tidy

In FF128 these were used to migrate to
- clearOnShutdown to clearOnShutdown_v2
- cpd to clearHistory

They are then no longer used.

The migration can be checked with
- privacy.sanitize.clearOnShutdown.hasMigratedToNewPrefs2
- privacy.sanitize.cpd.hasMigratedToNewPrefs2

Note: in FF136 there was another migration, where it changes the `ToNewPrefs2` to false
- privacy.sanitize.clearOnShutdown.hasMigratedToNewPrefs3
- privacy.sanitize.cpd.hasMigratedToNewPrefs3

AFAICT, cpd.hasMigrated* doesn't migrate until you open the clear history dialog.

scratchpad-scripts/arkenfox-cleanup.js

@@ -6,7 +6,7 @@
   There is an archived version at https://github.com/arkenfox/user.js/issues/123
   if you want the full list since jesus
 
-  Last updated: 7-November-2024
+  Last updated: 20-August-2025
 
   Instructions:
   - [optional] close Firefox and backup your profile
@@ -36,6 +36,9 @@
   const aPREFS = [
     /* DEPRECATED */
     /* 129-140 */
+    'browser.shopping.experience2023.enabled', // 140
+    'browser.urlbar.pocket.featureGate', // 140
+    'media.ondevicechange.enabled', // 137
     'webchannel.allowObject.urlWhitelist', // 132
     /* 116-128 */
     'browser.contentanalysis.default_allow', // 127
@@ -73,8 +76,25 @@
     'security.ssl3.rsa_des_ede3_sha', // 93
 
     /* REMOVED */
+    /* 141-153 */
+    'security.OCSP.enabled',
+    'security.OCSP.require',
     /* 129-140 */
+    'dom.securecontext.allowlist_onions',
     'network.http.referer.hideOnionSource',
+    'privacy.clearOnShutdown.cache',
+    'privacy.clearOnShutdown.cookies',
+    'privacy.clearOnShutdown.downloads',
+    'privacy.clearOnShutdown.formdata',
+    'privacy.clearOnShutdown.history',
+    'privacy.clearOnShutdown.offlineApps',
+    'privacy.clearOnShutdown.sessions',
+    'privacy.cpd.cache',
+    'privacy.cpd.cookies',
+    'privacy.cpd.formdata',
+    'privacy.cpd.history',
+    'privacy.cpd.offlineApps',
+    'privacy.cpd.sessions',
     /* 116-128 */
     'browser.fixup.alternate.enabled',
     'browser.taskbar.previews.enable',

user.js

@@ -1,7 +1,7 @@
 /******
 *    name: arkenfox user.js
-*    date: 13 January 2025
-* version: 133
+*    date: 15 September 2025
+* version: 142
 *    urls: https://github.com/arkenfox/user.js [repo]
 *        : https://arkenfox.github.io/gui/ [interactive]
 * license: MIT: https://github.com/arkenfox/user.js/blob/master/LICENSE.txt
@@ -31,7 +31,7 @@
     - DON'T wait for arkenfox to update Firefox, nothing major changes these days
   * Each release
     - run prefsCleaner to reset prefs made inactive, including deprecated (9999)
-  * ESR
+  * ESR (Extended Support Release)
     - It is recommended to not use the updater, or you will get a later version which may cause issues.
       So you should manually append your overrides (and keep a copy), and manually update when you
       change ESR releases (arkenfox is already past that release)
@@ -63,6 +63,7 @@
   6000: DON'T TOUCH
   7000: DON'T BOTHER
   8000: DON'T BOTHER: FINGERPRINTING
+  8500: TELEMETRY
   9000: NON-PROJECT RELATED
   9999: DEPRECATED / RENAMED
 
@@ -82,21 +83,22 @@ user_pref("browser.aboutConfig.showWarning", false);
 user_pref("_user.js.parrot", "0100 syntax error: the parrot's dead!");
 /* 0102: set startup page [SETUP-CHROME]
  * 0=blank, 1=home, 2=last visited page, 3=resume previous session
- * [NOTE] Session Restore is cleared with history (2811), and not used in Private Browsing mode
+ * [NOTE] Session Restore is cleared with history (2811+), and not used in Private Browsing mode
  * [SETTING] General>Startup>Restore previous session ***/
 user_pref("browser.startup.page", 0);
 /* 0103: set HOME+NEWWINDOW page
- * about:home=Firefox Home (default, see 0105), custom URL, about:blank
+ * about:home=Firefox Home (default, see 0105), custom URLs..., Blank Page
  * [SETTING] Home>New Windows and Tabs>Homepage and new windows ***/
-user_pref("browser.startup.homepage", "about:blank");
+user_pref("browser.startup.homepage", "chrome://browser/content/blanktab.html");
 /* 0104: set NEWTAB page
  * true=Firefox Home (default, see 0105), false=blank page
  * [SETTING] Home>New Windows and Tabs>New tabs ***/
 user_pref("browser.newtabpage.enabled", false);
 /* 0105: disable sponsored content on Firefox Home (Activity Stream)
  * [SETTING] Home>Firefox Home Content ***/
-user_pref("browser.newtabpage.activity-stream.showSponsored", false); // [FF58+]
-user_pref("browser.newtabpage.activity-stream.showSponsoredTopSites", false); // [FF83+] Shortcuts>Sponsored shortcuts
+user_pref("browser.newtabpage.activity-stream.showSponsored", false); // [FF58+] Sponsored stories
+user_pref("browser.newtabpage.activity-stream.showSponsoredTopSites", false); // [FF83+] Sponsored shortcuts
+user_pref("browser.newtabpage.activity-stream.showSponsoredCheckboxes", false); // [FF140+] Support Firefox
 /* 0106: clear default topsites
  * [NOTE] This does not block you from adding your own ***/
 user_pref("browser.newtabpage.activity-stream.default.sites", "");
@@ -116,50 +118,19 @@ user_pref("extensions.getAddons.showPane", false); // [HIDDEN PREF]
 /* 0321: disable recommendations in about:addons' Extensions and Themes panes [FF68+] ***/
 user_pref("extensions.htmlaboutaddons.recommendations.enabled", false);
 /* 0322: disable personalized Extension Recommendations in about:addons and AMO [FF65+]
- * [NOTE] This pref has no effect when Health Reports (0331) are disabled
- * [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to make personalized extension recommendations
+ * [NOTE] This pref has no effect when Health Reports (8501) are disabled
+ * [SETTING] Privacy & Security>Firefox Data Collection and Use>Allow personalized extension recommendations
  * [1] https://support.mozilla.org/kb/personalized-extension-recommendations ***/
 user_pref("browser.discovery.enabled", false);
-/* 0323: disable shopping experience [FF116+]
- * [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1840156#c0 ***/
-user_pref("browser.shopping.experience2023.enabled", false); // [DEFAULT: false]
 
