make up yer mind

stick it back in for two releases - pref gets removed in FF65 anyway

README.md

@@ -1,14 +1,14 @@
-### ![](https://github.com/ghacksuserjs/ghacks-user.js/blob/master/wikipiki/bullet01.png) user.js
+### ![][b] user.js
 A `user.js` is a configuration file that can control hundreds of Firefox settings. For a more technical breakdown and explanation, you can read more on the [overview](https://github.com/ghacksuserjs/ghacks-user.js/wiki/1.1-Overview) wiki page.
 
-### ![](https://github.com/ghacksuserjs/ghacks-user.js/blob/master/wikipiki/bullet01.png) ghacks user.js
-The `ghacks user.js` is a **template**, which, as provided, aims to provide as much privacy and enhanced security as possible, and to reduce tracking and fingerprinting as much as possible - while minimizing any loss of functionality and breakage (but it will happen).
+### ![][b] ghacks user.js
+The `ghacks user.js` is a **template** which aims to provide as much privacy and enhanced security as possible, and to reduce tracking and fingerprinting as much as possible - while minimizing any loss of functionality and breakage (but it will happen).
 
 Everyone, experts included, should at least read the [implementation](https://github.com/ghacksuserjs/ghacks-user.js/wiki/1.3-Implementation) wiki page, as it contains important information regarding a few `ghacks user.js` settings.
 
 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)
 
-### ![](https://github.com/ghacksuserjs/ghacks-user.js/blob/master/wikipiki/bullet01.png) acknowledgments
+### ![][b] acknowledgments
 Literally thousands of sources, references and suggestions. That said...
 
 * Martin Brinkmann at [ghacks](https://www.ghacks.net/) <sup>1</sup>
@@ -18,4 +18,6 @@ Literally thousands of sources, references and suggestions. That said...
 
 <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.
 
-### ![](https://github.com/ghacksuserjs/ghacks-user.js/blob/master/wikipiki/bullet01.png) [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
+### ![][b] [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
+
+[b]: https://raw.githubusercontent.com/ghacksuserjs/ghacks-user.js/master/wikipiki/bullet01.png

_config.yml

@@ -1 +1,3 @@
-theme: jekyll-theme-midnight
+theme: jekyll-theme-midnight
+title: ghacks-user.js
+description: An ongoing comprehensive user.js template for configuring and hardening Firefox privacy, security and anti-fingerprinting

user.js

@@ -1,8 +1,8 @@
 /******
 * name: ghacks user.js
-* date: 10 October 2018
-* version 62: Total Eclipse of the Pants
-*   "Once upon a time there was light in my life, but now there's only pants in the dark"
+* date: 13 November 2018
+* version 63-beta: Pants Romance
+*   "Rah rah ah-ah-ah! Ro mah ro-mah-mah. Gaga oh-la-la! Want your pants romance"
 * 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
@@ -90,7 +90,6 @@ user_pref("permissions.default.geo", 2); // 0=always ask (default), 1=allow, 2=b
  * [NOTE] May not be hidden if Firefox has changed your settings due to your locale
  * [1] https://trac.torproject.org/projects/tor/ticket/16254
  * [2] https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_geolocation-for-default-search-engine ***/
-user_pref("browser.search.countryCode", "US"); // (hidden pref)
 user_pref("browser.search.region", "US"); // (hidden pref)
 user_pref("browser.search.geoip.url", "");
 /* 0205: set OS & APP locale (FF59+)
@@ -119,16 +118,11 @@ user_pref("geo.wifi.uri", "https://location.services.mozilla.com/v1/geolocate?ke
      monetized extensions, time constraints, legacy issues, and fear of breakage/bugs.
      It is still important to do updates for security reasons, please do so manually. ***/
 user_pref("_user.js.parrot", "0300 syntax error: the parrot's not pinin' for the fjords!");
-/* 0301a: disable auto-update checks for Firefox
- * [NOTE] Firefox currently checks every 12 hrs and allows 8 day notification dismissal
- * [SETTING] General>Firefox Updates>Never check for updates ***/
-   // user_pref("app.update.enabled", false);
 /* 0301b: disable auto-update checks for extensions
  * [SETTING] about:addons>Extensions>[cog-wheel-icon]>Update Add-ons Automatically (toggle) ***/
    // user_pref("extensions.update.enabled", false);
-/* 0302a: disable auto update installing for Firefox (after the check in 0301a)
- * [SETTING] General>Firefox Updates>Check for updates but let you choose...
- * [NOTE] The UI checkbox also controls the behavior for checking, the pref only controls auto installing ***/
+/* 0302a: disable auto update installing for Firefox
+ * [SETTING] General>Firefox Updates>Check for updates but let you choose... ***/
 user_pref("app.update.auto", false);
 /* 0302b: disable auto update installing for extensions (after the check in 0301b)
  * [SETTING] about:addons>Extensions>[cog-wheel-icon]>Update Add-ons Automatically (toggle) ***/
@@ -218,25 +212,23 @@ user_pref("_user.js.parrot", "0400 syntax error: the parrot's passed on!");
  * [2] https://trac.torproject.org/projects/tor/ticket/16931 ***/
 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%/");
-/* 0402: enable Kinto blocklist updates (FF50+)
+/* 0403: disable individual unwanted/unneeded parts of the Kinto blocklists
  * What is Kinto?: https://wiki.mozilla.org/Firefox/Kinto#Specifications
  * As Firefox transitions to Kinto, the blocklists have been broken down into entries for certs to be
  * revoked, extensions and plugins to be disabled, and gfx environments that cause problems or crashes ***/
-user_pref("services.blocklist.update_enabled", true);
-/* 0403: disable individual unwanted/unneeded parts of the Kinto blocklists ***/
    // user_pref("services.blocklist.onecrl.collection", ""); // revoked certificates
    // user_pref("services.blocklist.addons.collection", "");
    // user_pref("services.blocklist.plugins.collection", "");
    // user_pref("services.blocklist.gfx.collection", "");
 
