Update user.js

✅ Masked more builID in according to TBB
✅ reEnabled reader mode
⛔️ Disabled new cryptomining and fingerprinting trackingprotection
⛔️ Disabled javascript Ion, baseline JIT and RegExp to help harden JS against exploits (disabled in TBB, performance loss??) [need test]
ℹ️ Added some descriptions

user.js

@@ -44,7 +44,8 @@ user_pref("browser.newtabpage.activity-stream.section.highlights.includePocket",
 user_pref("browser.newtabpage.activity-stream.showSponsored", false); // [DESKTOP]
 user_pref("browser.newtabpage.activity-stream.feeds.discoverystreamfeed", false); // [DESKTOP]
 // -------------------------------------
-// Pref : Set HOME+NEWWINDOW page
+// Pref : Set first run page and HOME+NEWWINDOW page
+user_pref("startup.homepage_welcome_url", ""); // [DESKTOP]
 user_pref("browser.startup.homepage", "about:blank"); // [DESKTOP]
 // -------------------------------------
 // Pref : Disable Activity Stream Snippets
@@ -115,16 +116,14 @@ user_pref("browser.startup.homepage_override.mstone", "ignore");
 // Pref : Disable app from auto-update
 user_pref("app.update.enabled", false);
 user_pref("app.update.auto", false); // [DESKTOP]
-user_pref("app.update.autodownload", ""); // [TEST]
+user_pref("app.update.autodownload", ""); // [TEST] // [FENNEC]
-user_pref("app.update.channel", ""); // [TEST]
+user_pref("app.update.channel", "");
 user_pref("app.update.url", ""); // [DESKTOP]
 user_pref("app.update.url.details", ""); // [DESKTOP]
 user_pref("app.update.url.manual", ""); // [DESKTOP]
 user_pref("app.update.url.android", ""); // [FENNEC]
 // user_pref("app.update.timerFirstInterval", 0);
 // user_pref("app.update.timerMinimumDelay", 0);
-// user_pref("app.update.url.android", "https://aus5.mozilla.org/update/4/%PRODUCT%/%VERSION%/%BUILD_ID%/%BUILD_TARGET%/%CHANNEL%/%OS_VERSION%/%DISTRIBUTION%/%DISTRIBUTION_VERSION%/%MOZ_VERSION%/update.xml"); // [TEST]
-user_pref("app.update.service.enabled", false); // [DESKTOP]
 user_pref("app.update.silent", false); // [DESKTOP]
 user_pref("app.update.staging.enabled", false); // [DESKTOP]
 user_pref("app.update.log.file", false); // [DESKTOP]
@@ -696,11 +695,6 @@ user_pref("devtools.chrome.enabled", false);
 // https://bugzilla.mozilla.org/1173199
 user_pref("mathml.disabled", true);
 // -------------------------------------
-// Pref : Disable in-content SVG (Scalable Vector Graphics)
-// [SETUP-WEB] Expect breakage incl. youtube player controls. Best left for a "hardened" profile.
-// https://bugzilla.mozilla.org/1216893
-// user_pref("svg.disabled", true);
-// -------------------------------------
 // Pref : Disable middle mouse click paste
 // This preference determines how to handle middle clicks in text fields. 
 // Useless on Android
@@ -860,6 +854,12 @@ user_pref("ui.use_standins_for_native_colors", true); // [DESKTOP]
 // Pref : Remove special permissions for certain mozilla domains
 // resource://app/defaults/permissions
 user_pref("permissions.manager.defaultsUrl", ""); // [DESKTOP]
+// -------------------------------------
+// Pref : Disable in-content SVG rendering
+// Disabling SVG support breaks many UI elements on many sites incl. youtube player controls
+// https://bugzilla.mozilla.org/show_bug.cgi?id=1216893
+// https://github.com/iSECPartners/publications/raw/master/reports/Tor%20Browser%20Bundle/Tor%20Browser%20Bundle%20-%20iSEC%20Deliverable%201.3.pdf#16
+// user_pref("svg.disabled", true);
 //
 // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 // Section : Web Workers
@@ -930,11 +930,13 @@ user_pref("dom.vibrator.enabled", false);
 // https://rh0dev.github.io/blog/2017/the-return-of-the-jit/
 user_pref("javascript.options.asmjs", false);
 // -------------------------------------
-// Pref : Disable Ion and baseline JIT to help harden JS against exploits
+// Pref : Disable Ion, baseline JIT and RegExp to help harden JS against exploits
 // If false, causes the odd site issue and there is also a performance loss
 // https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0817
-// user_pref("javascript.options.ion", false);
+// https://trac.torproject.org/projects/tor/ticket/26019
-// user_pref("javascript.options.baselinejit", false);
+user_pref("javascript.options.ion", false);
+user_pref("javascript.options.baselinejit", false);
+user_pref("javascript.options.native_regexp", false);
 // -------------------------------------
 // Pref : Disable WebAssembly
 // https://webassembly.org/
@@ -966,8 +968,11 @@ user_pref("dom.targetBlankNoOpener.enabled", true); // [DEFAULT: false]
 // Pref : Don't reveal build ID
 // Value taken from Tor Browser
 // https://bugzilla.mozilla.org/show_bug.cgi?id=583181
-user_pref("general.buildID.override", "20100101"); // [DESKTOP]
+user_pref("general.buildID.override", "20100101");
-user_pref("browser.startup.homepage_override.buildID", "20100101"); // [DESKTOP]
