v151

@tomrittervg added a link to your blog about telemetry

README.md

@@ -1,3 +1,5 @@
+This repo and the interative webpage linked below are the **_only official sources_** - do not trust any other sites claiming to be Arkenfox
+
 ### 🟪  user.js
 A `user.js` is a configuration file that can control Firefox settings - for a more technical breakdown and explanation, you can read more in the [wiki](https://github.com/arkenfox/user.js/wiki/2.1-User.js)
 

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   There is an archived version at https://github.com/arkenfox/user.js/issues/123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: 14-August-2025
+  Last updated: 19-December-2025
 
   Instructions:
   - [optional] close Firefox and backup your profile
@@ -35,6 +35,9 @@
 
   const aPREFS = [
     /* DEPRECATED */
+    /* 141-153 */
+    'network.predictor.enabled', // 148
+    'network.predictor.enable-prefetch', // 148
     /* 129-140 */
     'browser.shopping.experience2023.enabled', // 140
     'browser.urlbar.pocket.featureGate', // 140
@@ -76,6 +79,12 @@
     'security.ssl3.rsa_des_ede3_sha', // 93
 
     /* REMOVED */
+    /* 141-153 */
+    'browser.display.use_system_colors',
+    'browser.urlbar.fakespot.featureGate',
+    'keyword.enabled',
+    'security.OCSP.enabled',
+    'security.OCSP.require',
     /* 129-140 */
     'dom.securecontext.allowlist_onions',
     'network.http.referer.hideOnionSource',

user.js

@@ -1,7 +1,7 @@
 /******
 *    name: arkenfox user.js
-*    date: 14 August 2025
+*    date: 30 June 2026
-* version: 140
+* version: 151
 *    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
@@ -23,6 +23,7 @@
        [SETUP-SECURITY] it's one item, read it
             [SETUP-WEB] can cause some websites to break
          [SETUP-CHROME] changes how Firefox itself behaves (i.e. not directly website related)
+         [SETUP-HARDEN] prefs you may like to add to overrides
   6. Override Recipes: https://github.com/arkenfox/user.js/issues/1080
 
 * RELEASES: https://github.com/arkenfox/user.js/releases
@@ -46,7 +47,7 @@
   0600: BLOCK IMPLICIT OUTBOUND
   0700: DNS / DoH / PROXY / SOCKS
   0800: LOCATION BAR / SEARCH BAR / SUGGESTIONS / HISTORY / FORMS
-  0900: PASSWORDS
+  0900: PASSWORDS / PASSKEYS
   1000: DISK AVOIDANCE
   1200: HTTPS (SSL/TLS / OCSP / CERTS / HPKP)
   1600: REFERERS
@@ -83,7 +84,7 @@ 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 if history is also cleared (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
@@ -160,12 +161,16 @@ user_pref("network.connectivity-service.enabled", false);
    SB has taken many steps to preserve privacy. If required, a full url is never sent
    to Google, only a part-hash of the prefix, hidden with noise of other real part-hashes.
    Firefox takes measures such as stripping out identifying parameters and since SBv4 (FF57+)
-   doesn't even use cookies. (#Turn on browser.safebrowsing.debug to monitor this activity)
+   doesn't even use cookies. (#Turn on browser.safebrowsing.debug to monitor this activity).
+
+   FF147+ uses SBv5 which incorporates Oblivous HTTP [5] and SBv5's local list mode [6]
 