-/** TELEMETRY ***/
-/* 0330: disable new data submission [FF41+]
- * If disabled, no policy is shown or upload takes place, ever
- * [1] https://bugzilla.mozilla.org/1195552 ***/
-user_pref("datareporting.policy.dataSubmissionEnabled", false);
-/* 0331: disable Health Reports
- * [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to send technical... data ***/
-user_pref("datareporting.healthreport.uploadEnabled", false);
-/* 0332: disable telemetry
- * The "unified" pref affects the behavior of the "enabled" pref
- * - If "unified" is false then "enabled" controls the telemetry module
- * - If "unified" is true then "enabled" only controls whether to record extended data
- * [NOTE] "toolkit.telemetry.enabled" is now LOCKED to reflect prerelease (true) or release builds (false) [2]
- * [1] https://firefox-source-docs.mozilla.org/toolkit/components/telemetry/telemetry/internals/preferences.html
- * [2] https://medium.com/georg-fritzsche/data-preference-changes-in-firefox-58-2d5df9c428b5 ***/
-user_pref("toolkit.telemetry.unified", false);
-user_pref("toolkit.telemetry.enabled", false); // see [NOTE]
-user_pref("toolkit.telemetry.server", "data:,");
-user_pref("toolkit.telemetry.archive.enabled", false);
-user_pref("toolkit.telemetry.newProfilePing.enabled", false); // [FF55+]
-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+]
-/* 0333: 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]
-user_pref("toolkit.coverage.opt-out", true); // [FF64+] [HIDDEN PREF]
-user_pref("toolkit.coverage.endpoint.base", "");
+/** ACTIVITY STREAM ***/
 /* 0335: disable Firefox Home (Activity Stream) telemetry ***/
 user_pref("browser.newtabpage.activity-stream.feeds.telemetry", false);
 user_pref("browser.newtabpage.activity-stream.telemetry", false);
 
 /** STUDIES ***/
 /* 0340: disable Studies
- * [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to install and run studies ***/
+ * [SETTING] Privacy & Security>Firefox Data Collection and Use>Install and run studies ***/
 user_pref("app.shield.optoutstudies.enabled", false);
 /* 0341: disable Normandy/Shield [FF60+]
  * Shield is a telemetry system that can push and test "recipes"
@@ -173,7 +144,7 @@ user_pref("breakpad.reportURL", "");
 user_pref("browser.tabs.crashReporting.sendReport", false); // [FF44+]
    // user_pref("browser.crashReports.unsubmittedCheck.enabled", false); // [FF51+] [DEFAULT: false]
 /* 0351: enforce no submission of backlogged Crash Reports [FF58+]
- * [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to send backlogged crash reports  ***/
+ * [SETTING] Privacy & Security>Firefox Data Collection and Use>Send backlogged crash reports  ***/
 user_pref("browser.crashReports.unsubmittedCheck.autoSubmit2", false); // [DEFAULT: false]
 
 /** OTHER ***/
@@ -233,7 +204,7 @@ user_pref("network.prefetch-next", false);
 user_pref("network.dns.disablePrefetch", true);
 user_pref("network.dns.disablePrefetchFromHTTPS", true);
 /* 0603: disable predictor / prefetching ***/
-user_pref("network.predictor.enabled", false);
+user_pref("network.predictor.enabled", false); // [DEFAULT: false FF144+]
 user_pref("network.predictor.enable-prefetch", false); // [FF48+] [DEFAULT: false]
 /* 0604: disable link-mouseover opening connection to linked server
  * [1] https://news.slashdot.org/story/15/08/14/2321202/how-to-quash-firefoxs-silent-requests ***/
@@ -261,7 +232,7 @@ user_pref("network.file.disable_unc_paths", true); // [HIDDEN PREF]
  * [1] https://bugzilla.mozilla.org/1433507
  * [2] https://en.wikipedia.org/wiki/GVfs
  * [3] https://en.wikipedia.org/wiki/GIO_(software) ***/
-user_pref("network.gio.supported-protocols", ""); // [HIDDEN PREF] [DEFAULT: "" FF118+]
+user_pref("network.gio.supported-protocols", ""); // [HIDDEN PREF] [DEFAULT: ""]
 /* 0705: disable proxy direct failover for system requests [FF91+]
  * [WARNING] Default true is a security feature against malicious extensions [1]
  * [SETUP-CHROME] If you use a proxy and you trust your extensions
@@ -312,19 +283,20 @@ user_pref("browser.urlbar.suggest.searches", false);
 user_pref("browser.urlbar.trending.featureGate", false);
 /* 0806: disable urlbar suggestions ***/
 user_pref("browser.urlbar.addons.featureGate", false); // [FF115+]
+user_pref("browser.urlbar.amp.featureGate", false); // [FF141+] adMarketplace
 user_pref("browser.urlbar.fakespot.featureGate", false); // [FF130+] [DEFAULT: false]
-user_pref("browser.urlbar.mdn.featureGate", false); // [FF117+] [HIDDEN PREF]
-user_pref("browser.urlbar.pocket.featureGate", false); // [FF116+] [DEFAULT: false]
-user_pref("browser.urlbar.weather.featureGate", false); // [FF108+] [DEFAULT: false]
+user_pref("browser.urlbar.mdn.featureGate", false); // [FF117+]
+user_pref("browser.urlbar.weather.featureGate", false); // [FF108+]
+user_pref("browser.urlbar.wikipedia.featureGate", false); // [FF141+]
 user_pref("browser.urlbar.yelp.featureGate", false); // [FF124+]
 /* 0807: disable urlbar clipboard suggestions [FF118+] ***/
    // user_pref("browser.urlbar.clipboard.featureGate", false);
 /* 0808: disable recent searches [FF120+]
- * [NOTE] Recent searches are cleared with history (2811)
+ * [NOTE] Recent searches are cleared with history (2811+)
  * [1] https://support.mozilla.org/kb/search-suggestions-firefox ***/
    // user_pref("browser.urlbar.recentsearches.featureGate", false);
 /* 0810: disable search and form history
- * [NOTE] We also clear formdata on exit (2811)
+ * [NOTE] We also clear formdata on exit (2811+)
  * [SETUP-WEB] Be aware that autocomplete form data can be read by third parties [1][2]
  * [SETTING] Privacy & Security>History>Custom Settings>Remember search and form history
  * [1] https://blog.mindedsecurity.com/2011/10/autocompleteagain.html
@@ -337,7 +309,7 @@ user_pref("browser.formfill.enable", false);
 /* 0820: disable coloring of visited links
  * [SETUP-HARDEN] Bulk rapid history sniffing was mitigated in 2010 [1][2]. Slower and more expensive
  * redraw timing attacks were largely mitigated in FF77+ [3]. Using RFP (4501) further hampers timing
- * attacks. Don't forget clearing history on exit (2811). However, social engineering [2#limits][4][5]
+ * attacks. Don't forget clearing history on exit (2811+). However, social engineering [2#limits][4][5]
  * and advanced targeted timing attacks could still produce usable results
  * [1] https://developer.mozilla.org/docs/Web/CSS/Privacy_and_the_:visited_selector
  * [2] https://dbaron.org/mozilla/visited-privacy
@@ -357,7 +329,7 @@ user_pref("_user.js.parrot", "0900 syntax error: the parrot's expired!");
 /* 0903: 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
- * [SETTING] Privacy & Security>Logins and Passwords>Autofill logins and passwords
+ * [SETTING] Privacy & Security>Passwords>Autofill logins and passwords
  * [1] https://freedom-to-tinker.com/2017/12/27/no-boundaries-for-user-identities-web-trackers-exploit-browser-login-managers/
  * [2] https://homes.esat.kuleuven.be/~asenol/leaky-forms/ ***/
 user_pref("signon.autofillForms", false);
@@ -380,7 +352,7 @@ user_pref("network.auth.subresource-http-auth-allow", 1);
 /*** [SECTION 1000]: DISK AVOIDANCE ***/
 user_pref("_user.js.parrot", "1000 syntax error: the parrot's gone to meet 'is maker!");
 /* 1001: disable disk cache
- * [NOTE] We also clear cache on exit (2811)
+ * [NOTE] We also clear cache on exit (2811+)
  * [SETUP-CHROME] If you think disk cache helps perf, then feel free to override this ***/
 user_pref("browser.cache.disk.enable", false);
 /* 1002: set media cache in Private Browsing to in-memory and increase its maximum size
@@ -429,28 +401,6 @@ user_pref("security.ssl.require_safe_negotiation", true);
  * [3] https://blog.cloudflare.com/tls-1-3-overview-and-q-and-a/ ***/
 user_pref("security.tls.enable_0rtt_data", false);
 