 /** SAFE BROWSING (SB)
-    This sub-section has been redesigned to differentiate between "real-time"/"user initiated"
-    data being sent to Google from all other settings such as using local blocklists/whitelists and
-    updating those lists. There are NO privacy issues here. *IF* required, a full url is never sent
-    to Google, only a PART-hash of the prefix, and this is hidden with noise of other real PART-hashes.
-    Google also swear it is anonymized and only used to flag malicious sites/activity. Firefox
-    also takes measures such as striping out identifying parameters and storing safe browsing
-    cookies in a separate jar. (#Turn on browser.safebrowsing.debug to monitor this activity)
+    This sub-section has been redesigned to differentiate between "real-time"/"user initiated" data
+    being sent to Google from all other settings such as using local blocklists/whitelists and updating
+    those lists. There are NO privacy issues here. *IF* required, a full url is never sent to Google,
+    only a PART-hash of the prefix, and this is hidden with noise of other real PART-hashes. Google also
+    swear it is anonymized and only used to flag malicious sites/activity. Firefox also takes measures
+    such as striping out identifying parameters and storing safe browsing cookies in a separate jar.
+    SB v4 (FF57+) doesn't even use cookies. (#Turn on browser.safebrowsing.debug to monitor this activity)
     #Required reading [#] https://feeding.cloud.geek.nz/posts/how-safe-browsing-works-in-firefox/
     [1] https://wiki.mozilla.org/Security/Safe_Browsing ***/
 /* 0410: disable "Block dangerous and deceptive content" (under Options>Privacy & Security)
@@ -303,6 +295,8 @@ user_pref("browser.safebrowsing.provider.google4.dataSharingURL", "");
  * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1170190,1141814 ***/
    // user_pref("privacy.trackingprotection.annotate_channels", false);
    // user_pref("privacy.trackingprotection.lower_network_priority", false);
+/* 0426: enforce Content Blocking (required to block cookies) (FF63+) ***/
+user_pref("browser.contentblocking.enabled", true); // default: true
 