    [1] https://feeding.cloud.geek.nz/posts/how-safe-browsing-works-in-firefox/
    [2] https://wiki.mozilla.org/Security/Safe_Browsing
    [3] https://support.mozilla.org/kb/how-does-phishing-and-malware-protection-work
    [4] https://educatedguesswork.org/posts/safe-browsing-privacy/
+   [5] https://developers.google.com/safe-browsing/reference
+   [6] https://developers.google.com/safe-browsing/reference/Local.List.Mode
 ***/
 user_pref("_user.js.parrot", "0400 syntax error: the parrot's passed on!");
 /* 0401: disable SB (Safe Browsing)
@@ -203,9 +208,6 @@ user_pref("network.prefetch-next", false);
  * [1] https://developer.mozilla.org/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control ***/
 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.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 ***/
 user_pref("network.http.speculative-parallel-limit", 0);
@@ -284,15 +286,17 @@ 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.importantDates.featureGate", false); // [FF143+]
+user_pref("browser.urlbar.market.featureGate", false); // [FF143+] stock market
 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+]
+user_pref("browser.urlbar.yelpRealtime.featureGate", false); // [FF144+]
 /* 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 if history is cleared (2811+)
  * [1] https://support.mozilla.org/kb/search-suggestions-firefox ***/
    // user_pref("browser.urlbar.recentsearches.featureGate", false);
 /* 0810: disable search and form history
@@ -309,7 +313,7 @@ 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. History can also be cleared 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
@@ -322,7 +326,7 @@ user_pref("browser.formfill.enable", false);
 user_pref("browser.search.separatePrivateDefault", true); // [FF70+]
 user_pref("browser.search.separatePrivateDefault.ui.enabled", true); // [FF71+]
 
-/*** [SECTION 0900]: PASSWORDS
+/*** [SECTION 0900]: PASSWORDS / PASSKEYS
    [1] https://support.mozilla.org/kb/use-primary-password-protect-stored-logins-and-pas
 ***/
 user_pref("_user.js.parrot", "0900 syntax error: the parrot's expired!");
@@ -348,6 +352,9 @@ user_pref("network.auth.subresource-http-auth-allow", 1);
 /* 0907: enforce no automatic authentication on Microsoft sites [FF131+] [MAC]
  * On macOS, SSO only works on corporate devices ***/
    // user_pref("network.http.microsoft-entra-sso.enabled", false); // [DEFAULT: false]
+/* 0910: enforce no direct attestation in passkeys [FF144+]
+   // [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1981587 ***/
+user_pref("security.webauthn.always_allow_direct_attestation", false); // [DEFAULT: false]
 
 /*** [SECTION 1000]: DISK AVOIDANCE ***/
 user_pref("_user.js.parrot", "1000 syntax error: the parrot's gone to meet 'is maker!");
@@ -387,7 +394,7 @@ user_pref("_user.js.parrot", "1200 syntax error: the parrot's a stiff!");
  * but the problem is that the browser can't know that. Setting this pref to true is the only way for the
  * browser to ensure there will be no unsafe renegotiations on the channel between the browser and the server
  * [SETUP-WEB] SSL_ERROR_UNSAFE_NEGOTIATION: is it worth overriding this for that one site?
- * [STATS] SSL Labs (May 2024) reports over 99.7% of top sites have secure renegotiation [4]
+ * [STATS] SSL Labs (June 2025) reports almost 99.85% of top sites have secure renegotiation [4]
  * [1] https://wiki.mozilla.org/Security:Renegotiation
  * [2] https://datatracker.ietf.org/doc/html/rfc5746
  * [3] https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3555
@@ -401,29 +408,6 @@ 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 | SEC_ERROR_OCSP_UNAUTHORIZED_REQUEST
- * 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
- * [3] https://letsencrypt.org/2024/12/05/ending-ocsp/ ***/
-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
@@ -432,12 +416,13 @@ user_pref("security.cert_pinning.enforcement_level", 2);
 /* 1224: enable CRLite [FF73+]
  * 0 = disabled
  * 1 = consult CRLite but only collect telemetry
- * 2 = consult CRLite and enforce both "Revoked" and "Not Revoked" results
+ * 2 = consult CRLite and enforce both "Revoked" and "Not Revoked" results (default)
- * 3 = consult CRLite and enforce "Not Revoked" results, but defer to OCSP for "Revoked" (default)
+ * 3 = consult CRLite and enforce "Not Revoked" results, but defer to OCSP for "Revoked" (removed FF145)
  * [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1429800,1670985,1753071
- * [2] https://blog.mozilla.org/security/tag/crlite/ ***/
+ * [2] https://blog.mozilla.org/security/tag/crlite/
-user_pref("security.remote_settings.crlite_filters.enabled", true); // [DEFAULT: true FF137+]
+ * [3] https://hacks.mozilla.org/2025/08/crlite-fast-private-and-comprehensive-certificate-revocation-checking-in-firefox/ ***/
-user_pref("security.pki.crlite_mode", 2);
+user_pref("security.remote_settings.crlite_filters.enabled", true); // [DEFAULT: true]
+user_pref("security.pki.crlite_mode", 2); // [DEFAULT: 2 FF142+]
 
