144.0 (#429)

* install.py: add shebang

* install.py: remove old version of _get_firefox_version

* install.py: search for Firefox installation, including flatpak version

* install.py: add option to disable 'Press ENTER to exit'

* install.py: fix windows root

Fastfox.js

@@ -3,7 +3,7 @@
  * Fastfox                                                                              *
  * "Non ducor duco"                                                                     *
  * priority: speedy browsing                                                            *
- * version: 137                                                                         *
+ * version: 144                                                                         *
  * url: https://github.com/yokoffing/Betterfox                                          *
  ***************************************************************************************/
 
@@ -22,6 +22,12 @@
 //user_pref("nglayout.initialpaint.delay", 5); // DEFAULT; formerly 250
     //user_pref("nglayout.initialpaint.delay_in_oopif", 5); // DEFAULT
 
+// PREF: Font rendering cache in Skia (32MB)
+// Increases font cache size to improve performance on text-heavy websites.
+// Especially beneficial for sites with many font faces or complex typography.
+// [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1239151#c2
+user_pref("gfx.content.skia-font-cache-size", 32); // 32 MB; default=5; Chrome=20
+
 // PREF: page reflow timer
 // Rather than wait until a page has completely downloaded to display it to the user,
 // web browsers will periodically render what has been received to that point.
@@ -33,7 +39,7 @@
 // false = reflow pages whenever new data is received
 //user_pref("content.notify.ontimer", true); // DEFAULT
 
-// PREF: notification interval (in microseconds) to avoid layout thrashing
+// PREF: content notification delay - notification interval (in microseconds) to avoid layout thrashing
 // When Firefox is loading a page, it periodically reformats
 // or "reflows" the page as it loads. The page displays new elements
 // every 0.12 seconds by default. These redraws increase the total page load time.
@@ -47,7 +53,17 @@
 // [1] https://searchfox.org/mozilla-central/rev/c1180ea13e73eb985a49b15c0d90e977a1aa919c/modules/libpref/init/StaticPrefList.yaml#1824-1834
 // [2] https://web.archive.org/web/20240115073722/https://dev.opera.com/articles/efficient-javascript/?page=3#reflow
 // [3] https://web.archive.org/web/20240115073722/https://dev.opera.com/articles/efficient-javascript/?page=3#smoothspeed
-user_pref("content.notify.interval", 100000); // (.10s); default=120000 (.12s)
+//user_pref("content.notify.interval", 100000); // (.10s); default=120000 (.12s)
+//user_pref("content.max.tokenizing.time", 1000000); // (1.00s); alt=2000000; HIDDEN
+//user_pref("content.interrupt.parsing", true); // HIDDEN
+//user_pref("content.notify.ontimer", true); // DEFAULT
+
+// PREF: UI responsiveness threshold
+//user_pref("content.switch.threshold", 300000); // HIDDEN; default= 750000; alt=500000
+
+// PREF: split text nodes to a length
+// The number of bytes in a text node.
+//user_pref("content.maxtextrun", 8191); // DEFAULT; HIDDEN
 
 // PREF: new tab preload
 // [WARNING] Disabling this may cause a delay when opening a new tab in Firefox.
@@ -78,6 +94,15 @@ user_pref("content.notify.interval", 100000); // (.10s); default=120000 (.12s)
 // PREF: lazy load iframes
 //user_pref("dom.iframe_lazy_loading.enabled", true); // DEFAULT [FF121+]
 
+// PREF: Prioritized Task Scheduling API 
+// [1] https://github.com/yokoffing/Betterfox/issues/355
+// [2] https://blog.mozilla.org/performance/2022/06/02/prioritized-task-scheduling-api-is-prototyped-in-nightly/
+// [3] https://medium.com/airbnb-engineering/building-a-faster-web-experience-with-the-posttask-scheduler-276b83454e91
+// [4] https://github.com/WICG/scheduling-apis/blob/main/explainers/prioritized-post-task.md
+// [5] https://wicg.github.io/scheduling-apis/
+// [6] https://caniuse.com/mdn-api_taskcontroller
+//user_pref("dom.enable_web_task_scheduling", true); // DEFAULT [FF142+]
+
 /****************************************************************************
  * SECTION: GFX RENDERING TWEAKS                                            *
 ****************************************************************************/
@@ -109,10 +134,13 @@ user_pref("content.notify.interval", 100000); // (.10s); default=120000 (.12s)
 // [2] https://github.com/yokoffing/Betterfox/issues/153
 // [3] https://github.com/yokoffing/Betterfox/issues/198
 //user_pref("gfx.canvas.accelerated", true); // [DEFAULT FF133+]
-    //user_pref("gfx.canvas.accelerated.cache-items", 8192); // DEFAULT FF135+; Chrome=4096
+user_pref("gfx.canvas.accelerated.cache-items", 32768); // [default=8192 FF135+]; Chrome=4096
-    user_pref("gfx.canvas.accelerated.cache-size", 512); // default=256; Chrome=512
+user_pref("gfx.canvas.accelerated.cache-size", 4096); // default=256; Chrome=512
-    user_pref("gfx.content.skia-font-cache-size", 20); // default=5; Chrome=20
+//user_pref("gfx.canvas.max-size", 32767); // DEFAULT=32767
-    // [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1239151#c2
+
+// PREF: WebGL
+user_pref("webgl.max-size", 16384); // default=1024
+//user_pref("webgl.force-enabled", true);
 
 // PREF: prefer GPU over CPU
 // At best, the prefs do nothing on Linux/macOS.
@@ -179,7 +207,7 @@ user_pref("browser.cache.disk.enable", false);
 // for recently read cache entries [1]. It is managed by a cache thread, and caches with
 // metadata in the pool appear to be reused immediately.
 // [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=986179
-//user_pref("browser.cache.disk.metadata_memory_limit", 500); // default=250 (0.25 MB); limit of recent metadata we keep in memory for faster access
+//user_pref("browser.cache.disk.metadata_memory_limit", 16384); // default=250 (0.25 MB); limit of recent metadata we keep in memory for faster access
 
 // PREF: number of chunks we preload ahead of read
 // Large content such as images will load faster.
@@ -256,11 +284,12 @@ user_pref("browser.cache.disk.enable", false);
 // Value can be up to the max size of an unsigned 64-bit integer.
 // -1 = Automatically decide the maximum memory to use to cache decoded images,
 // messages, and chrome based on the total amount of RAM
+// For machines with 8GB+ RAM, that equals 32768 kb = 32 MB
 // [1] https://kb.mozillazine.org/Browser.cache.memory.capacity#-1
 // [2] https://searchfox.org/mozilla-central/source/netwerk/cache2/CacheObserver.cpp#94-125
 // [3] https://github.com/WaterfoxCo/Waterfox/commit/3fed16932c80a2f6b37d126fe10aed66c7f1c214
-//user_pref("browser.cache.memory.capacity", -1); // DEFAULT; 256000=256 MB; 512000=500 MB; 1048576=1GB, 2097152=2GB
+user_pref("browser.cache.memory.capacity", 131072); // 128 MB RAM cache; alt=65536 (65 MB RAM cache); default=32768
-//user_pref("browser.cache.memory.max_entry_size", 10240); // (10 MB); default=5120 (5 MB)
+user_pref("browser.cache.memory.max_entry_size", 20480); // 20 MB max entry; default=5120 (5 MB)
 
 // PREF: amount of Back/Forward cached pages stored in memory for each tab
 // Pages that were recently visited are stored in memory in such a way
@@ -271,7 +300,15 @@ user_pref("browser.cache.disk.enable", false);
 // is no reason for Firefox to keep memory for this.
 // -1=determine automatically (8 pages)
 // [1] https://kb.mozillazine.org/Browser.sessionhistory.max_total_viewers#Possible_values_and_their_effects
-//user_pref("browser.sessionhistory.max_total_viewers", 4);
+user_pref("browser.sessionhistory.max_total_viewers", 4); // default=8
+user_pref("browser.sessionstore.max_tabs_undo", 10); // default=25
+//user_pref("browser.sessionstore.max_entries", 10); // [HIDDEN OR REMOVED]
+//user_pref("dom.storage.default_quota", 20480); // 20MB; default=5120
+//user_pref("dom.storage.shadow_writes", true);
+
+// PREF: tell garbage collector to start running when javascript is using xx MB of memory
+// Garbage collection releases memory back to the system.
+//user_pref("javascript.options.mem.high_water_mark", 128); // DEFAULT [HIDDEN OR REMOVED]
 
 /****************************************************************************
  * SECTION: MEDIA CACHE                                                     *
@@ -282,11 +319,11 @@ user_pref("browser.cache.disk.enable", false);
 