 /*** 0500: SYSTEM ADD-ONS / EXPERIMENTS
      System Add-ons are a method for shipping extensions, considered to be
@@ -330,7 +324,6 @@ user_pref("network.allow-experiments", false);
 user_pref("app.normandy.enabled", false);
 user_pref("app.normandy.api_url", "");
 user_pref("app.shield.optoutstudies.enabled", false);
-user_pref("shield.savant.enabled", false); // (FF61+)
 /* 0505: disable System Add-on updates
  * [NOTE] In FF61 and lower, you will not get any System Add-on updates except when you update Firefox ***/
    // user_pref("extensions.systemAddon.update.enabled", false); // (FF62+)
@@ -343,18 +336,28 @@ user_pref("browser.ping-centre.telemetry", false);
  * [1] https://en.wikipedia.org/wiki/Pocket_(application)
  * [2] https://www.gnu.gl/blog/Posts/multiple-vulnerabilities-in-pocket/ ***/
 user_pref("extensions.pocket.enabled", false);
-/* 0513: disable Follow On Search (FF53+)
- * Just DELETE the XPI file in your System Add-ons directory
- * [1] https://blog.mozilla.org/data/2017/06/05/measuring-search-in-firefox/ ***/
 /* 0514: disable Activity Stream (FF54+)
  * Activity Stream is the default homepage/newtab in FF57+. It is based on metadata and browsing behavior,
  * and includes telemetry and web content such as snippets, top stories (pocket), top sites, etc.
  *  - ONE: make sure to set your "home" and "newtab" to about:blank (or use an extension to control them)
  *  - TWO: DELETE the XPI file in your System Add-ons directory (note this get reinstalled on app updates)
  * And/or you can try to control the ever-growing, ever-changing "browser.newtabpage.activity-stream.*" prefs
+ * [FF63+] Activity Stream (AS) is now builtin and no longer an easily deletable system addon!
+ *     We'll clean this up and move to a new number when ESR67 is released.
  * [1] https://wiki.mozilla.org/Firefox/Activity_Stream
  * [2] https://www.ghacks.net/2016/02/15/firefox-mockups-show-activity-stream-new-tab-page-and-share-updates/ ***/
 user_pref("browser.library.activity-stream.enabled", false); // (FF57+)
+/* 0514a: disable AS Snippets ***/
+user_pref("browser.newtabpage.activity-stream.disableSnippets", true);
+user_pref("browser.newtabpage.activity-stream.feeds.snippets", false); // [SETTING] Home>Firefox Home Content>Snippets
+/* 0514b: disable AS Top Stories and other 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); // [SETTING] Home>Firefox Home Content>Highlights>Pages Saved to Pocket
+user_pref("browser.newtabpage.activity-stream.showSponsored", false);
+/* 0514c: disable AS 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", "");
 /* 0515: disable Screenshots (FF55+)
  * alternatively in FF60+, disable uploading to the Screenshots server
  * [1] https://github.com/mozilla-services/screenshots
@@ -468,6 +471,14 @@ user_pref("network.proxy.autoconfig_url.include_path", false); // default: false
 /* 0709: disable using UNC (Uniform Naming Convention) paths (FF61+)
  * [1] https://trac.torproject.org/projects/tor/ticket/26424 ***/
 user_pref("network.file.disable_unc_paths", true); // (hidden pref)
+/* 0710: disable GIO as a potential proxy bypass vector
+ * Gvfs/GIO has a set of supported protocols like obex, network, archive, computer, dav, cdda,
+ * gphoto2, trash, etc. By default only smb and sftp protocols are accepted so far (as of FF64)
+ * [1] https://bugzilla.mozilla.org/1433507
+ * [2] https://trac.torproject.org/23044
+ * [3] https://en.wikipedia.org/wiki/GVfs
+ * [4] https://en.wikipedia.org/wiki/GIO_(software) ***/
+user_pref("network.gio.supported-protocols", ""); // (hidden pref)
 
 /*** 0800: LOCATION BAR / SEARCH BAR / SUGGESTIONS / HISTORY / FORMS [SETUP]
      If you are in a private environment (no unwanted eyeballs) and your device is private
@@ -683,7 +694,6 @@ user_pref("browser.shell.shortcutFavicons", false);
 /* 1031: disable favicons in tabs and new bookmarks
  * bookmark favicons are stored as data blobs in favicons.sqlite ***/
    // user_pref("browser.chrome.site_icons", false);
-   // user_pref("browser.chrome.favicons", false);
 /* 1032: disable favicons in web notifications ***/
 user_pref("alerts.showFavicons", false); // default: false
 
@@ -702,10 +712,11 @@ user_pref("alerts.showFavicons", false); // default: false
 ***/
 user_pref("_user.js.parrot", "1200 syntax error: the parrot's a stiff!");
 /** SSL (Secure Sockets Layer) / TLS (Transport Layer Security) ***/
-/* 1201: disable old SSL/TLS - vulnerable to a MiTM attack
- * [WARNING] Tested Feb 2017 - still breaks too many sites
- * [1] https://wiki.mozilla.org/Security:Renegotiation ***/
-   // user_pref("security.ssl.require_safe_negotiation", true);
+/* 1201: disable old SSL/TLS "insecure" renegotiation (vulnerable to a MiTM attack)
+ * [WARNING] <2% of secure sites do NOT support the newer "secure" renegotiation, see [2]
+ * [1] https://wiki.mozilla.org/Security:Renegotiation
+ * [2] https://www.ssllabs.com/ssl-pulse/ ***/
+user_pref("security.ssl.require_safe_negotiation", true);
 /* 1202: control TLS versions with min and max
  * 1=min version of TLS 1.0, 2=min version of TLS 1.1, 3=min version of TLS 1.2 etc
  * [NOTE] Jul-2017: Telemetry indicates approx 2% of TLS web traffic uses 1.0 or 1.1
@@ -813,7 +824,7 @@ user_pref("security.pki.sha1_enforcement_level", 1);
    // user_pref("security.ssl3.rsa_aes_256_sha", false);
 
