76 final, save some bytes in RFP section

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

scratchpad-scripts/troubleshooter.js

@@ -1,5 +1,5 @@
 
-/*** ghacks-user.js troubleshooter.js v1.6.0 ***/
+/*** ghacks-user.js troubleshooter.js v1.6.1 ***/
 
 (function() {
 
@@ -107,7 +107,7 @@
   ]
 
   // any runtime-set pref that everyone will have and that can be safely reset
-  const oFILLER = { type: 64, name: 'extensions.blocklist.pingCountTotal', value: -1 };
+  const oFILLER = { type: 64, name: 'app.update.lastUpdateTime.browser-cleanup-thumbnails', value: 1580000000 };
 
   function getMyList(arr) {
     const aRet = [];

user.js

@@ -1,7 +1,7 @@
 /******
 * name: ghacks user.js
-* date: 15 April 2020
+* date: 24 May 2020
-* version 75-beta
+* version 76
 * 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
@@ -168,7 +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
@@ -270,12 +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/
+ * [1] https://blog.mozilla.org/security/2015/03/03/revoking-intermediate-certificates-introducing-onecrl/ ***/
- * [2] https://trac.torproject.org/projects/tor/ticket/16931 ***/
 user_pref("extensions.blocklist.enabled", true); // [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
@@ -736,6 +736,10 @@ 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 [WARNING: do not meddle with your cipher suite: see the section 1200 intro] ***/
 /* 1261: disable 3DES (effective key size < 128)
@@ -777,7 +781,7 @@ user_pref("security.insecure_connection_text.enabled", true); // [FF60+]
 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
@@ -1130,7 +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", "");
@@ -1408,12 +1412,13 @@ user_pref("privacy.firstparty.isolate", true);
       This spoof *shouldn't* affect core chrome/Firefox performance
  ** 1217238 - reduce precision of time exposed by javascript (FF55+)
  ** 1369303 - spoof/disable performance API (see 2410-deprecated, 4602, 4603) (FF56+)
- ** 1333651 & 1383495 & 1396468 - spoof Navigator API (see section 4700) (FF56+)
+ ** 1333651 & 1383495 & 1396468 - spoof User Agent & Navigator API (see section 4700) (FF56+)
-      FF56: The version number will be rounded down to the nearest multiple of 10
+      FF56: Version: rounded down to the nearest multiple of 10
-      FF57: The version number will match current ESR (1393283, 1418672, 1418162, 1511763)
+      FF57: Version: match current ESR (1393283, 1418672, 1418162, 1511763)
-      FF59: The OS will be reported as Windows, OSX, Android, or Linux (to reduce breakage) (1404608)
+      FF59: OS: Windows, OSX, Android, or Linux (to reduce breakage) (1404608)
-      FF66: The OS in HTTP Headers will be reduced to Windows or Android (1509829)
+      FF66: OS: HTTP Headers reduced to Windows or Android (1509829)
-      FF68: Reported OS versions updated to Windows 10, OS 10.14, and Adnroid 8.1 (1511434)
+      FF68: OS: updated to Windows 10, OS 10.14, and Android 8.1 (1511434)
+      FF78: OS: updated to OS 10.15 and Android 9.0 (1635011)
  ** 1369319 - disable device sensor API (see 4604) (FF56+)
  ** 1369357 - disable site specific zoom (see 4605) (FF56+)
  ** 1337161 - hide gamepads from content (see 4606) (FF56+)
@@ -1427,7 +1432,7 @@ user_pref("privacy.firstparty.isolate", true);
  ** 1354633 - limit MediaError.message to a whitelist (FF57+)
  ** 1382533 - enable fingerprinting resistance for Presentation API (FF57+)
       This blocks exposure of local IP Addresses via mDNS (Multicast DNS)
- **  967895 - enable site permission prompt before allowing canvas data extraction (FF58+)
+ **  967895 - spoof canvas and enable site permission prompt before allowing canvas data extraction (FF58+)
       FF59: Added to site permissions panel (1413780) Only prompt when triggered by user input (1376865)
  ** 1372073 - spoof/block fingerprinting in MediaDevices API (FF59+)
       Spoof: enumerate devices reports one "Internal Camera" and one "Internal Microphone" if
@@ -1450,6 +1455,7 @@ user_pref("privacy.firstparty.isolate", true);
  ** 1564422 - spoof audioContext outputLatency (FF70+)
  ** 1595823 - spoof audioContext sampleRate (FF72+)
  ** 1607316 - spoof pointer as coarse and hover as none (ANDROID) (FF74+)
+ ** 1621433 - randomize canvas (previously FF58+ returned an all-white canvas) (FF78+)
 ***/
 user_pref("_user.js.parrot", "4500 syntax error: the parrot's popped 'is clogs");
 /* 4501: enable privacy.resistFingerprinting [FF41+]
@@ -1716,6 +1722,12 @@ user_pref("privacy.userContext.longPressBehavior", 2);
    // [-] 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 ***/