 // PREF: media memory cache
 // [1] https://hg.mozilla.org/mozilla-central/file/tip/modules/libpref/init/StaticPrefList.yaml#l9652
-// [2] https://github.com/arkenfox/user.js/pull/941
+// [2] https://github.com/arkenfox/user.js/pull/941#issuecomment-668278121
-user_pref("media.memory_cache_max_size", 65536); // default=8192; AF=65536; alt=131072
+user_pref("media.memory_cache_max_size", 262144); // 256 MB; default=8192; AF=65536
 
 // PREF: media cache combine sizes
-//user_pref("media.memory_caches_combined_limit_kb", 524288); // DEFAULT; alt=1048576
+user_pref("media.memory_caches_combined_limit_kb", 1048576); // 1GB; default=524288
 //user_pref("media.memory_caches_combined_limit_pc_sysmem", 5); // DEFAULT; alt=10; the percentage of system memory that Firefox can use for media caches
 
 // PREF: Media Source Extensions (MSE) web standard
@@ -300,19 +337,20 @@ user_pref("media.memory_cache_max_size", 65536); // default=8192; AF=65536; alt=
 // PREF: adjust video buffering periods when not using MSE (in seconds)
 // [NOTE] Does not affect videos over 720p since they use DASH playback [1]
 // [1] https://lifehacker.com/preload-entire-youtube-videos-by-disabling-dash-playbac-1186454034
-user_pref("media.cache_readahead_limit", 7200); // 120 min; default=60; stop reading ahead when our buffered data is this many seconds ahead of the current playback
+user_pref("media.cache_readahead_limit", 600); // 10 min; default=60; stop reading ahead when our buffered data is this many seconds ahead of the current playback
-user_pref("media.cache_resume_threshold", 3600); // 60 min; default=30; when a network connection is suspended, don't resume it until the amount of buffered data falls below this threshold
+user_pref("media.cache_resume_threshold", 300); // 5 min; default=30; when a network connection is suspended, don't resume it until the amount of buffered data falls below this threshold
 
 /****************************************************************************
  * SECTION: IMAGE CACHE                                                     *
 ****************************************************************************/
 
 // PREF: image cache
-//user_pref("image.cache.size", 5242880); // DEFAULT; in MiB; alt=10485760 (cache images up to 10MiB in size)
+user_pref("image.cache.size", 10485760); // (cache images up to 10MiB in size) [DEFAULT 5242880]
-user_pref("image.mem.decode_bytes_at_a_time", 32768); // default=16384; alt=65536; chunk size for calls to the image decoders
+user_pref("image.mem.decode_bytes_at_a_time", 65536); // default=16384; alt=32768; chunk size for calls to the image decoders
+//user_pref("image.mem.max_decoded_image_kb", 512000); // 500MB [HIDDEN OR REMOVED?]
 
 // PREF: set minimum timeout to unmap shared surfaces since they have been last used
-// This is only used on 32-bit builds of Firefox where there is meaningful
+// [NOTE] This is only used on 32-bit builds of Firefox where there is meaningful
 // virtual address space pressure.
 // [1] https://phabricator.services.mozilla.com/D109440
 // [2] https://bugzilla.mozilla.org/show_bug.cgi?id=1699224
@@ -340,6 +378,7 @@ user_pref("network.http.max-connections", 1800); // default=900
 user_pref("network.http.max-persistent-connections-per-server", 10); // default=6; download connections; anything above 10 is excessive
     user_pref("network.http.max-urgent-start-excessive-connections-per-host", 5); // default=3
     //user_pref("network.http.max-persistent-connections-per-proxy", 48); // default=32
+user_pref("network.http.request.max-start-delay", 5); // default=10
 //user_pref("network.websocket.max-connections", 200); // DEFAULT
 
 // PREF: pacing requests [FF23+]
@@ -353,17 +392,17 @@ user_pref("network.http.max-persistent-connections-per-server", 10); // default=
 // true = Firefox will pace requests (default)
 user_pref("network.http.pacing.requests.enabled", false);
     //user_pref("network.http.pacing.requests.min-parallelism", 10); // default=6
-    //user_pref("network.http.pacing.requests.burst", 14); // default=10
+    //user_pref("network.http.pacing.requests.burst", 32); // default=10
 
 // PREF: increase DNS cache
 // [1] https://developer.mozilla.org/en-US/docs/Web/Performance/Understanding_latency
-//user_pref("network.dnsCacheEntries", 1000); // default=400
+user_pref("network.dnsCacheEntries", 10000); // default=800
 
 // PREF: adjust DNS expiration time
 // [ABOUT] about:networking#dns
 // [NOTE] These prefs will be ignored by DNS resolver if using DoH/TRR.
-user_pref("network.dnsCacheExpiration", 3600); // keep entries for 1 hour
+user_pref("network.dnsCacheExpiration", 3600); // keep entries for 1 hour; default=60
-    //user_pref("network.dnsCacheExpirationGracePeriod", 240); // default=60; cache DNS entries for 4 minutes after they expire
+    //user_pref("network.dnsCacheExpirationGracePeriod", 120); // default=60; cache DNS entries for 2 minutes after they expire
 
 // PREF: the number of threads for DNS
 //user_pref("network.dns.max_high_priority_threads", 40); // DEFAULT [FF 123?]
@@ -403,7 +442,7 @@ user_pref("network.ssl_tokens_cache_capacity", 10240); // default=2048; more TLS
 // [3] https://searchfox.org/mozilla-central/rev/028c68d5f32df54bca4cf96376f79e48dfafdf08/modules/libpref/init/all.js#1280-1282
 // [4] https://www.keycdn.com/blog/resource-hints#prefetch
 // [5] https://3perf.com/blog/link-rels/#prefetch
-//user_pref("network.http.speculative-parallel-limit", 20); // DEFAULT (FF127+?)
+user_pref("network.http.speculative-parallel-limit", 0);
 
 // PREF: DNS prefetching for HTMLLinkElement <link rel="dns-prefetch">
 // Used for cross-origin connections to provide small performance improvements.
@@ -436,11 +475,11 @@ user_pref("network.dns.disablePrefetch", true);
 // [NOTE] Firefox will perform DNS lookup (if enabled) and TCP and TLS handshake,
 // but will not start sending or receiving HTTP data.
 // [1] https://www.ghacks.net/2017/07/24/disable-preloading-firefox-autocomplete-urls/
-//user_pref("browser.urlbar.speculativeConnect.enabled", false);
+user_pref("browser.urlbar.speculativeConnect.enabled", false);
 
 // PREF: mousedown speculative connections on bookmarks and history [FF98+]
 // Whether to warm up network connections for places:menus and places:toolbar.
-//user_pref("browser.places.speculativeConnect.enabled", false);
+user_pref("browser.places.speculativeConnect.enabled", false);
 
 // PREF: network module preload <link rel="modulepreload"> [FF115+]
 // High-priority loading of current page JavaScript modules.
@@ -498,7 +537,7 @@ user_pref("network.prefetch-next", false);
 // When enabled, it trains and uses Firefox's algorithm to preload page resource
 // by tracking past page resources. It uses a local file (history) of needed images,
 // scripts, etc. to request them preemptively when navigating.
-// [NOTE] By default, it only preconnects, doing DNS, TCP, and SSL handshakes.
+// [NOTE] By default, it only preconnects DNS, TCP, and SSL handshakes.
 // No data sends until clicking. With "network.predictor.enable-prefetch" enabled,
 // it also performs prefetches.
 // [1] https://wiki.mozilla.org/Privacy/Reviews/Necko
@@ -540,16 +579,7 @@ user_pref("network.predictor.enabled", false);
 // PREF: CSS Masonry Layout [NIGHTLY]
 // [1] https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Grid_Layout/Masonry_Layout
 // [2] https://www.smashingmagazine.com/native-css-masonry-layout-css-grid/
-user_pref("layout.css.grid-template-masonry-value.enabled", true);
+//user_pref("layout.css.grid-template-masonry-value.enabled", true);
-
-// PREF: Prioritized Task Scheduling API [NIGHTLY]
-// [1] https://github.com/yokoffing/Betterfox/issues/355
-// [2] https://blog.mozilla.org/performance/2022/06/02/prioritized-task-scheduling-api-is-prototyped-in-nightly/
-// [3] https://medium.com/airbnb-engineering/building-a-faster-web-experience-with-the-posttask-scheduler-276b83454e91
-// [4] https://github.com/WICG/scheduling-apis/blob/main/explainers/prioritized-post-task.md
-// [5] https://wicg.github.io/scheduling-apis/
-// [6] https://caniuse.com/mdn-api_taskcontroller
-//user_pref("dom.enable_web_task_scheduling", true);
 