 /** UI (User Interface) ***/
-/* 1270: display warning (red padlock) for "broken security"
+/* 1270: display warning (red padlock) for "broken security" (see 1201)
  * [1] https://wiki.mozilla.org/Security:Renegotiation ***/
 user_pref("security.ssl.treat_unsafe_negotiation_as_broken", true);
 /* 1271: control "Add Security Exception" dialog on SSL warnings
@@ -848,9 +859,11 @@ user_pref("browser.display.use_document_fonts", 0);
    // user_pref("font.name.sans-serif.x-western", "Arial"); // default: Arial
    // user_pref("font.name.monospace.x-unicode", "Lucida Console");
    // user_pref("font.name.monospace.x-western", "Lucida Console"); // default: Courier New
-/* 1403: enable icon fonts (glyphs) (FF41+)
- * [1] https://bugzilla.mozilla.org/789788 ***/
-user_pref("gfx.downloadable_fonts.enabled", true); // default: true
+/* 1403: disable icon fonts (glyphs) (FF41) and local fallback rendering
+ * [1] https://bugzilla.mozilla.org/789788
+ * [2] https://trac.torproject.org/projects/tor/ticket/8455 ***/
+   // user_pref("gfx.downloadable_fonts.enabled", false);
+   // user_pref("gfx.downloadable_fonts.fallback_delay", -1);
 /* 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);
@@ -885,7 +898,7 @@ user_pref("gfx.font_rendering.graphite.enabled", false);
      use the site and then change the values back. If you visit those sites regularly (e.g. Vimeo), use an extension.
 
                     full URI: https://example.com:8888/foo/bar.html?id=1234
-       scheme+host+path+port: https://example.com:8888/foo/bar.html
+       scheme+host+port+path: https://example.com:8888/foo/bar.html
             scheme+host+port: https://example.com:8888
 
      #Required reading [#] https://feeding.cloud.geek.nz/posts/tweaking-referrer-for-privacy-in-firefox/
@@ -895,13 +908,13 @@ user_pref("_user.js.parrot", "1600 syntax error: the parrot rests in peace!");
  * 0=never, 1=send only when links are clicked, 2=for links and images (default) ***/
 user_pref("network.http.sendRefererHeader", 2);
 /* 1602: ALL: control the amount of information to send
- * 0=send full URI (default), 1=scheme+host+path+port, 2=scheme+host+port ***/
+ * 0=send full URI (default), 1=scheme+host+port+path, 2=scheme+host+port ***/
 user_pref("network.http.referer.trimmingPolicy", 0);
 /* 1603: CROSS ORIGIN: control when to send a referer [SETUP]
  * 0=always (default), 1=only if base domains match, 2=only if hosts match ***/
 user_pref("network.http.referer.XOriginPolicy", 1);
 /* 1604: CROSS ORIGIN: control the amount of information to send (FF52+)
- * 0=send full URI (default), 1=scheme+host+path+port, 2=scheme+host+port ***/
+ * 0=send full URI (default), 1=scheme+host+port+path, 2=scheme+host+port ***/
 user_pref("network.http.referer.XOriginTrimmingPolicy", 0);
 /* 1605: ALL: disable spoofing a referer
  * [WARNING] Spoofing effectively disables the anti-CSRF (Cross-Site Request Forgery) protections that some sites may rely on ***/
@@ -1032,9 +1045,10 @@ user_pref("dom.imagecapture.enabled", false); // default: false
 /* 2028: disable offscreen canvas (FF44+)
  * [1] https://developer.mozilla.org/docs/Web/API/OffscreenCanvas ***/
 user_pref("gfx.offscreencanvas.enabled", false); // default: false
-/* 2030: disable auto-play of HTML5 media
+/* 2030: disable auto-play of HTML5 media (FF63+)
+ * 0=Allowed (default), 1=Blocked, 2=Prompt
  * [WARNING] This may break video playback on various sites ***/
-user_pref("media.autoplay.enabled", false);
+user_pref("media.autoplay.default", 1);
 /* 2031: disable audio auto-play in non-active tabs (FF51+)
  * [1] https://www.ghacks.net/2016/11/14/firefox-51-blocks-automatic-audio-playback-in-non-active-tabs/ ***/
 user_pref("media.block-autoplay-until-in-foreground", true);
@@ -1200,6 +1214,11 @@ user_pref("dom.webaudio.enabled", false);
 /* 2516: disable PointerEvents
  * [1] https://developer.mozilla.org/en-US/docs/Web/API/PointerEvent ***/
 user_pref("dom.w3c_pointer_events.enabled", false);
+/* 2517: disable Media Capabilities API (FF63+)
+ * [WARNING] This *may* affect media performance if disabled, no one is sure
+ * [1] https://github.com/WICG/media-capabilities
+ * [2] https://wicg.github.io/media-capabilities/#security-privacy-considerations ***/
+   // user_pref("media.media-capabilities.enabled", false);
 