-/** OCSP (Online Certificate Status Protocol)
-   [1] https://scotthelme.co.uk/revocation-is-broken/
-   [2] https://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox/
-***/
-/* 1211: enforce OCSP fetching to confirm current validity of certificates
- * 0=disabled, 1=enabled (default), 2=enabled for EV certificates only
- * OCSP (non-stapled) leaks information about the sites you visit to the CA (cert authority)
- * It's a trade-off between security (checking) and privacy (leaking info to the CA)
- * [NOTE] This pref only controls OCSP fetching and does not affect OCSP stapling
- * [SETTING] Privacy & Security>Security>Certificates>Query OCSP responder servers...
- * [1] https://en.wikipedia.org/wiki/Ocsp ***/
-user_pref("security.OCSP.enabled", 1); // [DEFAULT: 1]
-/* 1212: set OCSP fetch failures (non-stapled, see 1211) to hard-fail
- * [SETUP-WEB] SEC_ERROR_OCSP_SERVER_ERROR
- * When a CA cannot be reached to validate a cert, Firefox just continues the connection (=soft-fail)
- * Setting this pref to true tells Firefox to instead terminate the connection (=hard-fail)
- * It is pointless to soft-fail when an OCSP fetch fails: you cannot confirm a cert is still valid (it
- * could have been revoked) and/or you could be under attack (e.g. malicious blocking of OCSP servers)
- * [1] https://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox/
- * [2] https://www.imperialviolet.org/2014/04/19/revchecking.html ***/
-user_pref("security.OCSP.require", true);
-
 /** CERTS / HPKP (HTTP Public Key Pinning) ***/
 /* 1223: enable strict PKP (Public Key Pinning)
  * 0=disabled, 1=allow user MiTM (default; such as your antivirus), 2=strict
@@ -462,9 +412,10 @@ user_pref("security.cert_pinning.enforcement_level", 2);
  * 2 = consult CRLite and enforce both "Revoked" and "Not Revoked" results
  * 3 = consult CRLite and enforce "Not Revoked" results, but defer to OCSP for "Revoked" (default)
  * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1429800,1670985,1753071
- * [2] https://blog.mozilla.org/security/tag/crlite/ ***/
-user_pref("security.remote_settings.crlite_filters.enabled", true);
-user_pref("security.pki.crlite_mode", 2);
+ * [2] https://blog.mozilla.org/security/tag/crlite/
+ * [3] https://hacks.mozilla.org/2025/08/crlite-fast-private-and-comprehensive-certificate-revocation-checking-in-firefox/ ***/
+user_pref("security.remote_settings.crlite_filters.enabled", true); // [DEFAULT: true FF137+]
+user_pref("security.pki.crlite_mode", 2); // [DEFAULT: 2 FF142+]
 
 /** MIXED CONTENT ***/
 /* 1241: disable insecure passive content (such as images) on https pages ***/
@@ -588,15 +539,19 @@ user_pref("network.IDN_show_punycode", true);
  * [1] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=pdf.js+firefox ***/
 user_pref("pdfjs.disabled", false); // [DEFAULT: false]
 user_pref("pdfjs.enableScripting", false); // [FF86+]
-/* 2624: disable middle click on new tab button opening URLs or searches using clipboard [FF115+] */
+/* 2624: disable middle click on new tab button opening URLs or searches using clipboard [FF115+] ***/
 user_pref("browser.tabs.searchclipboardfor.middleclick", false); // [DEFAULT: false NON-LINUX]
 /* 2630: disable content analysis by DLP (Data Loss Prevention) agents
  * DLP agents are background processes on managed computers that allow enterprises to monitor locally running
  * applications for data exfiltration events, which they can allow/block based on customer defined DLP policies.
  * 0=Block all requests, 1=Warn on all requests (which lets the user decide), 2=Allow all requests
- * [1] https://github.com/chromium/content_analysis_sdk */
+ * [1] https://github.com/chromium/content_analysis_sdk ***/
 user_pref("browser.contentanalysis.enabled", false); // [FF121+] [DEFAULT: false]
 user_pref("browser.contentanalysis.default_result", 0); // [FF127+] [DEFAULT: 0]
+/* 2635: disable referrer and storage access for resources injected by content scripts [FF139+] ***/
+   // user_pref("privacy.antitracking.isolateContentScriptResources", true);
+/* 2640: disable CSP Level 2 Reporting [FF140+] ***/
+user_pref("security.csp.reporting.enabled", false);
 
