+      FF68: Reported OS versions updated to Windows 10, OS 10.14, and Android 8.1 (1511434)
+      FF78: Reported OS versions 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+)
@@ -1442,9 +1450,11 @@ user_pref("privacy.firstparty.isolate.restrict_opener_access", true); // [DEFAUL
       FF65: pointerEvent.pointerid (1492766)
  ** 1485266 - disable exposure of system colors to CSS or canvas (see 4615) (FF67+)
  ** 1407366 - enable inner window letterboxing (see 4504) (FF67+)
- ** 1540726 - return "light" with prefers-color-scheme (FF67+)
+ ** 1494034 - return "light" with prefers-color-scheme (see 4616) (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+)
 ***/
 user_pref("_user.js.parrot", "4500 syntax error: the parrot's popped 'is clogs");
 /* 4501: enable privacy.resistFingerprinting [FF41+]
@@ -1571,6 +1581,9 @@ user_pref("dom.w3c_pointer_events.enabled", false);
    // [SETUP-CHROME] Might affect CSS in themes and extensions
    // [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=232227,1330876
 user_pref("ui.use_standins_for_native_colors", true);
+// 4616: enforce prefers-color-scheme as light [FF67+]
+   // 0=light, 1=dark : This overrides your OS value
+user_pref("ui.systemUsesDarkTheme", 0); // [HIDDEN PREF]
 // * * * /
 // ***/
 
@@ -1615,8 +1628,6 @@ user_pref("_user.js.parrot", "5000 syntax error: this is an ex-parrot!");
    // user_pref("browser.tabs.warnOnOpen", false);
    // user_pref("full-screen-api.warning.delay", 0);
    // user_pref("full-screen-api.warning.timeout", 0);
-   // user_pref("general.warnOnAboutConfig", false);
-   // user_pref("browser.aboutConfig.showWarning", false); // [FF67+]
 /* APPEARANCE ***/
    // user_pref("browser.download.autohideButton", false); // [FF57+]
    // user_pref("toolkit.cosmeticAnimations.enabled", false); // [FF55+]
@@ -1630,149 +1641,29 @@ user_pref("_user.js.parrot", "5000 syntax error: this is an ex-parrot!");
    // 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("general.autoScroll", false); // middle-click enabling auto-scrolling [DEFAULT: false on Linux]
    // user_pref("ui.key.menuAccessKey", 0); // disable alt key toggling the menu bar [RESTART]
    // user_pref("view_source.tab", false); // view "page/selection source" in a new window [FF68+, FF59 and under]
+/* UX FEATURES: disable and hide the icons and menus ***/
+   // user_pref("browser.messaging-system.whatsNewPanel.enabled", false); // What's New [FF69+]
+   // user_pref("extensions.pocket.enabled", false); // Pocket Account [FF46+]
+   // user_pref("identity.fxaccounts.enabled", false); // Firefox Accounts & Sync [FF60+] [RESTART]
+   // user_pref("reader.parse-on-load.enabled", false); // Reader View
 /* OTHER ***/
    // user_pref("browser.bookmarks.max_backups", 2);
    // user_pref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.addons", false); // disable CFR [FF67+]
       // [SETTING] General>Browsing>Recommend extensions as you browse
    // user_pref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.features", false); // disable CFR [FF67+]
       // [SETTING] General>Browsing>Recommend features as you browse
-   // user_pref("extensions.pocket.enabled", false); // disable and hide Pocket [FF46+]
-   // 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)
 