+user_pref("browser.startup.homepage_override.buildID", "20100101");
+user_pref("media.gmp-manager.buildID", "20190307010101"); // [DESKTOP]
+user_pref("extensions.lastAppBuildID", "20190307010101");
+user_pref("browser.sessionstore.upgradeBackup.latestBuildID", "20190307010101"); // [DESKTOP]
 // -------------------------------------
 // Pref : Disable Archive API
 // https://wiki.mozilla.org/WebAPI/ArchiveAPI
@@ -1756,7 +1761,6 @@ user_pref("geo.wifi.logging.enabled", false); // [HIDDEN PREF] // [DESKTOP]
 // >>>>>>>>>>>>>>>>>>>>>>
 // Pref : Disable websites choosing fonts (0=block, 1=allow)
 // If you disallow fonts, this drastically limits/reduces font enumeration (by JS) which is a high entropy fingerprinting vector.
-// [NOTE] You can do this with uBlock Origin
 // [NOTE] Disabling fonts can uglify the web a fair bit.
 // https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/
 user_pref("browser.display.use_document_fonts", 0);
@@ -1960,6 +1964,29 @@ user_pref("privacy.trackingprotection.enabled", false);
 user_pref("privacy.trackingprotection.pbmode.enabled", false);
 user_pref("privacy.trackingprotection.introURL", ""); // [DESKTOP]
 // -------------------------------------
+// Pref : Disable cryptomining trackingprotection
+// [NOTE] uBlock is far superior and you can customize the lists as you wish
+// https://m.wiki.mozilla.org/Security/Tracking_protection#Lists
+// https://github.com/AdroitAdorKhan/EnergizedProtection
+// https://github.com/theel0ja/firefox-recommendations/blob/master/README.md
+// https://github.com/hoshsadiq/adblock-nocoin-list
+user_pref("browser.contentblocking.cryptomining.preferences.ui.enabled", false); // [DESKTOP]
+user_pref("privacy.trackingprotection.cryptomining.annotate.enabled", false);
+user_pref("privacy.trackingprotection.cryptomining.enabled", false);
+user_pref("urlclassifier.features.cryptomining.blacklistTables", "");
+user_pref("urlclassifier.features.cryptomining.whitelistTables", "");
+// -------------------------------------
+// Pref : Disable fingerprinting trackingprotection
+// [NOTE] uBlock is far superior and you can customize the lists as you wish
+// https://m.wiki.mozilla.org/Security/Tracking_protection#Lists
+// https://github.com/AdroitAdorKhan/EnergizedProtection
+// https://github.com/theel0ja/firefox-recommendations/blob/master/README.md
+user_pref("browser.contentblocking.fingerprinting.preferences.ui.enabled", false); // [DESKTOP]
+user_pref("privacy.trackingprotection.fingerprinting.annotate.enabled", false);
+user_pref("privacy.trackingprotection.fingerprinting.enabled", false);
+user_pref("urlclassifier.features.fingerprinting.blacklistTables", "");
+user_pref("urlclassifier.features.fingerprinting.whitelistTables", "");
+// -------------------------------------
 // Pref : Disable PingCentre telemetry (used in several System Add-ons)
 // Currently blocked by 'datareporting.healthreport.uploadEnabled'
 user_pref("browser.ping-centre.telemetry", false); // [DESKTOP]
@@ -2139,7 +2166,13 @@ user_pref("network.http.referer.XOriginPolicy", 2);
 // 0=send full URI (default), 1=scheme+host+port+path, 2=scheme+host+port
 user_pref("network.http.referer.XOriginTrimmingPolicy", 2);
 // -------------------------------------
-// Pref : Disable spoofing a referer
+// Pref : Send a referer header with the target URI as the source
+// https://bugzilla.mozilla.org/show_bug.cgi?id=822869
+// https://github.com/pyllyukko/user.js/issues/227
+// https://github.com/pyllyukko/user.js/issues/94
+// [NOTE] Spoofing referers breaks functionality on websites relying on authentic referer headers
+// [NOTE] Spoofing referers breaks visualisation of 3rd-party sites on the Lightbeam addon
+// [NOTE] Spoofing referers disables CSRF protection on some login pages not implementing origin-header/cookie+token based CSRF protection
 user_pref("network.http.referer.spoofSource", true); // [DEFAULT: false]
 // -------------------------------------
 // Pref : Set the default Referrer Policy
@@ -2373,7 +2406,7 @@ user_pref("pref.general.disable_button.default_browser", true); // [DESKTOP]
 user_pref("pref.privacy.disable_button.view_passwords", true); // [DESKTOP]
 // -------------------------------------
 // Pref : Disable Reader mode
-user_pref("reader.parse-on-load.enabled", false);
+// user_pref("reader.parse-on-load.enabled", false);
 // -------------------------------------
 // Pref : Disable dark theme on forms
 user_pref("widget.content.gtk-theme-override", "Adwaita"); // [DESKTOP]
@@ -2384,7 +2417,7 @@ user_pref("browser.ctrlTab.recentlyUsedOrder", false); // [DESKTOP]
 // Pref : Display long lines in view-source page
 user_pref("view_source.wrap_long_lines", true);
 // -------------------------------------
-// Pref : Enable dark mode in all "about:" pages
+// Pref : Enable dark mode in all about:* pages
 user_pref("browser.in-content.dark-mode", true);
 //
 //