 /** DOWNLOADS ***/
 /* 2651: enable user interaction for security by always asking where to download
@@ -647,74 +602,60 @@ user_pref("browser.contentblocking.category", "strict"); // [HIDDEN PREF]
 /*** [SECTION 2800]: SHUTDOWN & SANITIZING ***/
 user_pref("_user.js.parrot", "2800 syntax error: the parrot's bleedin' demised!");
 /* 2810: enable Firefox to clear items on shutdown
- * [NOTE] In FF129+ clearing "siteSettings" on shutdown (2811), or manually via site data (2820) and
+ * [NOTE] In FF129+ clearing "siteSettings" on shutdown (2811+), or manually via site data (2820+) and
  * via history (2830), will no longer remove sanitize on shutdown "cookie and site data" site exceptions (2815)
  * [SETTING] Privacy & Security>History>Custom Settings>Clear history when Firefox closes | Settings ***/
 user_pref("privacy.sanitize.sanitizeOnShutdown", true);
 
-/** SANITIZE ON SHUTDOWN: IGNORES "ALLOW" SITE EXCEPTIONS | v2 migration is FF128+ ***/
-/* 2811: set/enforce what items to clear on shutdown (if 2810 is true) [SETUP-CHROME]
- * [NOTE] If "history" is true, downloads will also be cleared ***/
-user_pref("privacy.clearOnShutdown.cache", true);     // [DEFAULT: true]
-user_pref("privacy.clearOnShutdown_v2.cache", true);  // [FF128+] [DEFAULT: true]
-user_pref("privacy.clearOnShutdown.downloads", true); // [DEFAULT: true]
-user_pref("privacy.clearOnShutdown.formdata", true);  // [DEFAULT: true]
-user_pref("privacy.clearOnShutdown.history", true);   // [DEFAULT: true]
-user_pref("privacy.clearOnShutdown_v2.historyFormDataAndDownloads", true); // [FF128+] [DEFAULT: true]
-   // user_pref("privacy.clearOnShutdown.siteSettings", false); // [DEFAULT: false]
-   // user_pref("privacy.clearOnShutdown_v2.siteSettings", false); // [FF128+] [DEFAULT: false]
-/* 2812: set Session Restore to clear on shutdown (if 2810 is true) [FF34+]
- * [NOTE] Not needed if Session Restore is not used (0102) or it is already cleared with history (2811)
+/** SANITIZE ON SHUTDOWN: IGNORES "ALLOW" SITE EXCEPTIONS ***/
+/* 2811: set/enforce clearOnShutdown items (if 2810 is true) [SETUP-CHROME] [FF128+] ***/
+user_pref("privacy.clearOnShutdown_v2.cache", true); // [DEFAULT: true]
+user_pref("privacy.clearOnShutdown_v2.historyFormDataAndDownloads", true); // [DEFAULT: true]
+   // user_pref("privacy.clearOnShutdown_v2.siteSettings", false); // [DEFAULT: false]
+/* 2812: set/enforce clearOnShutdown items [FF136+] ***/
+user_pref("privacy.clearOnShutdown_v2.browsingHistoryAndDownloads", true); // [DEFAULT: true]
+user_pref("privacy.clearOnShutdown_v2.downloads", true); // [HIDDEN]
+user_pref("privacy.clearOnShutdown_v2.formdata", true);
+/* 2813: set Session Restore to clear on shutdown (if 2810 is true) [FF34+]
+ * [NOTE] Not needed if Session Restore is not used (0102) or it is already cleared with history (2811+)
  * [NOTE] If true, this prevents resuming from crashes (also see 5008) ***/
    // user_pref("privacy.clearOnShutdown.openWindows", true);
 
-/** SANITIZE ON SHUTDOWN: RESPECTS "ALLOW" SITE EXCEPTIONS FF103+ | v2 migration is FF128+ ***/
-/* 2815: set "Cookies" and "Site Data" to clear on shutdown (if 2810 is true) [SETUP-CHROME]
- * [NOTE] Exceptions: A "cookie" permission also controls "offlineApps" (see note below). For cross-domain logins,
- * add exceptions for both sites e.g. https://www.youtube.com (site) + https://accounts.google.com (single sign on)
- * [NOTE] "offlineApps": Offline Website Data: localStorage, service worker cache, QuotaManager (IndexedDB, asm-cache)
- * [NOTE] "sessions": Active Logins (has no site exceptions): refers to HTTP Basic Authentication [1], not logins via cookies
+/** SANITIZE ON SHUTDOWN: RESPECTS "ALLOW" SITE EXCEPTIONS ***/
+/* 2815: set "Cookies" and "Site Data" to clear on shutdown (if 2810 is true) [SETUP-CHROME] [FF128+]
+ * [NOTE] Exceptions: For cross-domain logins, add exceptions for both sites
+ * e.g. https://www.youtube.com (site) + https://accounts.google.com (single sign on)
  * [WARNING] Be selective with what sites you "Allow", as they also disable partitioning (1767271)
  * [SETTING] to add site exceptions: Ctrl+I>Permissions>Cookies>Allow (when on the website in question)
- * [SETTING] to manage site exceptions: Options>Privacy & Security>Permissions>Settings
- * [1] https://en.wikipedia.org/wiki/Basic_access_authentication ***/
-user_pref("privacy.clearOnShutdown.cookies", true); // Cookies
-user_pref("privacy.clearOnShutdown.offlineApps", true); // Site Data
-user_pref("privacy.clearOnShutdown.sessions", true);  // Active Logins [DEFAULT: true]
-user_pref("privacy.clearOnShutdown_v2.cookiesAndStorage", true); // Cookies, Site Data, Active Logins [FF128+]
+ * [SETTING] to manage site exceptions: Options>Privacy & Security>Permissions>Settings ***/
+user_pref("privacy.clearOnShutdown_v2.cookiesAndStorage", true);
 
 /** SANITIZE SITE DATA: IGNORES "ALLOW" SITE EXCEPTIONS ***/
 /* 2820: set manual "Clear Data" items [SETUP-CHROME] [FF128+]
  * Firefox remembers your last choices. This will reset them when you start Firefox
  * [SETTING] Privacy & Security>Browser Privacy>Cookies and Site Data>Clear Data ***/
-user_pref("privacy.clearSiteData.cache", true);
+user_pref("privacy.clearSiteData.cache", true); // [DEFAULT: true]
 user_pref("privacy.clearSiteData.cookiesAndStorage", false); // keep false until it respects "allow" site exceptions
 user_pref("privacy.clearSiteData.historyFormDataAndDownloads", true);
    // user_pref("privacy.clearSiteData.siteSettings", false);
+/* 2821: set manual "Clear Data" items [FF136+] ***/
+user_pref("privacy.clearSiteData.browsingHistoryAndDownloads", true);
+user_pref("privacy.clearSiteData.formdata", true);
 