 /** MIXED CONTENT ***/
 /* 1241: disable insecure passive content (such as images) on https pages ***/
@@ -552,7 +537,8 @@ user_pref("network.IDN_show_punycode", true);
 /* 2620: enforce PDFJS, disable PDFJS scripting
  * This setting controls if the option "Display in Firefox" is available in the setting below
  *   and by effect controls whether PDFs are handled in-browser or externally ("Ask" or "Open With")
- * [WHY] pdfjs is lightweight, open source, and secure: the last exploit was June 2015 [1]
+ * [WHY] pdfjs is lightweight, open source, and secure: In the last 10 years it has only had
+ *   two known exploits, both in 2024: one 'Severe' and one 'Important' [1]
  *   It doesn't break "state separation" of browser content (by not sharing with OS, independent apps).
  *   It maintains disk avoidance and application data isolation. It's convenient. You can still save to disk.
  * [NOTE] JS can still force a pdf to open in-browser by bundling its own code
@@ -571,7 +557,7 @@ user_pref("browser.tabs.searchclipboardfor.middleclick", false); // [DEFAULT: fa
 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);
+user_pref("privacy.antitracking.isolateContentScriptResources", true);
 /* 2640: disable CSP Level 2 Reporting [FF140+] ***/
 user_pref("security.csp.reporting.enabled", false);
 
@@ -613,15 +599,26 @@ user_pref("_user.js.parrot", "2700 syntax error: the parrot's joined the bleedin
  * [SETTING] to add site exceptions: Urlbar>ETP Shield
  * [SETTING] to manage site exceptions: Options>Privacy & Security>Enhanced Tracking Protection>Manage Exceptions ***/
 user_pref("browser.contentblocking.category", "strict"); // [HIDDEN PREF]
-/* 2702: disable ETP web compat features [FF93+]
+/* 2702: disable ETP web compat features (about:compat) [FF93+]
  * [SETUP-HARDEN] Includes skip lists, heuristics (SmartBlock) and automatic grants
  * Opener and redirect heuristics are granted for 30 days, see [3]
  * [1] https://blog.mozilla.org/security/2021/07/13/smartblock-v2/
  * [2] https://hg.mozilla.org/mozilla-central/rev/e5483fd469ab#l4.12
  * [3] https://developer.mozilla.org/docs/Web/Privacy/State_Partitioning#storage_access_heuristics ***/
    // user_pref("privacy.antitracking.enableWebcompat", false);
+/* 2705: set ETP Strict/Custom exception lists (FF141+)
+ [SETTING] Options>Privacy & Security>Enhanced Tracking Protection>Strict/Custom>Fix major [baseline] | minor [convenience]
+ [1] https://support.mozilla.org/en-US/kb/manage-enhanced-tracking-protection-exceptions
+ [2] https://etp-exceptions.mozilla.org/ ***/
+user_pref("privacy.trackingprotection.allow_list.baseline.enabled", true); // [DEFAULT: true]
+user_pref("privacy.trackingprotection.allow_list.convenience.enabled", true); // [DEFAULT: true]
 
-/*** [SECTION 2800]: SHUTDOWN & SANITIZING ***/
+/*** [SECTION 2800]: SHUTDOWN & SANITIZING
+   We enable sanitizeOnShutdown to help prevent 1st party website tracking across sessions.
+   We consider history/downloads, which are not accessible to websites, as orthogonal and exempt these
+
+   [SETUP-HARDEN] to clear all history/downloads on close, add the appropriate overrides from 2800's
+***/
 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
@@ -632,11 +629,11 @@ user_pref("privacy.sanitize.sanitizeOnShutdown", true);
 /** 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.historyFormDataAndDownloads", false); // [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.browsingHistoryAndDownloads", false); // [DEFAULT: true]
-user_pref("privacy.clearOnShutdown_v2.downloads", true); // [HIDDEN]
+user_pref("privacy.clearOnShutdown_v2.downloads", false); // [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+)
@@ -656,12 +653,12 @@ user_pref("privacy.clearOnShutdown_v2.cookiesAndStorage", true);
 /* 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.historyFormDataAndDownloads", false);
    // user_pref("privacy.clearSiteData.siteSettings", false);
 /* 2821: set manual "Clear Data" items [FF136+] ***/
-user_pref("privacy.clearSiteData.browsingHistoryAndDownloads", true);
+user_pref("privacy.clearSiteData.browsingHistoryAndDownloads", false);
 user_pref("privacy.clearSiteData.formdata", true);
 