 /*** [SECTION 9999]: DEPRECATED / REMOVED / LEGACY / RENAMED
-     Documentation denoted as [-]. Items deprecated prior to FF61 have been archived at [1], which
-     also provides a link-clickable, viewer-friendly version of the deprecated bugzilla tickets
+     Documentation denoted as [-]. Items deprecated in FF68 or earlier have been archived at [1],
+     which also provides a link-clickable, viewer-friendly version of the deprecated bugzilla tickets
      [1] https://github.com/ghacksuserjs/ghacks-user.js/issues/123
 ***/
 user_pref("_user.js.parrot", "9999 syntax error: the parrot's deprecated!");
-/* ESR60.x still uses all the following prefs
-// [NOTE] replace the * with a slash in the line above to re-enable them
-// FF61
-// 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);
-// * * * /
-// FF62
-// 1803: disable Java plugin
-   // [-] (part5) https://bugzilla.mozilla.org/1461243
-user_pref("plugin.state.java", 0);
-// * * * /
-// FF63
-// 0205: disable GeoIP-based search results
-   // [NOTE] May not be hidden if Firefox has changed your settings due to your locale
-   // [-] https://bugzilla.mozilla.org/1462015
-user_pref("browser.search.countryCode", "US"); // [HIDDEN PREF]
-// 0301a: disable auto-update checks for Firefox
-   // [SETTING] General>Firefox Updates>Never check for updates
-   // [-] https://bugzilla.mozilla.org/1420514
-   // user_pref("app.update.enabled", false);
-// 0503: disable "Savant" Shield study [FF61+]
-   // [-] https://bugzilla.mozilla.org/1457226
-user_pref("shield.savant.enabled", false);
-// 1031: disable favicons in tabs and new bookmarks - merged into browser.chrome.site_icons
-   // [-] https://bugzilla.mozilla.org/1453751
-   // user_pref("browser.chrome.favicons", false);
-// 2030: disable autoplay of HTML5 media - replaced by media.autoplay.default
-   // This may break video playback on various sites
-   // [-] https://bugzilla.mozilla.org/1470082
-user_pref("media.autoplay.enabled", false);
-// 2704: set cookie lifetime in days (see 2703)
-   // [-] https://bugzilla.mozilla.org/1457170
-   // user_pref("network.cookie.lifetime.days", 90); // [DEFAULT: 90]
-// 5000's: enable "Ctrl+Tab cycles through tabs in recently used order" - replaced by browser.ctrlTab.recentlyUsedOrder
-   // [-] https://bugzilla.mozilla.org/1473595
-   // user_pref("browser.ctrlTab.previews", true);
-// * * * /
-// FF64
-// 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
-   // [-] https://bugzilla.mozilla.org/1462415
-user_pref("browser.onboarding.enabled", false);
-// 2608: disable WebIDE ADB extension downloads - both renamed
-   // [1] https://trac.torproject.org/projects/tor/ticket/16222
-   // [-] https://bugzilla.mozilla.org/1491315
-user_pref("devtools.webide.autoinstallADBHelper", false);
-user_pref("devtools.webide.adbAddonURL", "");
-// 2681: disable CSP violation events [FF59+]
-   // [1] https://developer.mozilla.org/docs/Web/API/SecurityPolicyViolationEvent
-   // [-] https://bugzilla.mozilla.org/1488165
-user_pref("security.csp.enable_violation_events", false);
-// * * * /
-// FF65
-// 0850a: disable location bar autocomplete and suggestion types
-   // If you enforce any of the suggestion types (see the other 0850a), 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
-   // [-] https://bugzilla.mozilla.org/1502392
-user_pref("browser.urlbar.autocomplete.enabled", false);
-// 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)
-   // [-] https://bugzilla.mozilla.org/1510580
-user_pref("browser.fixup.hide_user_pass", true); // [DEFAULT: true]
-// * * * /
-// FF66
-// 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
-   // [-] https://bugzilla.mozilla.org/1509888
-user_pref("browser.chrome.errorReporter.enabled", false);
-user_pref("browser.chrome.errorReporter.submitUrl", "");
-// 0502: disable Mozilla permission to silently opt you into tests
-   // [-] https://bugzilla.mozilla.org/1415625
-user_pref("network.allow-experiments", false);
-// * * * /
-// FF67
-// 2428: enforce DOMHighResTimeStamp API
-   // [WARNING] Required for normalization of timestamps and any timer resolution mitigations
-   // [-] https://bugzilla.mozilla.org/1485264
-user_pref("dom.event.highrestimestamp.enabled", true); // [DEFAULT: true]
-// 5000's: disable CFR [FF64+] - split into two new prefs: *cfr.addons, *cfr.features
-   // [SETTING] General>Browsing>Recommend extensions as you browse
-   // [1] https://support.mozilla.org/en-US/kb/extension-recommendations
-   // [-] https://bugzilla.mozilla.org/1528953
-   // user_pref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr", false);
-// * * * /
-// FF68
-// 0105b: disable Activity Stream Legacy Snippets
-   // [-] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1546190,1540939
-user_pref("browser.newtabpage.activity-stream.disableSnippets", true);
-user_pref("browser.aboutHomeSnippets.updateUrl", "");
-// 0307: disable auto updating of lightweight themes (LWT)
-   // Not to be confused with themes in 0301* + 0302*, which use the FF55+ Theme API
-   // Mozilla plan to convert existing LWTs and remove LWT support in the future, see [1]
-   // [1] https://blog.mozilla.org/addons/2018/09/20/future-themes-here/
-   // [-] (part3b) https://bugzilla.mozilla.org/1525762
-user_pref("lightweightThemes.update.enabled", false);
-// 2682: enable CSP 1.1 experimental hash-source directive [FF29+]
-   // [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=855326,883975
-   // [-] https://bugzilla.mozilla.org/1386214
-user_pref("security.csp.experimentalEnabled", true);
-// * * * /
-// ***/
-
 /* ESR68.x still uses all the following prefs
 // [NOTE] replace the * with a slash in the line above to re-enable them
 // FF69
@@ -1781,11 +1672,61 @@ user_pref("security.csp.experimentalEnabled", true);
    // 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 in FF25+]
+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%/");
+// * * * /
 // ***/
 
 /* END: internal custom pref to test for syntax errors ***/