 /****************************************************************************
  * SECTION: TAB UNLOAD                                                      *
@@ -597,6 +627,7 @@ user_pref("layout.css.grid-template-masonry-value.enabled", true);
 // [2] https://firefox-source-docs.mozilla.org/dom/ipc/process_model.html#web-content-processes 
 //user_pref("dom.ipc.processCount", 8); // DEFAULT; Shared Web Content
 //user_pref("dom.ipc.processCount.webIsolated", 1); // default=4; Isolated Web Content
+//user_pref("dom.ipc.keepProcessesAlive.web", 4); // default=1 [HIDDEN OR REMOVED]
 
 // PREF: use one process for process preallocation cache
 //user_pref("dom.ipc.processPrelaunch.fission.number", 1); // default=3; Process Preallocation Cache

Peskyfox.js

@@ -3,7 +3,7 @@
  * Peskyfox                                                                 *
  * "Aquila non capit muscas"                                                *
  * priority: remove annoyances                                              *
- * version: 137                                                             *
+ * version: 144                                                             *
  * url: https://github.com/yokoffing/Betterfox                              *
  * credit: Some prefs are reproduced and adapted from the arkenfox project  *
  * credit urL: https://github.com/arkenfox/user.js                          *
@@ -29,14 +29,6 @@ user_pref("extensions.htmlaboutaddons.recommendations.enabled", false);
 // [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to make personalized extension recommendations
 user_pref("browser.discovery.enabled", false);
 
-// PREF: disable Fakespot integration [FF116+]
-// [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1840156#c0
-// [2] https://github.com/arkenfox/user.js/issues/1730
-// [3] https://www.fakespot.com/
-// [4] https://www.ghacks.net/2023/10/12/firefox-will-soon-tell-you-if-product-reviews-are-reliable/
-//user_pref("browser.shopping.experience2023.enabled", false); // DEFAULT
-//user_pref("browser.shopping.experience2023.ads.exposure", false); // DEFAULT [FF121+]
-
 // PREF: disable Firefox from asking to set as the default browser
 // [1] https://github.com/yokoffing/Betterfox/issues/166
 user_pref("browser.shell.checkDefaultBrowser", false);
@@ -72,6 +64,9 @@ user_pref("browser.profiles.enabled", true);
 // [1] https://github.com/yokoffing/Betterfox/issues/320
 //user_pref("widget.gtk.non-native-titlebar-buttons.enabled", true);
 
+// PREF: disable search engine switcher in the URL bar [FF136+]
+//user_pref("browser.urlbar.scotchBonnet.enableOverride", false);
+
 /****************************************************************************
  * SECTION: THEME ADJUSTMENTS                                              *
 ****************************************************************************/
@@ -104,6 +99,26 @@ user_pref("browser.privateWindowSeparation.enabled", false);
 // PREF: new tab page wallpapers
 //user_pref("browser.newtabpage.activity-stream.newtabWallpapers.v2.enabled", true); // [DEFAULT FF132+]
 
+/****************************************************************************
+ * SECTION: AI                                                              *
+****************************************************************************/
+// PREF: AI master switch
+// [1] https://github.com/yokoffing/Betterfox/issues/416
+user_pref("browser.ml.enable", false);
+
+// PREF: AI chat
+user_pref("browser.ml.chat.enabled", false);
+
+// PREF: AI chatbot option in right click menu
+user_pref("browser.ml.chat.menu", false);
+
+// PREF: AI-enhanced tab groups
+// [1] https://support.mozilla.org/kb/how-use-ai-enhanced-tab-groups
+user_pref("browser.tabs.groups.smart.enabled", false);
+
+// PREF: link previews
+user_pref("browser.ml.linkPreview.enabled", false);
+
 /****************************************************************************
  * SECTION: COOKIE BANNER HANDLING                                          *
 ****************************************************************************/
@@ -195,7 +210,7 @@ user_pref("browser.urlbar.suggest.engines", false);
 //user_pref("browser.urlbar.suggest.weather", true); // DEFAULT [FF108]
     //user_pref("browser.urlbar.weather.ignoreVPN", false); // DEFAULT
 //user_pref("browser.urlbar.suggest.calculator", true); // [DEFAULT FF137+]
-user_pref("browser.urlbar.unitConversion.enabled", true);
+//user_pref("browser.urlbar.unitConversion.enabled", true); // [DEFAULT FF141+]
 
 // PREF: disable dropdown suggestions with empty query
 //user_pref("browser.urlbar.suggest.topsites", false);
@@ -207,10 +222,11 @@ user_pref("browser.urlbar.trending.featureGate", false);
 
 // PREF: 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.wikipedia.featureGate", false); // [FF141+]
 //user_pref("browser.urlbar.clipboard.featureGate", false); // [FF118+] [DEFAULT: true FF125+]
 //user_pref("browser.urlbar.yelp.featureGate", false); // [FF124+] [DEFAULT: false]
 
@@ -238,11 +254,13 @@ user_pref("browser.urlbar.trending.featureGate", false);
 //user_pref("browser.urlbar.maxRichResults", 5); // default=10
 
 // PREF: text fragments
+// [WARNING] Enabling can cause tab crashes [4]
 // [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1753933#c6
 // [2] https://developer.mozilla.org/en-US/docs/Web/Text_fragments
 // [3] https://web.dev/articles/text-fragments
+// [4] https://github.com/yokoffing/Betterfox/issues/397
 //user_pref("dom.text_fragments.enabled", true); // [DEFAULT]
-user_pref("dom.text_fragments.create_text_fragment.enabled", true);
+//user_pref("dom.text_fragments.create_text_fragment.enabled", true);
 
 /****************************************************************************
  * SECTION: AUTOPLAY                                                        *
@@ -290,11 +308,12 @@ user_pref("dom.text_fragments.create_text_fragment.enabled", true);
 //user_pref("browser.newtabpage.activity-stream.discoverystream.enabled", false);
 //user_pref("browser.newtabpage.activity-stream.showSearch", true); // NTP Web Search [DEFAULT]
 //user_pref("browser.newtabpage.activity-stream.feeds.topsites", false); // Shortcuts
-      user_pref("browser.newtabpage.activity-stream.showSponsoredTopSites", false); // Shortcuts > Sponsored shortcuts [FF83+]
+      user_pref("browser.newtabpage.activity-stream.showSponsoredTopSites", false); // Sponsored shortcuts [FF83+]
 //user_pref("browser.newtabpage.activity-stream.showWeather", false); // Weather [FF130+]
     //user_pref("browser.newtabpage.activity-stream.system.showWeather", false); // hides Weather as an UI option
 user_pref("browser.newtabpage.activity-stream.feeds.section.topstories", false); // Recommended by Pocket
-      user_pref("browser.newtabpage.activity-stream.showSponsored", false); // Sponsored Stories [FF58+]  
+user_pref("browser.newtabpage.activity-stream.showSponsored", false); // Sponsored stories [FF58+]  
+user_pref("browser.newtabpage.activity-stream.showSponsoredCheckboxes", false); // [FF140+] Support Firefox
 //user_pref("browser.newtabpage.activity-stream.feeds.section.highlights", false); // Recent Activity [DEFAULT]
       //user_pref("browser.newtabpage.activity-stream.section.highlights.includeBookmarks", false);
       //user_pref("browser.newtabpage.activity-stream.section.highlights.includeDownloads", false);
@@ -324,8 +343,9 @@ user_pref("browser.newtabpage.activity-stream.default.sites", "");
  * SECTION: POCKET                                                            *
 ******************************************************************************/
 
-// PREF: Disable built-in Pocket extension
+// PREF: disable built-in Pocket extension
-user_pref("extensions.pocket.enabled", false);
+// [1] https://support.mozilla.org/kb/future-of-pocket
+//user_pref("extensions.pocket.enabled", false); // DEFAULT
       //user_pref("extensions.pocket.api"," ");
       //user_pref("extensions.pocket.oAuthConsumerKey", " ");
       //user_pref("extensions.pocket.site", " ");

README.md

@@ -1,4 +1,4 @@
-![GitHub Maintained](https://img.shields.io/badge/maintained-yes-green)![GitHub last commit](https://img.shields.io/github/last-commit/yokoffing/betterfox)![GitHub issues](https://img.shields.io/github/issues/yokoffing/betterfox)![GitHub closed issues](https://img.shields.io/github/issues-closed/yokoffing/betterfox)![GitHub repo size](https://img.shields.io/github/repo-size/yokoffing/betterfox)[![shields.io Stars](https://img.shields.io/github/stars/yokoffing/betterfox)](https://github.com/yokoffing/betterfox/stargazers)
+![Badge](https://hitscounter.dev/api/hit?url=https%3A%2F%2Fgithub.com%2Fyokoffing%2FBetterfox&label=&icon=github&color=%23198754&message=&style=flat&tz=US%2FEastern)![GitHub Maintained](https://img.shields.io/badge/maintained-yes-green)![GitHub last commit](https://img.shields.io/github/last-commit/yokoffing/betterfox)![GitHub issues](https://img.shields.io/github/issues/yokoffing/betterfox)![GitHub closed issues](https://img.shields.io/github/issues-closed/yokoffing/betterfox)![GitHub repo size](https://img.shields.io/github/repo-size/yokoffing/betterfox)[![shields.io Stars](https://img.shields.io/github/stars/yokoffing/betterfox)](https://github.com/yokoffing/betterfox/stargazers)
 
 # Betterfox
 [about:config](https://support.mozilla.org/en-US/kb/about-config-editor-firefox) tweaks to enhance [Mozilla Firefox](https://www.mozilla.org/en-US/firefox/new/).
@@ -46,9 +46,10 @@ The `user.js` — a configuration file that controls Firefox settings — is cur
 > While the browsers listed below incorporate Betterfox to some extent, they often modify it in ways that reduce its effectiveness. For optimal results, apply the `user.js` file even when using Firefox forks.
 