 /** SANITIZE HISTORY: IGNORES "ALLOW" SITE EXCEPTIONS ***/
@@ -670,10 +667,10 @@ user_pref("privacy.clearSiteData.formdata", true);
  * [SETTING] Privacy & Security>History>Custom Settings>Clear History ***/
 user_pref("privacy.clearHistory.cache", true); // [DEFAULT: true]
 user_pref("privacy.clearHistory.cookiesAndStorage", false);
-user_pref("privacy.clearHistory.historyFormDataAndDownloads", true); // [DEFAULT: true]
+user_pref("privacy.clearHistory.historyFormDataAndDownloads", false); // [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.browsingHistoryAndDownloads", false); // [DEFAULT: true]
 user_pref("privacy.clearHistory.formdata", true);
 
 /** SANITIZE MANUAL: TIMERANGE ***/
@@ -692,6 +689,7 @@ user_pref("privacy.sanitize.timeSpan", 0);
    on a per site basis for compatibility (4004).
 
    https://searchfox.org/mozilla-central/source/toolkit/components/resistfingerprinting/RFPTargetsDefault.inc
+   https://support.mozilla.org/en-US/kb/firefox-protection-against-fingerprinting#w_how-does-each-protection-work
 
    [NOTE] RFPTargets + granular overrides are somewhat experimental and may produce unexpected results
    - e.g. FrameRate can only be controlled per process, not per origin
@@ -701,10 +699,10 @@ user_pref("privacy.sanitize.timeSpan", 0);
       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 (FF143+)
-      1954194: available screen resolution: return a fixed offset height from screen per platform when not full screen
+   1984333 - hardwareConcurrency: less than 8 return 4 else return 8 (FF143+)
-      1978414: hardwareConcurrency: return 2 (existing RFPTarget)
+   1977836 - maxTouchPoints: return multi-touch as 5 (FF143+)
-      1977836: maxTouchPoints: return multi-touch as 5
+   1917607 - subtly randomize WebGL's readPixels (FF145+)
 ***/
 user_pref("_user.js.parrot", "4000 syntax error: the parrot's bereft of life!");
 /* 4001: enable FPP in PB mode [FF114+]
@@ -736,7 +734,6 @@ user_pref("_user.js.parrot", "4000 syntax error: the parrot's bereft of life!");
    [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
       JS: spoofed as Windows 10, OS X 10.15, Android 10, or Linux
@@ -761,7 +758,6 @@ user_pref("_user.js.parrot", "4000 syntax error: the parrot's bereft of life!");
       Modifier events suppressed are SHIFT and both ALT keys. Chrome is not affected.
    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)
    1492766 - spoof pointerEvent.pointerid (FF65)
    1485266 - disable exposure of system colors to CSS or canvas (FF67)
    1494034 - return "light" with prefers-color-scheme (FF67)
@@ -778,6 +774,12 @@ user_pref("_user.js.parrot", "4000 syntax error: the parrot's bereft of life!");
    1794628 - return "none" with inverted-colors (FF114)
    1787790 - normalize system fonts (FF128)
    1835987 - spoof timezone as Atlantic/Reykjavik (previously FF55+ was UTC) (FF128)
+   1656377 - spoof pointerEvents azimuthAngle and altitudeAngle (FF131)
+   1826051 & 1957658 & 2021715 - spoof/suppress Pointer Events, spoof maxTouchPoints (FF132, FF143/ESR140.2, FF150)
+      previously FF64+ (1363508) it always returned maxTouchPoints as 0
+      FF132: 0 = mac | 10 = windows, linux, mobile
+      FF143: 0 = mac, linux | 10 = windows | 5 = mobile | no longer spoof touch PointerEvents | backported to ESR140.2
+      FF150: 5 = linux
    1834307 - always use smooth scrolling (FF132)