-/** SANITIZE HISTORY: IGNORES "ALLOW" SITE EXCEPTIONS | clearHistory migration is FF128+ ***/
-/* 2830: set manual "Clear History" items, also via Ctrl-Shift-Del [SETUP-CHROME]
+/** SANITIZE HISTORY: IGNORES "ALLOW" SITE EXCEPTIONS ***/
+/* 2830: set manual "Clear History" items, also via Ctrl-Shift-Del [SETUP-CHROME] [FF128+]
  * Firefox remembers your last choices. This will reset them when you start Firefox
- * [NOTE] Regardless of what you set "downloads" to, as soon as the dialog
- * for "Clear Recent History" is opened, it is synced to the same as "history"
  * [SETTING] Privacy & Security>History>Custom Settings>Clear History ***/
-user_pref("privacy.cpd.cache", true);    // [DEFAULT: true]
-user_pref("privacy.clearHistory.cache", true);
-user_pref("privacy.cpd.formdata", true); // [DEFAULT: true]
-user_pref("privacy.cpd.history", true);  // [DEFAULT: true]
-   // user_pref("privacy.cpd.downloads", true); // not used, see note above
-user_pref("privacy.clearHistory.historyFormDataAndDownloads", true);
-user_pref("privacy.cpd.cookies", false);
-user_pref("privacy.cpd.sessions", true); // [DEFAULT: true]
-user_pref("privacy.cpd.offlineApps", false); // [DEFAULT: false]
+user_pref("privacy.clearHistory.cache", true); // [DEFAULT: true]
 user_pref("privacy.clearHistory.cookiesAndStorage", false);
-   // user_pref("privacy.cpd.openWindows", false); // Session Restore
-   // user_pref("privacy.cpd.passwords", false);
-   // user_pref("privacy.cpd.siteSettings", false);
-   // user_pref("privacy.clearHistory.siteSettings", false);
+user_pref("privacy.clearHistory.historyFormDataAndDownloads", true); // [DEFAULT: true]
+   // user_pref("privacy.clearHistory.siteSettings", false); // [DEFAULT: false]
+/* 2831: set manual "Clear History" items [FF136+] ***/
+user_pref("privacy.clearHistory.browsingHistoryAndDownloads", true); // [DEFAULT: true]
+user_pref("privacy.clearHistory.formdata", true);
 
 /** SANITIZE MANUAL: TIMERANGE ***/
-/* 2840: set "Time range to clear" for "Clear Data" (2820) and "Clear History" (2830)
+/* 2840: set "Time range to clear" for "Clear Data" (2820+) and "Clear History" (2830+)
  * Firefox remembers your last choice. This will reset the value when you start Firefox
  * 0=everything, 1=last hour, 2=last two hours, 3=last four hours, 4=today
  * [NOTE] Values 5 (last 5 minutes) and 6 (last 24 hours) are not listed in the dropdown,
@@ -733,14 +674,20 @@ user_pref("privacy.sanitize.timeSpan", 0);
    [NOTE] RFPTargets + granular overrides are somewhat experimental and may produce unexpected results
    - e.g. FrameRate can only be controlled per process, not per origin
 
-   1826408 - restrict fonts to system (kBaseFonts + kLangPackFonts) (Windows, Mac, some Linux)
+   1826408 - restrict to system fonts (kBaseFonts + kLangPackFonts) (Windows, Mac, some Linux) (FF119+)
+      1928705: android (FF134+)
       https://searchfox.org/mozilla-central/search?path=StandardFonts*.inc
    1858181 - subtly randomize canvas per eTLD+1, per session and per window-mode (FF120+)
+   1887682 - use fdlibm's sin, cos and tan in jsmath (FF134+)
+   1978414 - various (FF143+)
+      1954194: available screen resolution: return a fixed offset height from screen per platform when not full screen
+      1978414 & 1984333: hardwareConcurrency: return 2 (FF143) | less than 8 return 4 else return 8 (FF144+)
+      1977836: maxTouchPoints: return multi-touch as 5
 ***/
 user_pref("_user.js.parrot", "4000 syntax error: the parrot's bereft of life!");
 /* 4001: enable FPP in PB mode [FF114+]
  * [NOTE] In FF119+, FPP for all modes (7016) is enabled with ETP Strict (2701) ***/
-   // user_pref("privacy.fingerprintingProtection.pbmode", true); // [DEFAULT: true FF118+]
+   // user_pref("privacy.fingerprintingProtection.pbmode", true); // [DEFAULT: true]
 /* 4002: set global FPP overrides [FF114+]
  * uses "RFPTargets" [1] which despite the name these are not used by RFP
  * e.g. "+AllTargets,-CSSPrefersColorScheme,-JSDateTimeUTC" = all targets but allow prefers-color-scheme and do not change timezone
@@ -760,19 +707,17 @@ user_pref("_user.js.parrot", "4000 syntax error: the parrot's bereft of life!");
 
    FF128+ Arkenfox by default uses FPP (automatically enabled with ETP Strict). For most people
    this is all you need. To use RFP instead, add RFP (4501) to your overrides, and optionally
-   add letterboxing (4504), spoof_english (4506), and webgl (4520).
+   add letterboxing (4504), spoof_english (4506), and WebGL (4520).
 
    RFP is an all-or-nothing buy in: you cannot pick and choose what parts you want
-   [TEST] https://arkenfox.github.io/TZP/tzp.html
 