 * [Zen](https://github.com/zen-browser/desktop?tab=readme-ov-file) | [files](https://github.com/zen-browser/desktop/blob/stable/src/browser/app/profile/zen-browser.js) (July 2024)
+* [FireDragon](https://github.com/dr460nf1r3/firedragon-browser/blob/master/README.md) | [files](https://github.com/dr460nf1r3/firedragon-browser/blob/55fc6e5029542cd90fabe23cb44c89568d74d006/firedragon.cfg#L822-L824) (Jan 2024?)
 * [Midori](https://github.com/goastian/midori-desktop/blob/ESR115/README.md) | [files](https://github.com/goastian/midori-desktop/blob/f3d8d96eb8e08f35a64e3c957bea4e839d7c7730/floorp/browser/components/userjsUtils.sys.mjs#L28-L33) (Dec 2023?)
 * [Mercury](https://github.com/Alex313031/Mercury/releases/tag/v.115.3.0) | [files](https://github.com/Alex313031/Mercury/commit/eb9600f9fb8f48c8f5b5c6f3264fbcdb5caff7f5) (Sep 2023)
-* [Waterfox](https://www.waterfox.net/en-US/docs/releases/G6.0/) | [files](https://github.com/WaterfoxCo/Waterfox/tree/current/waterfox/browser/app/profile) (Sep 2023)
+* [Waterfox](https://www.waterfox.net/docs/releases/G6.0/) | [files](https://github.com/WaterfoxCo/Waterfox/tree/current/waterfox/browser/app/profile) (Sep 2023)
 * [Floorp](https://github.com/Floorp-Projects/Floorp#-betterfox) <sup>[1](https://github.com/Floorp-Projects/Floorp/issues/233#issuecomment-1543557167) [2](https://blog.ablaze.one/3135/2023-04-01/)</sup> | [files](https://github.com/Floorp-Projects/Floorp/blob/ESR115/floorp/browser/components/preferences/userjs.inc.xhtml) (Apr 2023)
 * [Pulse](https://github.com/pulse-browser/browser#%EF%B8%8F-credits) | [files](https://github.com/pulse-browser/browser/tree/alpha/src/browser/app/profile) (Dec 2021)
 * [Ghostery Private Browser](https://github.com/ghostery/user-agent-desktop#community) <sup>[1](https://web.archive.org/web/20210509171835/https://www.ghostery.com/ghostery-dawn-update-more/) [2](https://web.archive.org/web/20210921114333/https://www.ghostery.com/ghostery-dawn-product-update/)</sup> | [files](https://github.com/ghostery/user-agent-desktop/tree/main/brands/ghostery/branding/pref) (Feb 2021)
@@ -103,7 +104,3 @@ If you like the project, leave a :star: (top right) and become a [stargazer](htt
 * Thanks to [Denperidge](https://github.com/Denperidge) for adding [`install.py`](https://github.com/yokoffing/Betterfox/blob/main/install.py) for advanced users in v.131.
 * A special thanks to [Alex Kontos](https://github.com/MrAlex94) of [Waterfox](https://github.com/WaterfoxCo/Waterfox) for his collaboration in v.116.
 * Many thanks to the 2021 [Ghostery](https://github.com/ghostery) team for testing Betterfox at scale in its early days.
-
-<div align='center'>
-  <a href='https://www.websitecounterfree.com'><img src='https://www.websitecounterfree.com/c.php?d=9&id=19653&s=1' border='0' alt='Free Website Counter'></a><br / >
-since 23 July 2022</div>

Securefox.js

@@ -3,7 +3,7 @@
  * Securefox                                                                *
  * "Natura non contristatur"                                                *     
  * priority: provide sensible security and privacy                          *
- * version: 137                                                             *
+ * version: 144                                                             *
  * url: https://github.com/yokoffing/Betterfox                              *
  * credit: Most prefs are reproduced and adapted from the arkenfox project  *
  * credit urL: https://github.com/arkenfox/user.js                          *
@@ -22,6 +22,9 @@
 // [1] https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop
 // [2] https://www.reddit.com/r/firefox/comments/l7xetb/network_priority_for_firefoxs_enhanced_tracking/gle2mqn/?web2x&context=3
 user_pref("browser.contentblocking.category", "strict"); // [HIDDEN]
+// [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1970647
+user_pref("privacy.trackingprotection.allow_list.baseline.enabled", true); // [FF142+]
+//user_pref("privacy.trackingprotection.allow_list.convenience.enabled", true); // [FF142+]
 //user_pref("privacy.trackingprotection.enabled", true); // enabled with "Strict"
 //user_pref("privacy.trackingprotection.pbmode.enabled", true); // DEFAULT
 //user_pref("browser.contentblocking.customBlockList.preferences.ui.enabled", false); // DEFAULT
@@ -61,7 +64,7 @@ user_pref("browser.contentblocking.category", "strict"); // [HIDDEN]
 // [2] https://www.youtube.com/watch?v=VE8SrClOTgw
 // [3] https://searchfox.org/mozilla-central/source/browser/extensions/webcompat/data/shims.js
 //user_pref("extensions.webcompat.enable_shims", true); // [HIDDEN] enabled with "Strict"
-//user_pref("extensions.webcompat.smartblockEmbeds.enabled", true); // enabled with "Strict"
+//user_pref("extensions.webcompat.smartblockEmbeds.enabled", true); // [DEFAULT FF137+]
 
 // PREF: allow embedded tweets and reddit posts [FF136+]
 // [TEST - reddit embed] https://www.pcgamer.com/amazing-halo-infinite-bugs-are-already-rolling-in/
@@ -71,6 +74,7 @@ user_pref("browser.contentblocking.category", "strict"); // [HIDDEN]
 // [TEST - truthsocial embed] https://www.newsweek.com/donald-trump-congratulates-patrick-brittany-mahomes-new-baby-2027097
 // [1] https://www.reddit.com/r/firefox/comments/l79nxy/firefox_dev_is_ignoring_social_tracking_preference/gl84ukk
 // [2] https://www.reddit.com/r/firefox/comments/pvds9m/reddit_embeds_not_loading/
+// [3] https://github.com/yokoffing/Betterfox/issues/413
 //user_pref("urlclassifier.trackingSkipURLs", "embed.reddit.com, *.twitter.com, *.twimg.com"); // MANUAL [FF136+]
 //user_pref("urlclassifier.features.socialtracking.skipURLs", "*.twitter.com, *.twimg.com"); // MANUAL [FF136+]
 
@@ -121,6 +125,7 @@ user_pref("browser.contentblocking.category", "strict"); // [HIDDEN]
 // [5] https://hacks.mozilla.org/2021/02/introducing-state-partitioning/
 // [6] https://github.com/arkenfox/user.js/issues/1281
 // [7] https://hacks.mozilla.org/2022/02/improving-the-storage-access-api-in-firefox/
+// [8] https://blog.includesecurity.com/2025/04/cross-site-websocket-hijacking-exploitation-in-2025/
 //user_pref("network.cookie.cookieBehavior", 5); // DEFAULT FF103+
 //user_pref("network.cookie.cookieBehavior.optInPartitioning", true); // [ETP FF132+]
 //user_pref("browser.contentblocking.reject-and-isolate-cookies.preferences.ui.enabled", true); // DEFAULT
@@ -166,6 +171,7 @@ user_pref("browser.contentblocking.category", "strict"); // [HIDDEN]
 // [6] https://web.dev/samesite-cookies-explained/
 // [7] https://portswigger.net/web-security/csrf/bypassing-samesite-restrictions
 // [8] https://developer.mozilla.org/en-US/docs/Web/HTTP/Cookies
+// [9] https://blog.includesecurity.com/2025/04/cross-site-websocket-hijacking-exploitation-in-2025/
 // [TEST] https://samesite-sandbox.glitch.me/
 //user_pref("network.cookie.sameSite.laxByDefault", true);
 //user_pref("network.cookie.sameSite.noneRequiresSecure", true); // [DEFAULT FF131+]
@@ -275,7 +281,7 @@ user_pref("security.OCSP.enabled", 0);
 // [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); // [DEFAULT: true FF137+]
-user_pref("security.pki.crlite_mode", 2);
+//user_pref("security.pki.crlite_mode", 2); // [DEFAULT: 2 FF142+]
 