    1918202 - spoof screen orientation based on spoofed screen size and platform (FF132)
       previously FF50+ it always returned landscape-primary and an angle of 0
@@ -791,7 +793,10 @@ user_pref("_user.js.parrot", "4000 syntax error: the parrot's bereft of life!");
    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?)
+   1973265 - disable WebCodecs API (FF142)
+   1984333 - spoof navigator.hardwareConcurrency as 4 except mac return 8 (FF143)
+       previously FF55+ it returned 2
+   1999126 - enforce navigator.pdfViewerEnabled as true and plugins/mimeTypes as hard-coded values (FF147)
 ***/
 user_pref("_user.js.parrot", "4500 syntax error: the parrot's popped 'is clogs");
 /* 4501: enable RFP
@@ -833,9 +838,10 @@ user_pref("privacy.resistFingerprinting.block_mozAddonManager", true);
 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
+/* 4510: enforce Contrast Control off [FF138+]
- * [SETTING] General>Language and Appearance>Fonts and Colors>Colors>Use system colors ***/
+ * 0=automatic, 1=off, 2=custom
-user_pref("browser.display.use_system_colors", false); // [DEFAULT: false NON-WINDOWS]
+ * [SETTING] General>Language and Appearance>Contrast Control ***/
+   // user_pref("browser.display.document_color_use", 1); // [DEFAULT: 1 NON-WINDOWS]
 /* 4511: disable using system accent colors ***/
 user_pref("widget.non-native-theme.use-theme-accent", false); // [DEFAULT: false WINDOWS]
 /* 4512: enforce links targeting new windows to open in a new tab instead
@@ -935,12 +941,6 @@ user_pref("_user.js.parrot", "5000 syntax error: the parrot's taken 'is last bow
    // user_pref("browser.pagethumbnails.capturing_disabled", true); // [HIDDEN PREF]
 /* 5020: disable Windows native notifications and use app notications instead [FF111+] [WINDOWS] ***/
    // user_pref("alerts.useSystemBackend.windows.notificationserver.enabled", false);
-/* 5021: disable location bar using search
- * Don't leak URL typos to a search engine, give an error message instead
- * Examples: "secretplace,com", "secretplace/com", "secretplace com", "secret place.com"
- * [NOTE] This does not affect explicit user action such as using search buttons in the
- * dropdown, or using keyword search shortcuts you configure in options (e.g. "d" for DuckDuckGo) ***/
-   // user_pref("keyword.enabled", false);
 
 /*** [SECTION 5500]: OPTIONAL HARDENING
    Not recommended. Overriding these can cause breakage and performance issues,
@@ -1035,20 +1035,11 @@ user_pref("extensions.webcompat-reporter.enabled", false); // [DEFAULT: false]
 /* 6012: enforce Quarantined Domains [FF115+]
  * [WHY] https://support.mozilla.org/kb/quarantined-domains ***/
 user_pref("extensions.quarantinedDomains.enabled", true); // [DEFAULT: true]
-/* 6050: prefsCleaner: reset previously active items removed from arkenfox FF128+ ***/
+/* 6050: prefsCleaner: reset previously active items removed from arkenfox FF140+ ***/
-   // user_pref("privacy.clearOnShutdown.cache", "");
+   // user_pref("browser.display.use_system_colors", "");
-   // user_pref("privacy.clearOnShutdown.cookies", "");
+   // user_pref("browser.urlbar.fakespot.featureGate", "");
-   // user_pref("privacy.clearOnShutdown.downloads", "");
+   // user_pref("security.OCSP.enabled", "");
-   // user_pref("privacy.clearOnShutdown.formdata", "");
+   // user_pref("security.OCSP.require", "");
-   // 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", "");
 