 /*** 2600: MISCELLANEOUS ***/
 user_pref("_user.js.parrot", "2600 syntax error: the parrot's run down the curtain!");
@@ -1345,7 +1364,9 @@ user_pref("security.dialog_enable_delay", 700); // default: 1000 (milliseconds)
 user_pref("_user.js.parrot", "2700 syntax error: the parrot's joined the bleedin' choir invisible!");
 /* 2701: disable 3rd-party cookies and site-data [SETUP]
  * You can set exceptions under site permissions or use an extension
- * 0=allow all 1=allow same host 2=disallow all 3=allow 3rd party if it already set a cookie
+ * 0=Accept cookies and site data, 1=Block third-party cookies, 2=Block all cookies,
+ * 3=Block cookies from unvisited sites, 4=Block third-party trackers (FF63+)
+ * [NOTE] value 4 is tied to the Tracking Protection lists so make sure you have 0424 + 0425 on default values!
  * [SETTING] Privacy & Security>History>Custom Settings>Accept cookies from sites
  * [NOTE] Blocking 3rd party controls 3rd party access to localStorage, IndexedDB, Cache API and Service Worker Cache.
  * Blocking 1st party controls access to localStorage and IndexedDB (note: Service Workers can still use IndexedDB).
@@ -1360,11 +1381,10 @@ user_pref("network.cookie.cookieBehavior", 1);
 user_pref("network.cookie.thirdparty.sessionOnly", true);
 user_pref("network.cookie.thirdparty.nonsecureSessionOnly", true); // (FF58+)
 /* 2703: set cookie lifetime policy
- * 0=until they expire (default), 2=until you close Firefox, 3=for n days (see next pref)
+ * 0=until they expire (default), 2=until you close Firefox
+ * [NOTE] 3=for n days : no longer supported in FF63+ (see 2704-deprecated)
  * [SETTING] Privacy & Security>History>Custom Settings>Accept cookies from sites>Keep until ***/
    // user_pref("network.cookie.lifetimePolicy", 0);
-/* 2704: set cookie lifetime in days (see above pref) - default is 90 days ***/
-   // user_pref("network.cookie.lifetime.days", 90);
 /* 2705: disable HTTP sites setting cookies with the "secure" directive (FF52+)
  * [1] https://developer.mozilla.org/Firefox/Releases/52#HTTP ***/
 user_pref("network.cookie.leave-secure-alone", true); // default: true
@@ -1385,8 +1405,7 @@ user_pref("network.cookie.leave-secure-alone", true); // default: true
  * via an extenion. Note that IDB currently cannot be sanitized by host.
  * [1] https://blog.mozilla.org/addons/2018/08/03/new-backend-for-storage-local-api/ ***/
 user_pref("dom.indexedDB.enabled", true); // default: true
-/* 2730: disable offline cache
- * [NOTE] For FF51-FF60 (ESR not included), this is required 'true' for Storage API (2750) ***/
+/* 2730: disable offline cache ***/
 user_pref("browser.cache.offline.enable", false);
 /* 2730b: disable offline cache on insecure sites (FF60+)
  * [1] https://blog.mozilla.org/security/2018/02/12/restricting-appcache-secure-contexts/ ***/
@@ -1402,7 +1421,6 @@ user_pref("dom.caches.enabled", false);
  * The API gives sites the ability to find out how much space they can use, how much
  * they are already using, and even control whether or not they need to be alerted
  * before the user agent disposes of site data in order to make room for other things.
- * [NOTE] For FF51-FF60 (ESR not included), if Storage API is enabled, then Offline Cache (2730) must be also be enabled
  * [1] https://developer.mozilla.org/docs/Web/API/StorageManager
  * [2] https://developer.mozilla.org/docs/Web/API/Storage_API
  * [3] https://blog.mozilla.org/l10n/2017/03/07/firefox-l10n-report-aurora-54/ ***/
@@ -1474,6 +1492,7 @@ user_pref("privacy.sanitize.timeSpan", 0);
  ** 1344170 - isolate blob: URI (FF55+)
  ** 1300671 - isolate data:, about: URLs (FF55+)
  ** 1473247 - isolate IP addresses (FF63+)
+ ** 1492607 - isolate postMessage with targetOrigin "*" (requires 4002) (FF65+)
 