 // PREF: HTTP Public Key Pinning (HPKP)
 // HPKP enhances the security of SSL certificates by associating
@@ -314,6 +320,13 @@ user_pref("security.pki.crlite_mode", 2);
 //user_pref("browser.contentanalysis.enabled", false); // [FF121+] [DEFAULT]
 //user_pref("browser.contentanalysis.default_result", 0; // [FF127+] [DEFAULT]
 
+// PREF: disable referrer and storage access for resources injected by content scripts [FF139+]
+//user_pref("privacy.antitracking.isolateContentScriptResources", true);
+
+// PREF: disable CSP Level 2 Reporting [FF140+]
+// [1] https://github.com/yokoffing/Betterfox/issues/415
+user_pref("security.csp.reporting.enabled", false);
+
 /****************************************************************************
  * SECTION: SSL (Secure Sockets Layer) / TLS (Transport Layer Security)    *
 ****************************************************************************/
@@ -484,6 +497,14 @@ user_pref("browser.sessionstore.interval", 60000); // 1 minute; default=15000 (1
 // PREF: purge session icon in Private Browsing windows
 user_pref("browser.privatebrowsing.resetPBM.enabled", true);
 
+// PREF: delete files downloaded in Private Browsing when all private windows are closed
+// When downloading a file in private browsing mode, the user will be prompted
+// to chose whether they want to keep or delete files that are downloaded
+// while in private browsing. 
+//user_pref("browser.download.enableDeletePrivate", true);
+//user_pref("browser.download.deletePrivateChosen", true);
+//user_pref("browser.download.deletePrivate", true);
+
 /******************************************************************************
  * SECTION: SHUTDOWN & SANITIZING                                             *
 ******************************************************************************/
@@ -580,11 +601,13 @@ user_pref("browser.search.separatePrivateDefault.ui.enabled", true);
     //user_pref("browser.search.separatePrivateDefault", true); // DEFAULT
 
 // PREF: enable option to add custom search engine
+// Before FF140, this pref was hidden.
 // [SETTINGS] Settings -> Search -> Search Shortcuts -> Add
 // [EXAMPLE] https://search.brave.com/search?q=%s
 // [EXAMPLE] https://lite.duckduckgo.com/lite/?q=%s
 // [1] https://reddit.com/r/firefox/comments/xkzswb/adding_firefox_search_engine_manually/
-user_pref("browser.urlbar.update2.engineAliasRefresh", true); // HIDDEN
+// [2] https://www.mozilla.org/en-US/firefox/140.0/releasenotes/
+//user_pref("browser.urlbar.update2.engineAliasRefresh", true); // [DEFAULT FF140+]
 
 // PREF: disable live search suggestions (Google, Bing, etc.)
 // [WARNING] Search engines keylog every character you type from the URL bar.
@@ -660,6 +683,7 @@ user_pref("network.IDN_show_punycode", true);
 // [4] https://web.dev/why-https-matters/
 // [5] https://www.cloudflare.com/learning/ssl/why-use-https/
 // [6] https://blog.chromium.org/2023/08/towards-https-by-default.html
+// [7] https://attackanddefense.dev/2025/03/31/https-first-in-firefox-136.html
 //user_pref("dom.security.https_first", true); // [DEFAULT FF136+]
 //user_pref("dom.security.https_first_pbm", true); // [DEFAULT FF91+]
 //user_pref("dom.security.https_first_schemeless", true); // [FF120+] [DEFAULT FF129+]
@@ -887,10 +911,11 @@ user_pref("signon.privateBrowsingCapture.enabled", false);
 
 // PREF: limit (or disable) HTTP authentication credentials dialogs triggered by sub-resources [FF41+]
 // Hardens against potential credentials phishing.
+// [WARNING] Hardening this pref may prevent you from subscribing to SoGo calendars in Thunderbird 138
 // 0=don't allow sub-resources to open HTTP authentication credentials dialogs
 // 1=don't allow cross-origin sub-resources to open HTTP authentication credentials dialogs
 // 2=allow sub-resources to open HTTP authentication credentials dialogs (default)
-// [1] https://www.fxsitecompat.com/en-CA/docs/2015/http-auth-dialog-can-no-longer-be-triggered-by-cross-origin-resources/
+// [1] https://web.archive.org/web/20181123134351/https://www.fxsitecompat.com/en-CA/docs/2015/http-auth-dialog-can-no-longer-be-triggered-by-cross-origin-resources/
 user_pref("network.auth.subresource-http-auth-allow", 1);
 
 // PREF: prevent password truncation when submitting form data
@@ -973,9 +998,9 @@ user_pref("extensions.enabledScopes", 5); // [HIDDEN PREF]
 // Users may see a notification when running add-ons that are not monitored by Mozilla when they visit certain sites.
 // The notification informs them that “some extensions are not allowed” and were blocked from running on that site.
 // There's no details as to which sites are affected.
-// [1] https://support.mozilla.org/en-US/kb/quarantined-domains
+// [1] https://support.mozilla.org/kb/quarantined-domains
 // [2] https://www.ghacks.net/2023/07/04/firefox-115-new-esr-base-and-some-add-ons-may-be-blocked-from-running-on-certain-sites/
-//user_pref("extensions.quarantinedDomains.enabled", false);
+//user_pref("extensions.quarantinedDomains.enabled", true); // [DEFAULT: true]
 
 /******************************************************************************
  * SECTION: HEADERS / REFERERS                                               *
@@ -1113,6 +1138,53 @@ user_pref("privacy.userContext.ui.enabled", true);
     // Optionally, hide the setting which also disables the DRM prompt:
     //user_pref("browser.eme.ui.enabled", false);
 
+/******************************************************************************
+ * SECTION: JIT                                                              *
+******************************************************************************/
+// PREF: Just-In-Time Compilation
+// Around half of zero-day exploits are directly related to "just in time"
+// (JIT) compilers, and disabling that can greatly improve your protection against
+// these potential exploits.
+// [1] https://microsoftedge.github.io/edgevr/posts/Super-Duper-Secure-Mode/
+// [2] https://www.youtube.com/watch?v=i7qlZeDt9o4
+
+// PREF: JavaScript JIT
+// PREF: disable Ion and baseline JIT to harden against JS exploits
+// [NOTE] When both Ion and JIT are disabled, and trustedprincipals
+// is enabled, then Ion can still be used by extensions [4].
+// Tor Browser doesn't even ship with these disabled by default.
+// [1] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=firefox+jit
+// [2] https://microsoftedge.github.io/edgevr/posts/Super-Duper-Secure-Mode/
+// [3] https://support.microsoft.com/en-us/microsoft-edge/enhance-your-security-on-the-web-with-microsoft-edge-b8199f13-b21b-4a08-a806-daed31a1929d
+// [4] https://bugzilla.mozilla.org/show_bug.cgi?id=1599226
+// [5] https://wiki.mozilla.org/IonMonkey
+// [6] https://github.com/arkenfox/user.js/issues/1791#issuecomment-1891273681
+//user_pref("javascript.options.baselinejit", false);
+//user_pref("javascript.options.ion", false);
+//user_pref("javascript.options.jit_trustedprincipals", false);
+
+// PREF: WebAssembly JIT [FF52+]
+// Vulnerabilities [1] have increasingly been found, including those known and fixed
+// in native programs years ago [2]. WASM has powerful low-level access, making
+// certain attacks (brute-force) and vulnerabilities more possible.
+// [STATS] ~0.2% of websites, about half of which are for cryptomining / malvertising [2][3]
+// [1] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=wasm
+// [2] https://spectrum.ieee.org/tech-talk/telecom/security/more-worries-over-the-security-of-web-assembly
+// [3] https://www.zdnet.com/article/half-of-the-websites-using-webassembly-use-it-for-malicious-purposes
+//user_pref("javascript.options.wasm", false);
+    //user_pref("javascript.options.wasm_trustedprincipals", false);
+    //user_pref("javascript.options.wasm_baselinejit", false);
+    //user_pref("javascript.options.wasm_optimizingjit", false);
+
+// PREF: Asm.js JIT [FF22+]
+// [1] http://asmjs.org/
+// [2] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=asm.js
+// [3] https://rh0dev.github.io/blog/2017/the-return-of-the-jit/
+//user_pref("javascript.options.asmjs", false);
+
+// PREF: Blinterp (JIT-like)
+//user_pref("javascript.options.blinterp", false);
+     
 /******************************************************************************
  * SECTION: VARIOUS                                                          *
 ******************************************************************************/
@@ -1126,39 +1198,6 @@ user_pref("privacy.userContext.ui.enabled", true);
 // If this is less than 5, then pasting code into the web console is disabled.
 //user_pref("devtools.selfxss.count", 5);
 