 /*** [SECTION 7000]: DON'T BOTHER ***/
 user_pref("_user.js.parrot", "7000 syntax error: the parrot's pushing up daisies!");
@@ -1073,7 +1064,7 @@ user_pref("_user.js.parrot", "7000 syntax error: the parrot's pushing up daisies
 /* 7003: disable non-modern cipher suites [1]
  * [WHY] Passive fingerprinting. Minimal/non-existent threat of downgrade attacks
  * [1] https://browserleaks.com/ssl ***/
-   // user_pref("security.ssl3.ecdhe_ecdsa_aes_128_sha", false);
+   // user_pref("security.ssl3.ecdhe_ecdsa_aes_128_sha", false); // [DEFAULT: false FF150]
    // user_pref("security.ssl3.ecdhe_ecdsa_aes_256_sha", false);
    // user_pref("security.ssl3.ecdhe_rsa_aes_128_sha", false);
    // user_pref("security.ssl3.ecdhe_rsa_aes_256_sha", false);
@@ -1119,7 +1110,9 @@ user_pref("_user.js.parrot", "7000 syntax error: the parrot's pushing up daisies
    // user_pref("extensions.systemAddon.update.enabled", false); // [FF62+]
    // user_pref("extensions.systemAddon.update.url", ""); // [FF44+]
 /* 7015: enable the DNT (Do Not Track) HTTP header
- * [WHY] DNT is enforced with Tracking Protection which is used in ETP Strict (2701) ***/
+ * [WHY] Fingerprintable. In FF141+ DNT is never enabled. DNT is slated for deprecation [1]
+   [NOTE] In FF140, DNT is enforced with Tracking Protection which is used in ETP Strict (2701)
+   [1] https://bugzilla.mozilla.org/1967420 ***/
    // user_pref("privacy.donottrackheader.enabled", true);
 /* 7016: customize ETP settings
  * [NOTE] FPP (fingerprintingProtection) is ignored when RFP (4501) is enabled
@@ -1159,10 +1152,16 @@ user_pref("_user.js.parrot", "7000 syntax error: the parrot's pushing up daisies
  * [WHY] Passive and active fingerprinting. Mostly redundant with Tracking Protection
  * in ETP Strict (2701) and sanitizing on close (2800s) ***/
    // user_pref("privacy.globalprivacycontrol.enabled", true);
+/* 7022: bFPP (baselineFingerprintingProtection) [FF139+]
+ * [WHY] Arkenfox only supports ETP Strict (2701) which enables FPP browser-wide (normal and private
+ * browsing window contexts). If FPP is enabled in the same context as bFPP, FPP takes precedence.
+   // user_pref("privacy.baselineFingerprintingProtection", true);
+   // user_pref("privacy.baselineFingerprintingProtection.granularOverrides", "");
+   // user_pref("privacy.baselineFingerprintingProtection.overrides", "");
 
 /*** [SECTION 8000]: DON'T BOTHER: FINGERPRINTING
-   [WHY] They are insufficient to help anti-fingerprinting and do more harm than good
+   [WHY] They are insufficient for fingerprinting protection and do more harm than good
-   [WARNING] DO NOT USE with RFP. RFP already covers these and they can interfere
+   [WARNING] DO NOT USE: they can interfere with built-in solutions such as RFP and FPP
 ***/
 user_pref("_user.js.parrot", "8000 syntax error: the parrot's crossed the Jordan");
 /* 8001: prefsCleaner: reset items useless for anti-fingerprinting ***/
@@ -1192,6 +1191,8 @@ user_pref("_user.js.parrot", "8000 syntax error: the parrot's crossed the Jordan
    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.
 
+   READ: https://ritter.vg/blog-telemetry.html
+
    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
@@ -1218,7 +1219,7 @@ 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
+/* 8502: 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
@@ -1253,20 +1254,13 @@ 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!");
-/* ESR128.x still uses all the following prefs
+/* ESR140.x still uses all the following prefs
 // [NOTE] replace the * with a slash in the line above to re-enable active ones
-// FF132
+// FF148
-// 2617: remove webchannel whitelist
+// 0603: disable predictor / prefetching
-   // [-] https://bugzilla.mozilla.org/1275612
+  // [-] https://bugzilla.mozilla.org/2006028
-   // user_pref("webchannel.allowObject.urlWhitelist", "");
+user_pref("network.predictor.enabled", false); // [DEFAULT: false FF144+]
-// FF140
+user_pref("network.predictor.enable-prefetch", false); // [FF48+] [DEFAULT: false]
-// 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 ***/