    [WARNING] DO NOT USE extensions to alter RFP protected metrics
 
     418986 - limit window.screen & CSS media queries (FF41)
-   1360039 - spoof navigator.hardwareConcurrency as 2 (FF55)
  FF56
    1333651 - spoof User Agent & Navigator API
-      version: android version spoofed as ESR (FF119 or lower)
-      OS: JS spoofed as Windows 10, OS 10.15, Android 10, or Linux | HTTP Headers spoofed as Windows or Android
+      JS: spoofed as Windows 10, OS X 10.15, Android 10, or Linux
+      HTTP Header: spoofed as Windows 10 or Android 10 until FF136 then matches JS spoof
    1369319 - disable device sensor API
    1369357 - disable site specific zoom
    1337161 - hide gamepads from content
@@ -791,10 +736,12 @@ user_pref("_user.js.parrot", "4000 syntax error: the parrot's bereft of life!");
    1222285 & 1433592 - spoof keyboard events and suppress keyboard modifier events (FF59)
       Spoofing mimics the content language of the document. Currently it only supports en-US.
       Modifier events suppressed are SHIFT and both ALT keys. Chrome is not affected.
-   1337157 - disable WebGL debug renderer info (FF60)
    1459089 - disable OS locale in HTTP Accept-Language headers (ANDROID) (FF62)
    1479239 - return "no-preference" with prefers-reduced-motion (FF63)
-   1363508 & 1826051 - spoof/suppress Pointer Events (FF64, FF132)
+   1363508 & 1826051 & 1957658 - spoof/suppress Pointer Events, spoof maxTouchPoints (FF64, FF132, FF143, ESR140.2)
+       FF64: maxTouchPoints: 0 = desktop
+      FF132: maxTouchPoints: 0 = mac | 10 = windows, linux, mobile
+      FF143/140.2: maxTouchPoints: 0 = mac, linux | 10 = windows | 5 = mobile
    1492766 - spoof pointerEvent.pointerid (FF65)
    1485266 - disable exposure of system colors to CSS or canvas (FF67)
    1494034 - return "light" with prefers-color-scheme (FF67)
@@ -806,7 +753,6 @@ user_pref("_user.js.parrot", "4000 syntax error: the parrot's bereft of life!");
    1653987 - limit font visibility to bundled and "Base Fonts" (Windows, Mac, some Linux) (FF80)
    1461454 - spoof smooth=true and powerEfficient=false for supported media in MediaCapabilities (FF82)
     531915 - use fdlibm's sin, cos and tan in jsmath (FF93, ESR91.1)
-   1756280 - enforce navigator.pdfViewerEnabled as true and plugins/mimeTypes as hard-coded values (FF100-115)
    1692609 - reduce JS timing precision to 16.67ms (previously FF55+ was 100ms) (FF102)
    1422237 - return "srgb" with color-gamut (FF110)
    1794628 - return "none" with inverted-colors (FF114)
@@ -814,11 +760,20 @@ user_pref("_user.js.parrot", "4000 syntax error: the parrot's bereft of life!");
    1835987 - spoof timezone as Atlantic/Reykjavik (previously FF55+ was UTC) (FF128)
    1834307 - always use smooth scrolling (FF132)
    1918202 - spoof screen orientation based on spoofed screen size and platform (FF132)
-      previously it always returned landscape-primary and an angle of 0 (FF50+)
+      previously FF50+ it always returned landscape-primary and an angle of 0
    1390465 - load all subtitles in WebVTT (Video Text Tracks) (FF133)
    1873382 - make spoofed devicePixelRatio and CSS media queries match (FF133)
       previously FF41+ devicePixelRatio was hardcoded as 1 and FF127+ as 2
       previously FF41+ CSS media queries were spoofed as zoom level at a devicePixelRatio of 1
+   1955425 - return 128 for WebGPU subgroupMaxSize (FF138)
+   1966860 - spoof WebGL debug renderer info (FF140)
+      previously FF60+ it was disabled
+   1781277 - return 10GiB for storage estimate until persistent-storage granted (FF142, ESR140.1)
+   1972600 - spoof network connection for HTMLMediaElement preload (FF142, ESR140.1)
+   1975851 - return true for navigator.onLine (FF142, ESR140.1)
+   1973265 - disable WebCodecs API (FF142?)
+   1984333 - spoof navigator.hardwareConcurrency as 4 except mac return 8 (FF144+)
+       previously FF55+ it returned 2
 ***/
 user_pref("_user.js.parrot", "4500 syntax error: the parrot's popped 'is clogs");
 /* 4501: enable RFP
@@ -840,16 +795,17 @@ user_pref("privacy.resistFingerprinting.block_mozAddonManager", true);
  * Dynamically resizes the inner window by applying margins in stepped ranges [2]
  * If you use the dimension pref, then it will only apply those resolutions.
  * The format is "width1xheight1, width2xheight2, ..." (e.g. "800x600, 1000x1000")
- * [SETUP-WEB] This is independent of RFP (4501). If you're not using RFP, or you are but
- * dislike the margins, then flip this pref, keeping in mind that it is effectively fingerprintable
+ * [SETUP-WEB] This is independent of RFP (4501). If you're using RFP, but dislike the
+ * margins, then don't enable this pref, keeping in mind that it is effectively fingerprintable
  * [WARNING] DO NOT USE: the dimension pref is only meant for testing
  * [1] https://bugzilla.mozilla.org/1407366
  * [2] https://hg.mozilla.org/mozilla-central/rev/7211cb4f58ff#l5.13 ***/
    // user_pref("privacy.resistFingerprinting.letterboxing", true); // [HIDDEN PREF]
    // user_pref("privacy.resistFingerprinting.letterboxing.dimensions", ""); // [HIDDEN PREF]
 /* 4505: disable RFP by domain [FF91+]
- * [NOTE] Working examples: "arkenfox.github.io", "*github.io"
- * Non-working examples: "https://arkenfox.github.io", "github.io", "*arkenfox.github.io" ***/
+ * [NOTE]: The pref takes comma separated values: e.g. "*domain1.tld, *domain2.tld"
+ * Working domain examples: "arkenfox.github.io", "*github.io"
+ * Non-working domain examples: "https://arkenfox.github.io", "github.io", "*arkenfox.github.io" ***/
    // user_pref("privacy.resistFingerprinting.exemptedDomains", "*.example.invalid");
 /* 4506: disable RFP spoof english prompt [FF59+]
  * 0=prompt, 1=disabled, 2=enabled
@@ -857,6 +813,8 @@ user_pref("privacy.resistFingerprinting.block_mozAddonManager", true);
  * [SETUP-WEB] when enabled, sets 'en-US, en' for displaying pages and 'en-US' as locale.
  * [SETTING] General>Language>Choose your preferred language for displaying pages>Choose>Request English... ***/
 user_pref("privacy.spoof_english", 1);
+/* 4507: skip browser.startup.blankWindow if RFP is used [FF136+] ***/
+   // user_pref("privacy.resistFingerprinting.skipEarlyBlankFirstPaint", true); // [DEFAULT: true]
 /* 4510: disable using system colors
  * [SETTING] General>Language and Appearance>Fonts and Colors>Colors>Use system colors ***/
 user_pref("browser.display.use_system_colors", false); // [DEFAULT: false NON-WINDOWS]
@@ -867,7 +825,6 @@ user_pref("widget.non-native-theme.use-theme-accent", false); // [DEFAULT: false
  * Stops malicious window sizes and some screen resolution leaks.
  * You can still right-click a link and open in a new window
  * [SETTING] General>Tabs>Open links in tabs instead of new windows
- * [TEST] https://arkenfox.github.io/TZP/tzp.html#screen
  * [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/9881 ***/
 user_pref("browser.link.open_newwindow", 3); // [DEFAULT: 3]
 /* 4513: set all open window methods to abide by "browser.link.open_newwindow" (4512)
@@ -935,7 +892,7 @@ user_pref("_user.js.parrot", "5000 syntax error: the parrot's taken 'is last bow
  * [1] https://support.mozilla.org/kb/address-bar-autocomplete-firefox#w_url-autocomplete ***/
    // user_pref("browser.urlbar.autoFill", false);
 /* 5013: disable browsing and download history
- * [NOTE] We also clear history and downloads on exit (2811)
+ * [NOTE] We also clear history and downloads on exit (2811+)
  * [SETTING] Privacy & Security>History>Custom Settings>Remember browsing and download history ***/
    // user_pref("places.history.enabled", false);
 /* 5014: disable Windows jumplist [WINDOWS] ***/
@@ -1006,7 +963,7 @@ user_pref("_user.js.parrot", "5500 syntax error: this is an ex-parrot!");
    // user_pref("javascript.options.wasm", false);
 /* 5507: disable rendering of SVG OpenType fonts ***/
    // user_pref("gfx.font_rendering.opentype_svg.enabled", false);
-/* 5508: disable all DRM content (EME: Encryption Media Extension)
+/* 5508: disable all DRM (Digital Rights Management) content (EME: Encryption Media Extension)
  * Optionally hide the UI setting which also disables the DRM prompt
  * [SETTING] General>DRM Content>Play DRM-controlled content
  * [TEST] https://bitmovin.com/demos/drm
@@ -1058,18 +1015,25 @@ user_pref("security.tls.version.enable-deprecated", false); // [DEFAULT: false]
  * [WHY] To prevent wasting Mozilla's time with a custom setup ***/
 user_pref("extensions.webcompat-reporter.enabled", false); // [DEFAULT: false]
 /* 6012: enforce Quarantined Domains [FF115+]
- * [WHY] https://support.mozilla.org/kb/quarantined-domains */
+ * [WHY] https://support.mozilla.org/kb/quarantined-domains ***/
 user_pref("extensions.quarantinedDomains.enabled", true); // [DEFAULT: true]
-/* 6050: prefsCleaner: previously active items removed from arkenfox 115-127 ***/
-   // user_pref("accessibility.force_disabled", "");
-   // user_pref("browser.urlbar.dnsResolveSingleWordsAfterSearch", "");
-   // user_pref("geo.provider.network.url", "");
-   // user_pref("geo.provider.network.logging.enabled", "");
-   // user_pref("geo.provider.use_gpsd", "");
-   // user_pref("network.protocol-handler.external.ms-windows-store", "");
-   // user_pref("privacy.partition.always_partition_third_party_non_cookie_storage", "");
-   // user_pref("privacy.partition.always_partition_third_party_non_cookie_storage.exempt_sessionstorage", "");
-   // user_pref("privacy.partition.serviceWorkers", "");
+/* 6050: prefsCleaner: reset previously active items removed from arkenfox FF128+ ***/
+   // user_pref("privacy.clearOnShutdown.cache", "");
+   // user_pref("privacy.clearOnShutdown.cookies", "");
+   // user_pref("privacy.clearOnShutdown.downloads", "");
+   // user_pref("privacy.clearOnShutdown.formdata", "");
+   // user_pref("privacy.clearOnShutdown.history", "");
+   // user_pref("privacy.clearOnShutdown.offlineApps", "");
+   // user_pref("privacy.clearOnShutdown.sessions", "");
+   // user_pref("privacy.cpd.cache", "");
+   // user_pref("privacy.cpd.cookies", "");
+   // user_pref("privacy.cpd.formdata", "");
+   // user_pref("privacy.cpd.history", "");
+   // user_pref("privacy.cpd.offlineApps", "");
+   // user_pref("privacy.cpd.sessions", "");
+/* 6051: prefsCleaner: reset previously active items removed from arkenfox FF140+ ***/
+   // user_pref("security.OCSP.enabled", "");
+   // user_pref("security.OCSP.require", "");
 