-// PREF: disable asm.js [FF22+]
-// [WARNING] Disabling this pref may disrupt your browsing experience.
-// [1] http://asmjs.org/
-// [2] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=asm.js
-// [3] https://rh0dev.github.io/blog/2017/the-return-of-the-jit/
-//user_pref("javascript.options.asmjs", false);
-
-// PREF: disable Ion and baseline JIT to harden against JS exploits
-// [NOTE] When both Ion and JIT are disabled, and trustedprincipals
-// is enabled, then Ion can still be used by extensions [4].
-// [WARNING] Disabling these prefs will disrupt your browsing experience [6].
-// Tor Browser doesn't even ship with these disabled by default.
-// [1] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=firefox+jit
-// [2] https://microsoftedge.github.io/edgevr/posts/Super-Duper-Secure-Mode/
-// [3] https://support.microsoft.com/en-us/microsoft-edge/enhance-your-security-on-the-web-with-microsoft-edge-b8199f13-b21b-4a08-a806-daed31a1929d
-// [4] https://bugzilla.mozilla.org/show_bug.cgi?id=1599226
-// [5] https://wiki.mozilla.org/IonMonkey
-// [6] https://github.com/arkenfox/user.js/issues/1791#issuecomment-1891273681
-//user_pref("javascript.options.ion", false);
-//user_pref("javascript.options.baselinejit", false);
-//user_pref("javascript.options.jit_trustedprincipals", true); // [FF75+] [HIDDEN PREF]
-
-// PREF: disable WebAssembly [FF52+]
-// [WARNING] Disabling this pref may disrupt your browsing experience.
-// Vulnerabilities [1] have increasingly been found, including those known and fixed
-// in native programs years ago [2]. WASM has powerful low-level access, making
-// certain attacks (brute-force) and vulnerabilities more possible.
-// [STATS] ~0.2% of websites, about half of which are for cryptomining / malvertising [2][3]
-// [1] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=wasm
-// [2] https://spectrum.ieee.org/tech-talk/telecom/security/more-worries-over-the-security-of-web-assembly
-// [3] https://www.zdnet.com/article/half-of-the-websites-using-webassembly-use-it-for-malicious-purposes
-//user_pref("javascript.options.wasm", false);
-
  /******************************************************************************
  * SECTION: SAFE BROWSING (SB)                                               *
 ******************************************************************************/
@@ -1269,6 +1308,8 @@ user_pref("browser.safebrowsing.downloads.remote.enabled", false);
 // To add site exceptions: Page Info>Permissions>Receive Notifications
 // To manage site exceptions: Options>Privacy & Security>Permissions>Notifications>Settings
 // 0=always ask (default), 1=allow, 2=block
+// [1] https://easylinuxtipsproject.blogspot.com/p/security.html#ID5
+// [2] https://github.com/yokoffing/Betterfox/wiki/Common-Overrides#site-notifications
 user_pref("permissions.default.desktop-notification", 2);
    
 // PREF: default permission for Location Requests
@@ -1322,6 +1363,10 @@ user_pref("permissions.manager.defaultsUrl", "");
 // PREF: remove webchannel whitelist
 //user_pref("webchannel.allowObject.urlWhitelist", ""); // [DEFAULT FF132+]
 
+// PREF: disable metadata caching for installed add-ons by default
+// [1] https://blog.mozilla.org/addons/how-to-opt-out-of-add-on-metadata-updates/
+user_pref("extensions.getAddons.cache.enabled", false);
+
 /******************************************************************************
  * SECTION: TELEMETRY                                                   *
 ******************************************************************************/
@@ -1363,8 +1408,7 @@ user_pref("browser.newtabpage.activity-stream.feeds.telemetry", false);
 user_pref("browser.newtabpage.activity-stream.telemetry", false);
 
 // PREF: disable daily active users [FF136+]
-// [NOTE] Already disabled by main telemetry switch
+user_pref("datareporting.usage.uploadEnabled", false);
-//user_pref("datareporting.usage.uploadEnabled", false);
 
 /******************************************************************************
  * SECTION: EXPERIMENTS                                                      *
@@ -1398,15 +1442,16 @@ user_pref("browser.tabs.crashReporting.sendReport", false);
 ******************************************************************************/
 
 // PREF: disable Captive Portal detection
+// [WARNING] Do NOT use for mobile devices. May NOT be able to use Firefox on public wifi (hotels, coffee shops, etc).
 // [1] https://www.eff.org/deeplinks/2017/08/how-captive-portals-interfere-wireless-security-and-privacy
 // [2] https://wiki.mozilla.org/Necko/CaptivePortal
-user_pref("captivedetect.canonicalURL", "");
+//user_pref("captivedetect.canonicalURL", "");
-user_pref("network.captive-portal-service.enabled", false);
+//user_pref("network.captive-portal-service.enabled", false);
 
 // PREF: disable Network Connectivity checks
 // [WARNING] Do NOT use for mobile devices. May NOT be able to use Firefox on public wifi (hotels, coffee shops, etc).
 // [1] https://bugzilla.mozilla.org/1460537
-user_pref("network.connectivity-service.enabled", false);
+//user_pref("network.connectivity-service.enabled", false);
 
 // PREF: disable Privacy-Preserving Attribution [FF128+]
 // [NOTE] PPA disabled if main telemetry switches are disabled.

install.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
 from datetime import datetime
 from os import name, getenv
 from json import loads
@@ -43,23 +45,51 @@ If there's any problems with the script, feel free to mention @Denperidge on Git
 re_find_version = compile(r"mozilla.org/.*?/firefox/(?P<version>[\d.]*?)/", IGNORECASE)
 re_find_overrides = r"(overrides|prefs).*\n(?P<space>\n)"
 
-FIREFOX_ROOT = Path.home().joinpath(".mozilla/firefox").absolute() if name != "nt" else Path(getenv("APPDATA") + "/Mozilla/Firefox/").resolve()
+INSTALLATIONS_TO_CHECK = [
-DEFAULT_FIREFOX_INSTALL = Path("C:/Program Files/Mozilla Firefox/" if name == "nt" else "")
+    # windows
-
+    {
-selected_if_backup = None
+        "command": [str(Path("C:/Program Files/Mozilla Firefox/firefox"))],
-selected_config = ""
+        "root": Path(getenv("APPDATA") or "").joinpath("Mozilla/Firefox").resolve(),
-userjs_path = None
+    },
+    {
+        "command": [str(Path(getenv("LOCALAPPDATA") or "").joinpath("Mozilla Firefox/firefox").resolve())],
+        "root": Path(getenv("APPDATA") or "").joinpath("Mozilla/Firefox").resolve(),
+    },
+    # linux
+    {
+        "command": ["firefox"],
+        "root": Path.home().joinpath(".mozilla/firefox").absolute(),
+    },
+    # flatpak
+    {
+        "command": ["flatpak", "run", "org.mozilla.firefox"],
+        "root": Path.home().joinpath(".var/app/org.mozilla.firefox/.mozilla/firefox").absolute(),
+    },
+]
 
 
-def _get_firefox_version(bin="firefox"):
+# command is a list, eg. ["firefox"] or ["flatpak", "run", "org.mozilla.firefox"]
-    try:
+def _get_firefox_version(command):
-        ver_string = check_output([bin, "--version"], encoding="UTF-8")
+    ver_string = check_output(command + ["--version"], encoding="UTF-8")
     return ver_string[ver_string.rindex(" ")+1:].strip()
-    except FileNotFoundError:
-        return _get_firefox_version(str(DEFAULT_FIREFOX_INSTALL.joinpath("firefox")))
 
-def _get_default_profile_folder():
+def _get_default_firefox_version_and_root():
-    config_path = FIREFOX_ROOT.joinpath("profiles.ini")
+    print("Searching for Firefox installation...")
+    for installation in INSTALLATIONS_TO_CHECK:
+        try:
+            print(f"  '{' '.join(installation['command'])}': ", end="")
+            version = _get_firefox_version(installation["command"])
+            print("YES")
+            print(f"Root: {installation['root']}")
+            return version, installation["root"]
+        except Exception:
+            print("no")
+            continue
+    
+    raise Exception("Firefox binary not found. Please ensure Firefox is installed and the path is correct.")
+
+def _get_default_profile_folder(firefox_root):
+    config_path = firefox_root.joinpath("profiles.ini")
     
     print(f"Reading {config_path}...")
 