  NOTE: FPI has some issues depending on your Firefox release
  ** 1418931 - [fixed in FF58+] IndexedDB (Offline Website Data) with FPI Origin Attributes
@@ -1487,8 +1506,14 @@ user_pref("_user.js.parrot", "4000 syntax error: the parrot's pegged out");
 user_pref("privacy.firstparty.isolate", true);
 /* 4002: enforce FPI restriction for window.opener (FF54+)
  * [NOTE] Setting this to false may reduce the breakage in 4001
- * [1] https://bugzilla.mozilla.org/1319773#c22 ***/
-user_pref("privacy.firstparty.isolate.restrict_opener_access", true);
+ * [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])
+ * 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); // (hidden pref)
 
 /*** 4500: privacy.resistFingerprinting (RFP)
    This master switch will be used for a wide range of items, many of which will
@@ -1656,9 +1681,10 @@ user_pref("webgl.enable-debug-renderer-info", false);
 user_pref("_user.js.parrot", "4700 syntax error: the parrot's taken 'is last bow");
 /* 4701: navigator.userAgent ***/
    // user_pref("general.useragent.override", ""); // (hidden pref)
-/* 4702: navigator.buildID (
- * reveals build time down to the second
- * [1] https://bugzilla.mozilla.org/583181 ***/
+/* 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 ***/
    // user_pref("general.appname.override", ""); // (hidden pref)
@@ -1692,10 +1718,9 @@ user_pref("_user.js.parrot", "5000 syntax error: this is an ex-parrot!");
    // user_pref("layout.spellcheckDefault", 2); // 0=none, 1-multi-line, 2=multi-line & single-line
 /* UX BEHAVIOR ***/
    // user_pref("browser.backspace_action", 2); // 0=previous page, 1=scroll up, 2=do nothing
-   // user_pref("browser.ctrlTab.previews", true);
    // user_pref("browser.tabs.closeWindowWithLastTab", false);
    // user_pref("browser.tabs.loadBookmarksInTabs", true); // open bookmarks in a new tab (FF57+)
-   // user_pref("browser.urlbar.decodeURLsOnCopy", true); // see  Bugzilla 1320061 (FF53+)
+   // user_pref("browser.urlbar.decodeURLsOnCopy", true); // see Bugzilla 1320061 (FF53+)
    // user_pref("general.autoScroll", false); // middle-click enabling auto-scrolling [WINDOWS] [MAC]
    // user_pref("ui.key.menuAccessKey", 0); // disable alt key toggling the menu bar [RESTART]
 /* OTHER ***/
@@ -2111,6 +2136,38 @@ user_pref("network.jar.open-unsafe-types", false);
    // [-] (part5) https://bugzilla.mozilla.org/1461243
 user_pref("plugin.state.java", 0);
 // * * * /
+// FF63
+// 0202: 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);
+// 0402: enable Kinto blocklist updates (FF50+)
+   // What is Kinto?: https://wiki.mozilla.org/Firefox/Kinto#Specifications
+   // As Firefox transitions to Kinto, the blocklists have been broken down into entries for certs to be
+   // revoked, extensions and plugins to be disabled, and gfx environments that cause problems or crashes
+   // [-] https://bugzilla.mozilla.org/1458917
+user_pref("services.blocklist.update_enabled", true);
+// 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 auto-play of HTML5 media - replaced by media.autoplay.default
+   // [WARNING] 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);
+// * * * /
 // ***/
 
 /* END: internal custom pref to test for syntax errors ***/

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