 /*** [SECTION 7000]: DON'T BOTHER ***/
 user_pref("_user.js.parrot", "7000 syntax error: the parrot's pushing up daisies!");
@@ -1151,14 +1115,14 @@ user_pref("_user.js.parrot", "7000 syntax error: the parrot's pushing up daisies
    // user_pref("network.http.referer.disallowCrossSiteRelaxingDefault.top_navigation", true); // [FF100+]
    // user_pref("privacy.bounceTrackingProtection.mode", 1); // [FF131+] [ETP FF133+]
    // user_pref("privacy.fingerprintingProtection", true); // [FF114+] [ETP FF119+]
-   // user_pref("privacy.partition.network_state.ocsp_cache", true); // [DEFAULT: true FF123+]
+   // user_pref("privacy.partition.network_state.ocsp_cache", true); // [DEFAULT: true]
    // user_pref("privacy.query_stripping.enabled", true); // [FF101+]
    // user_pref("privacy.trackingprotection.enabled", true);
    // user_pref("privacy.trackingprotection.socialtracking.enabled", true);
    // user_pref("privacy.trackingprotection.cryptomining.enabled", true); // [DEFAULT: true]
    // user_pref("privacy.trackingprotection.fingerprinting.enabled", true); // [DEFAULT: true]
 /* 7017: disable service workers
- * [WHY] Already isolated with TCP (2701) behind a pref (2710) ***/
+ * [WHY] Already isolated with TCP (2701) behind a pref ***/
    // user_pref("dom.serviceWorkers.enabled", false);
 /* 7018: disable Web Notifications [FF22+]
  * [WHY] Web Notifications are behind a prompt (7002)
@@ -1204,12 +1168,63 @@ user_pref("_user.js.parrot", "8000 syntax error: the parrot's crossed the Jordan
    // user_pref("general.platform.override", "");
    // user_pref("general.useragent.override", "");
    // user_pref("media.navigator.enabled", "");
-   // user_pref("media.ondevicechange.enabled", "");
    // user_pref("media.video_stats.enabled", "");
    // user_pref("media.webspeech.synth.enabled", "");
    // user_pref("ui.use_standins_for_native_colors", "");
    // user_pref("webgl.enable-debug-renderer-info", "");
 