@@ -82,7 +112,7 @@ def _get_default_profile_folder():
                 break
     
     if path is not None:
-        return FIREFOX_ROOT.joinpath(path)
+        return firefox_root.joinpath(path)
     else:
         raise Exception("Could not determine default Firefox profile! Exiting...")
 
@@ -123,16 +153,6 @@ def _get_latest_compatible_release(releases):
         if firefox_version in release["supported"]:
             return release
     return None
-def _get_firefox_version(bin="firefox"):
-    try:
-        ver_string = check_output([bin, "--version"], encoding="UTF-8")
-        return ver_string[ver_string.rindex(" ")+1:].strip()
-    except FileNotFoundError:
-        default_path = str(DEFAULT_FIREFOX_INSTALL.joinpath("firefox"))
-        if bin != default_path:  # Avoid infinite recursion
-            return _get_firefox_version(default_path)
-        else:
-            raise Exception("Firefox binary not found. Please ensure Firefox is installed and the path is correct.")    
 
 def backup_profile(src):
     dest = f"{src}-backup-{datetime.today().strftime('%Y-%m-%d-%H-%M-%S')}"
@@ -150,6 +170,8 @@ def extract_betterfox(data, profile_folder):
     zipfile = ZipFile(data)
     userjs_zipinfo = None
     for file in zipfile.filelist:
+        if "/zen/" in file.filename and not args.zen:
+            continue
         if file.filename.endswith("user.js"):
             userjs_zipinfo = file
             userjs_zipinfo.filename = Path(userjs_zipinfo.filename).name
@@ -176,16 +198,20 @@ def list_releases(releases, only_supported=False, add_index=False):
             print(f"{f'[{i}]' if add_index else ''}{'> ' if supported else '  '}{release['name'].ljust(20)}\t\t\tSupported: {','.join(release['supported'])}")
         i+=1
 
+def _press_enter_to_exit(args):
+    if not args.no_wait_for_exit:
+        input("Press ENTER to exit...")
 
 if __name__ == "__main__":
-    firefox_version = _get_firefox_version()
+    firefox_version, firefox_root = _get_default_firefox_version_and_root()
-    selected_release = None
+
+    default_profile_folder = _get_default_profile_folder(firefox_root)
 
-    default_profile_folder = _get_default_profile_folder()
     argparser = ArgumentParser(
 
     )
     argparser.add_argument("--overrides", "-o", default=default_profile_folder.joinpath("user-overrides.js"), help="if the provided file exists, add overrides to user.js. Defaults to " + str(default_profile_folder.joinpath("user-overrides.js"))),
+    argparser.add_argument("--zen", "-z", action="store_true", default=False, help="Install user.js for the Zen browser instead. Defaults to False"),
     
     
     advanced = argparser.add_argument_group("Advanced")
@@ -203,14 +229,17 @@ if __name__ == "__main__":
     modes.add_argument("--list-all", action="store_true", default=False, help=f"List all Betterfox releases")
     modes.add_argument("--interactive", "-i", action="store_true", default=False, help=f"Interactively select Betterfox version")
 
+    behaviour = argparser.add_argument_group("Script behaviour")
+    behaviour.add_argument("--no-wait-for-exit", "-nwfe", action="store_true", default=False, help="Disable 'Press ENTER to exit...' and exit immediately"),
+
     args = argparser.parse_args()
 
     releases = _get_releases(args.repository_owner, args.repository_name)
-
+    selected_release = None
 
     if args.list or args.list_all:
         list_releases(releases, args.list)
-        input("Press ENTER to exit...")
+        _press_enter_to_exit(args)
         exit()
 
     if not args.no_backup:
@@ -261,5 +290,5 @@ if __name__ == "__main__":
         else:
             print(f"Found no overrides in {args.overrides}")
 
-    input("Press ENTER to exit...")
+    _press_enter_to_exit(args)
 

personal/user-overrides.js

@@ -19,10 +19,19 @@
 
 /** FASTFOX ***/
 user_pref("browser.sessionstore.restore_pinned_tabs_on_demand", true);
-user_pref("browser.sessionhistory.max_total_viewers", 4); // only remember # of pages in Back-Forward cache
+
+// SPECULATIVE LOADING WITHOUT PREDICTOR
+user_pref("network.http.speculative-parallel-limit", 20);
+//user_pref("network.dns.disablePrefetch", false);
+//user_pref("network.dns.disablePrefetchFromHTTPS", false);
+//user_pref("dom.prefetch_dns_for_anchor_https_document", true); 
+user_pref("browser.urlbar.speculativeConnect.enabled", true);
+user_pref("browser.places.speculativeConnect.enabled", true);
+user_pref("network.prefetch-next", true);
 user_pref("network.http.max-persistent-connections-per-server", 20); // increase download connections
 
 /** SECUREFOX ***/
+user_pref("privacy.trackingprotection.allow_list.convenience.enabled", false); // disable Strict allowlist of convenience features
 user_pref("signon.rememberSignons", false); // disable password manager
 user_pref("extensions.formautofill.addresses.enabled", false); // disable address manager
 user_pref("extensions.formautofill.creditCards.enabled", false); // disable credit card manager
@@ -45,6 +54,12 @@ user_pref("identity.fxaccounts.enabled", false); // disable Firefox Sync
 user_pref("browser.firefox-view.feature-tour", "{\"screen\":\"\",\"complete\":true}"); // disable the Firefox View tour from popping up for new profiles
 user_pref("accessibility.force_disabled", 1); // disable Accessibility features
 user_pref("security.cert_pinning.enforcement_level", 2); // strict public key pinning
+user_pref("captivedetect.canonicalURL", ""); // disable captive portal detection
+user_pref("network.captive-portal-service.enabled", false); // disable captive portal detection
+user_pref("network.connectivity-service.enabled", false); // disable captive portal detection
+user_pref("browser.download.enableDeletePrivate", true); // Delete files downloaded in private browsing when all private windows are closed
+user_pref("browser.download.deletePrivateChosen", true); // Delete files downloaded in private browsing when all private windows are closed
+user_pref("browser.download.deletePrivate", true); // Delete files downloaded in private browsing when all private windows are closed
 
 /** PESKYFOX ***/
 user_pref("devtools.accessibility.enabled", false); // removes un-needed "Inspect Accessibility Properties" on right-click
@@ -138,3 +153,5 @@ user_pref("network.trr.mode", 2); // enable TRR (with System fallback)
 user_pref("network.trr.max-fails", 5); // lower max attempts to use DoH
 user_pref("geo.provider.use_geoclue", false); // [LINUX]
 user_pref("pdfjs.defaultZoomValue", "page-width"); // PDF zoom level
+
+

user.js

@@ -10,7 +10,7 @@
 /****************************************************************************
  * Betterfox                                                                *
  * "Ad meliora"                                                             *
- * version: 137                                                             *
+ * version: 144                                                             *
  * url: https://github.com/yokoffing/Betterfox                              *
 ****************************************************************************/
 
@@ -18,46 +18,57 @@
  * SECTION: FASTFOX                                                         *
 ****************************************************************************/
 /** GENERAL ***/
-user_pref("content.notify.interval", 100000);
+user_pref("gfx.content.skia-font-cache-size", 32);
 
 /** GFX ***/
-user_pref("gfx.canvas.accelerated.cache-size", 512);
+user_pref("gfx.canvas.accelerated.cache-items", 32768);
-user_pref("gfx.content.skia-font-cache-size", 20);
+user_pref("gfx.canvas.accelerated.cache-size", 4096);
+user_pref("webgl.max-size", 16384);
 
 /** DISK CACHE ***/
 user_pref("browser.cache.disk.enable", false);
 
+/** MEMORY CACHE ***/
+user_pref("browser.cache.memory.capacity", 131072);
+user_pref("browser.cache.memory.max_entry_size", 20480);
+user_pref("browser.sessionhistory.max_total_viewers", 4);
+user_pref("browser.sessionstore.max_tabs_undo", 10);
+
 /** MEDIA CACHE ***/
-user_pref("media.memory_cache_max_size", 65536);
+user_pref("media.memory_cache_max_size", 262144);
-user_pref("media.cache_readahead_limit", 7200);
+user_pref("media.memory_caches_combined_limit_kb", 1048576);
-user_pref("media.cache_resume_threshold", 3600);
+user_pref("media.cache_readahead_limit", 600);
+user_pref("media.cache_resume_threshold", 300);
 
 /** IMAGE CACHE ***/
-user_pref("image.mem.decode_bytes_at_a_time", 32768);
+user_pref("image.cache.size", 10485760);
+user_pref("image.mem.decode_bytes_at_a_time", 65536);
 
 /** NETWORK ***/
 user_pref("network.http.max-connections", 1800);
 user_pref("network.http.max-persistent-connections-per-server", 10);
 user_pref("network.http.max-urgent-start-excessive-connections-per-host", 5);
+user_pref("network.http.request.max-start-delay", 5);
 user_pref("network.http.pacing.requests.enabled", false);
+user_pref("network.dnsCacheEntries", 10000);
 user_pref("network.dnsCacheExpiration", 3600);
 user_pref("network.ssl_tokens_cache_capacity", 10240);
 
 /** SPECULATIVE LOADING ***/
+user_pref("network.http.speculative-parallel-limit", 0);
 user_pref("network.dns.disablePrefetch", true);
 user_pref("network.dns.disablePrefetchFromHTTPS", true);
+user_pref("browser.urlbar.speculativeConnect.enabled", false);
+user_pref("browser.places.speculativeConnect.enabled", false);
 user_pref("network.prefetch-next", false);
 user_pref("network.predictor.enabled", false);
-user_pref("network.predictor.enable-prefetch", false);
-
-/** EXPERIMENTAL ***/
-user_pref("layout.css.grid-template-masonry-value.enabled", true);
 
 /****************************************************************************
  * SECTION: SECUREFOX                                                       *
 ****************************************************************************/
 /** TRACKING PROTECTION ***/
 user_pref("browser.contentblocking.category", "strict");
+user_pref("privacy.trackingprotection.allow_list.baseline.enabled", true);
 user_pref("browser.download.start_downloads_in_tmp_dir", true);
 user_pref("browser.helperApps.deleteTempFileOnExit", true);
 user_pref("browser.uitour.enabled", false);
@@ -65,7 +76,7 @@ user_pref("privacy.globalprivacycontrol.enabled", true);
 
 /** OCSP & CERTS / HPKP ***/
 user_pref("security.OCSP.enabled", 0);
-user_pref("security.pki.crlite_mode", 2);
+user_pref("security.csp.reporting.enabled", false);
 
 /** SSL / TLS ***/
 user_pref("security.ssl.treat_unsafe_negotiation_as_broken", true);
@@ -77,14 +88,13 @@ user_pref("browser.privatebrowsing.forceMediaMemoryCache", true);
 user_pref("browser.sessionstore.interval", 60000);
 
 /** SHUTDOWN & SANITIZING ***/
-user_pref("browser.privatebrowsing.resetPBM.enabled", true);
 user_pref("privacy.history.custom", true);
+user_pref("browser.privatebrowsing.resetPBM.enabled", true);
 
 /** SEARCH / URL BAR ***/
 user_pref("browser.urlbar.trimHttps", true);
 user_pref("browser.urlbar.untrimOnUserInteraction.featureGate", true);
 user_pref("browser.search.separatePrivateDefault.ui.enabled", true);
-user_pref("browser.urlbar.update2.engineAliasRefresh", true);
 user_pref("browser.search.suggest.enabled", false);
 user_pref("browser.urlbar.quicksuggest.enabled", false);
 user_pref("browser.urlbar.groupLabels.enabled", false);
@@ -119,6 +129,7 @@ user_pref("permissions.default.geo", 2);
 user_pref("geo.provider.network.url", "https://beacondb.net/v1/geolocate");
 user_pref("browser.search.update", false);
 user_pref("permissions.manager.defaultsUrl", "");
+user_pref("extensions.getAddons.cache.enabled", false);
 
 /** TELEMETRY ***/
 user_pref("datareporting.policy.dataSubmissionEnabled", false);
@@ -137,6 +148,7 @@ user_pref("toolkit.coverage.opt-out", true);
 user_pref("toolkit.coverage.endpoint.base", "");
 user_pref("browser.newtabpage.activity-stream.feeds.telemetry", false);
 user_pref("browser.newtabpage.activity-stream.telemetry", false);
+user_pref("datareporting.usage.uploadEnabled", false);
 
 /** EXPERIMENTS ***/
 user_pref("app.shield.optoutstudies.enabled", false);
@@ -147,11 +159,6 @@ user_pref("app.normandy.api_url", "");
 user_pref("breakpad.reportURL", "");
 user_pref("browser.tabs.crashReporting.sendReport", false);
 
-/** DETECTION ***/
-user_pref("captivedetect.canonicalURL", "");
-user_pref("network.captive-portal-service.enabled", false);
-user_pref("network.connectivity-service.enabled", false);
-
 /****************************************************************************
  * SECTION: PESKYFOX                                                        *
 ****************************************************************************/
@@ -173,24 +180,27 @@ user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true);
 user_pref("browser.compactmode.show", true);
 user_pref("browser.privateWindowSeparation.enabled", false); // WINDOWS
 
+/** AI ***/
+user_pref("browser.ml.enable", false);
+user_pref("browser.ml.chat.enabled", false);
+user_pref("browser.ml.chat.menu", false);
+user_pref("browser.tabs.groups.smart.enabled", false);
+user_pref("browser.ml.linkPreview.enabled", false);
+
 /** FULLSCREEN NOTICE ***/
 user_pref("full-screen-api.transition-duration.enter", "0 0");
 user_pref("full-screen-api.transition-duration.leave", "0 0");
 user_pref("full-screen-api.warning.timeout", 0);
 
 /** URL BAR ***/
-user_pref("browser.urlbar.unitConversion.enabled", true);
 user_pref("browser.urlbar.trending.featureGate", false);
-user_pref("dom.text_fragments.create_text_fragment.enabled", true);
 
 /** NEW TAB PAGE ***/
 user_pref("browser.newtabpage.activity-stream.default.sites", "");
 user_pref("browser.newtabpage.activity-stream.showSponsoredTopSites", false);
 user_pref("browser.newtabpage.activity-stream.feeds.section.topstories", false);
 user_pref("browser.newtabpage.activity-stream.showSponsored", false);
-
+user_pref("browser.newtabpage.activity-stream.showSponsoredCheckboxes", false);
-/** POCKET ***/
-user_pref("extensions.pocket.enabled", false);
 
 /** DOWNLOADS ***/
 user_pref("browser.download.manager.addToRecentDocs", false);

zen/user.js

@@ -10,7 +10,7 @@
 /****************************************************************************
  * BetterZen                                                                *
  * "Ex nihilo nihil fit"                                                    *
- * version: 137                                                             *
+ * version: 142                                                             *
  * url: https://github.com/yokoffing/Betterfox                              *
 ****************************************************************************/
 
@@ -18,7 +18,6 @@
  * SECTION: FASTFOX                                                         *
 ****************************************************************************/
 /** GFX ***/
-user_pref("gfx.canvas.accelerated.cache-items", 8192); // DEFAULT FF135+
 user_pref("gfx.canvas.accelerated.cache-size", 512);
 
 /** DISK CACHE ***/
@@ -39,6 +38,8 @@ user_pref("network.predictor.enable-prefetch", false);
 ****************************************************************************/
 /** TRACKING PROTECTION ***/
 user_pref("browser.contentblocking.category", "strict");
+user_pref("privacy.trackingprotection.allow_list.baseline.enabled", true);
+user_pref("privacy.trackingprotection.allow_list.convenience.enabled", true);
 user_pref("browser.download.start_downloads_in_tmp_dir", true);
 
 /** OCSP & CERTS / HPKP ***/
@@ -91,10 +92,6 @@ user_pref("dom.text_fragments.create_text_fragment.enabled", true);
 ****************************************************************************/
 // Remove the slashes to enable the prefs
 
-// PREF: reduce CPU and GPU use until bug is fixed
-// [1] https://github.com/zen-browser/desktop/issues/6302
-user_pref("zen.view.experimental-rounded-view", false);
-
 // PREF: re-enable Windows efficiency mode
 //user_pref("dom.ipc.processPriorityManager.backgroundUsesEcoQoS", true);
 
@@ -105,6 +102,9 @@ user_pref("zen.view.experimental-rounded-view", false);
 // Currently bugged if you click to view what's blocked
 //user_pref("zen.urlbar.show-protections-icon", true);
 
+// PREF: Disable the Picture in picture pop-out when changing tabs
+//user_pref("media.videocontrols.picture-in-picture.enable-when-switching-tabs.enabled", false);
+
 /****************************************************************************
  * START: MY OVERRIDES                                                      *
 ****************************************************************************/