+/*** [SECTION 8500]: TELEMETRY
+   Arkenfox does not consider Firefox telemetry to be a privacy or security concern - comments below.
+   But since most arkenfox users prefer it disabled, we'll do that rather than cause overrides.
+
+   Opt-out
+   - Telemetry is essential: a browser engine is a _very_ large complex beast costing billions to maintain
+   - Opt-in telemetry _does not_ work and results in data that is unrepresentative and may be misleading
+   Choice
+   - Every new profile on first use provides data collection/use policy and the abillty to opt-out
+   - It can be disabled at any time (Settings>Privacy & Security>Data Collection and Use)
+   Data
+   - no PII (Personally Identifiable Information)
+   - can be viewed in about:telemetry
+   - uses Prio [1][2][3], Glean [4], Oblivious HTTP [5][6]
+
+   [1] https://crypto.stanford.edu/prio/
+   [2] https://hacks.mozilla.org/2018/10/testing-privacy-preserving-telemetry-with-prio/
+   [3] https://blog.mozilla.org/security/2019/06/06/next-steps-in-privacy-preserving-telemetry-with-prio/
+   [4] https://firefox-source-docs.mozilla.org/toolkit/components/glean/index.html
+   [5] https://firefox-source-docs.mozilla.org/toolkit/components/glean/user/ohttp.html
+   [6] https://blog.mozilla.org/en/tag/oblivious-http/
+***/
+user_pref("_user.js.parrot", "8500 syntax error: the parrot's off the twig!");
+/* 8500: disable new data submission [FF41+]
+ * If disabled, no policy is shown or upload takes place, ever
+ * [1] https://bugzilla.mozilla.org/1195552 ***/
+user_pref("datareporting.policy.dataSubmissionEnabled", false);
+/* 8501: disable Health Reports
+ * [SETTING] Privacy & Security>Firefox Data Collection and Use>Send technical... data ***/
+user_pref("datareporting.healthreport.uploadEnabled", false);
+/* 0802: disable telemetry
+ * The "unified" pref affects the behavior of the "enabled" pref
+ * - If "unified" is false then "enabled" controls the telemetry module
+ * - If "unified" is true then "enabled" only controls whether to record extended data
+ * [NOTE] "toolkit.telemetry.enabled" is now LOCKED to reflect prerelease (true) or release builds (false) [2]
+ * [1] https://firefox-source-docs.mozilla.org/toolkit/components/telemetry/telemetry/internals/preferences.html
+ * [2] https://medium.com/georg-fritzsche/data-preference-changes-in-firefox-58-2d5df9c428b5 ***/
+user_pref("toolkit.telemetry.unified", false);
+user_pref("toolkit.telemetry.enabled", false); // see [NOTE]
+user_pref("toolkit.telemetry.server", "data:,");
+user_pref("toolkit.telemetry.archive.enabled", false);
+user_pref("toolkit.telemetry.newProfilePing.enabled", false); // [FF55+]
+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+]
+/* 8503: 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]
+user_pref("toolkit.coverage.opt-out", true); // [FF64+] [HIDDEN PREF]
+user_pref("toolkit.coverage.endpoint.base", "");
+
 /*** [SECTION 9000]: NON-PROJECT RELATED ***/
 user_pref("_user.js.parrot", "9000 syntax error: the parrot's cashed in 'is chips!");
 /* 9001: disable welcome notices ***/
@@ -1223,80 +1238,20 @@ user_pref("browser.urlbar.showSearchTerms.enabled", false);
 
 /*** [SECTION 9999]: DEPRECATED / RENAMED ***/
 user_pref("_user.js.parrot", "9999 syntax error: the parrot's shuffled off 'is mortal coil!");
-/* ESR115.x still uses all the following prefs
-// [NOTE] replace the * with a slash in the line above to re-enable active ones
-// FF116
-// 4506: set RFP's font visibility level (1402) [FF94+]
-   // [-] https://bugzilla.mozilla.org/1838415
-   // user_pref("layout.css.font-visibility.resistFingerprinting", 1); // [DEFAULT: 1]
-// FF117
-// 1221: disable Windows Microsoft Family Safety cert [FF50+] [WINDOWS]
-   // 0=disable detecting Family Safety mode and importing the root
-   // 1=only attempt to detect Family Safety mode (don't import the root)
-   // 2=detect Family Safety mode and import the root
-   // [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/21686
-   // [-] https://bugzilla.mozilla.org/1844908
-user_pref("security.family_safety.mode", 0);
-// 7018: disable service worker Web Notifications [FF44+]
-   // [WHY] Web Notifications are behind a prompt (7002)
-   // [1] https://blog.mozilla.org/en/products/firefox/block-notification-requests/
-   // [-] https://bugzilla.mozilla.org/1842457
-   // user_pref("dom.webnotifications.serviceworker.enabled", false);
-// FF118
-// 1402: limit font visibility (Windows, Mac, some Linux) [FF94+]
-   // Uses hardcoded lists with two parts: kBaseFonts + kLangPackFonts [1], bundled fonts are auto-allowed
-   // In normal windows: uses the first applicable: RFP over TP over Standard
-   // In Private Browsing windows: uses the most restrictive between normal and private
-   // 1=only base system fonts, 2=also fonts from optional language packs, 3=also user-installed fonts
-   // [1] https://searchfox.org/mozilla-central/search?path=StandardFonts*.inc
-   // [-] https://bugzilla.mozilla.org/1847599
-   // user_pref("layout.css.font-visibility.private", 1);
-   // user_pref("layout.css.font-visibility.standard", 1);
-   // user_pref("layout.css.font-visibility.trackingprotection", 1);
-// 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
-   // [-] https://bugzilla.mozilla.org/1697151
-   // user_pref("permissions.delegation.enabled", false);
-// FF119
-// 0211: use en-US locale regardless of the system or region locale
-   // [SETUP-WEB] May break some input methods e.g xim/ibus for CJK languages [1]
-   // [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=867501,1629630
-   // [-] https://bugzilla.mozilla.org/1846224
-   // user_pref("javascript.use_us_english_locale", true); // [HIDDEN PREF]
-// 0711: disable skipping DoH when parental controls are enabled [FF70+]
-   // [-] https://bugzilla.mozilla.org/1586941
-user_pref("network.dns.skipTRR-when-parental-control-enabled", false);
-// FF123
-// 0334: disable PingCentre telemetry (used in several System Add-ons) [FF57+]
-   // Defense-in-depth: currently covered by 0331
-   // [-] https://bugzilla.mozilla.org/1868988
-user_pref("browser.ping-centre.telemetry", false);
-// FF126
-// 9003: disable What's New toolbar icon [FF69+]
-   // [-] https://bugzilla.mozilla.org/1724300
-user_pref("browser.messaging-system.whatsNewPanel.enabled", false);
-// FF127
-  // 2630: disable content analysis by DLP (Data Loss Prevention) agents - replaced by default_result
-  // [-] https://bugzilla.mozilla.org/1880314
-user_pref("browser.contentanalysis.default_allow", false);
-// 4511: enforce non-native widget theme
-   // Security: removes/reduces system API calls, e.g. win32k API [1]
-   // Fingerprinting: provides a uniform look and feel across platforms [2]
-   // [1] https://bugzilla.mozilla.org/1381938
-   // [2] https://bugzilla.mozilla.org/1411425
-   // [-] https://bugzilla.mozilla.org/1848899
-user_pref("widget.non-native-theme.enabled", true); // [DEFAULT: true]
-// ***/
-
 /* ESR128.x still uses all the following prefs
 // [NOTE] replace the * with a slash in the line above to re-enable active ones
 // FF132
-/* 2617: remove webchannel whitelist
+// 2617: remove webchannel whitelist
    // [-] https://bugzilla.mozilla.org/1275612
    // user_pref("webchannel.allowObject.urlWhitelist", "");
+// FF140
+// 0323: disable shopping experience [FF116+]
+   // [-] https://bugzilla.mozilla.org/1964845
+   // [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1840156#c0
+user_pref("browser.shopping.experience2023.enabled", false); // [DEFAULT: false]
+// 0806: disable urlbar suggestions
+   // [-] https://bugzilla.mozilla.org/1959497
+user_pref("browser.urlbar.pocket.featureGate", false); // [FF116+] [DEFAULT: false]
 // ***/
 
 /* END: internal custom pref to test for syntax errors ***/