138.0 (#392 )

SoGo calendar integration issues
Improve install.py (#373 )
2026-06-12 15:40:48 +05:30 · 2025-06-02 00:45:46 -04:00 · 2025-05-14 21:15:43 -04:00 · 2025-04-28 10:06:35 -04:00 · 2025-04-16 12:21:48 -04:00 · 2025-04-16 12:08:16 -04:00
12 changed files with 1059 additions and 610 deletions
@@ -1,43 +0,0 @@
---
-name: Something is not working!
-about: Use this form if you have an issue.
-title: ''
-labels: ''
-assignees: yokoffing
-
---
-
-## BEFORE YOU BEGIN
-I have attempted the following troubleshooting suggestions:
- [ ] The issue persists when using Firefox in [Troubleshoot Mode](https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode).
- [ ] Disabled DNS-level content blocking (AdGuard Home, NextDNS, Control D, RethinkDNS, PiHole, etc), [cleared my DNS cache](https://www.pcmag.com/how-to/how-to-flush-your-dns-cache), and used my ISP's DNS resolver (if applicable).
- [ ] [Cleared website data](https://support.mozilla.org/en-US/kb/clear-cookies-and-site-data-firefox), restarted Firefox, and my issue persists.
- [ ] I have created a [new profile](https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles). The issue persists when using the current [user.js](https://github.com/yokoffing/Betterfox/blob/master/user.js) file on GitHub. (Must be in a new profile and a new user.js!)
-
-## REPORT
-**Describe the bug**
-*A clear and concise description of what the bug is.*
-
-**To Reproduce**
-*Steps to reproduce the behavior:*
-
-```
-1. Go to '...'
-2. Click on '....'
-3. Scroll down to '....'
-4. See error
-```
-
-**Expected behavior**
-*A clear and concise description of what you expected to happen.*
-
-**Screenshots**
-*If applicable, add screenshots to help explain your problem.*
-
-**Desktop (please complete the following information):**
- - OS:
- - Browser:
- - Version:
-
-**Additional context**
-*Add any other context about the problem here.*
@@ -0,0 +1,105 @@
+name: Bug Report
+description: File a bug report
+assignees: yokoffing
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+       Please confirm the issue relates to Betterfox user.js before submitting a report.
+
+        To troubleshoot your installation, try solutions below and test the issue after each step:
+        * Launch Firefox in [Troubleshoot Mode](https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode).
+        * Disable DNS-level content blocking (such ad AdGuard Home, NextDNS, Control D, PiHole, etc) and [clear the DNS cache](https://www.pcmag.com/how-to/how-to-flush-your-dns-cache) and use ISP's DNS resolver (if applicable).
+        * [Clear website data](https://support.mozilla.org/en-US/kb/clear-cookies-and-site-data-firefox) and restart Firefox.
+        * Create a [new clean profile](https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles).
+
+  - type: checkboxes
+    attributes:
+      label: Prerequisites
+      options:
+        - label: The issue persists when using Firefox in Troubleshoot Mode.
+          required: true
+        - label: "The issue persists after I disabled DNS-level content blocking (PiHole, NextDNS, etc.), cleared DNS cache, and tried to use ISP's DNS resolver (if applicable)."
+          required: true
+        - label: The issue persists after I cleared website data and restarted Firefox.
+          required: true
+        - label: I have created a new, clean profile. The issue persists after adding the user.js, but it is not reproducible in a new, unedited Firefox profile.
+          required: true
+
+  - type: textarea
+    attributes:
+      label: Bug description
+      description: Describe the issue.
+      placeholder: A bug causes this and that...
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Steps to reproduce
+      description: Explain the steps required to reproduce the issue.
+      placeholder: |
+        1. Go to `...`
+        2. Click on `...`
+        3. Scroll down to `...`
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Expected behavior
+      description: What did you expect to happen instead?
+      placeholder: Firefox should do [this]. Instead, it did [that].
+    validations:
+      required: false
+
+  - type: textarea
+    attributes:
+      label: Screenshots
+      description: Add screenshots to help explain your problem (optional).
+    validations:
+      required: false
+
+  - type: dropdown
+    attributes:
+      label: Operating System (OS)
+      options:
+        - Windows (10 or later)
+        - macOS (ARM-based device)
+        - macOS (Intel-based device)
+        - Linux
+        - Other
+    validations:
+      required: true
+
+  - type: dropdown
+    attributes:
+      label: Browser
+      options:
+        - Firefox
+        - Firefox Beta
+        - Firefox Developer Edition
+        - Firefox Nightly
+        - Firefox ESR
+        - Floorp
+        - LibreWolf
+        - Zen Browser
+        - Waterfox
+        - Other
+    validations:
+      required: true
+
+  - type: input
+    attributes:
+      label: Version
+      placeholder: 136 stable
+    validations:
+      required: false
+
+  - type: textarea
+    attributes:
+      label: Additional information
+      description: Include any other information that may be helpful.
+    validations:
+      required: false
@@ -3,7 +3,7 @@
 * Fastfox                                                                              *
 * "Non ducor duco"                                                                     *
 * priority: speedy browsing                                                            *
- * version: 126                                                                         *
+ * version: 137                                                                         *
 * url: https://github.com/yokoffing/Betterfox                                          *
 ***************************************************************************************/

@@ -45,8 +45,8 @@
 // to impact page load performance.
 // [EXAMPLE] 100000 = .10s = 100 reflows/second
 // [1] https://searchfox.org/mozilla-central/rev/c1180ea13e73eb985a49b15c0d90e977a1aa919c/modules/libpref/init/StaticPrefList.yaml#1824-1834
-// [2] https://dev.opera.com/articles/efficient-javascript/?page=3#reflow
-// [3] https://dev.opera.com/articles/efficient-javascript/?page=3#smoothspeed
+// [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)

 // PREF: new tab preload
@@ -98,25 +98,19 @@ user_pref("content.notify.interval", 100000); // (.10s); default=120000 (.12s)
 //user_pref("gfx.webrender.software", true); // Software Webrender uses CPU instead of GPU
    //user_pref("gfx.webrender.software.opengl", true); // LINUX

-// PREF: NVIDIA RTX Video Super Resolution and RTX Video HDR [WINDOWS] [FF125+]
-// Super Resolution activiates on video content 720p or below.
-// [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1823135
-// [2] https://www.reddit.com/r/firefox/comments/17a0noa/nvidia_video_super_resolution_not_working_on/
-// [3] https://blogs.nvidia.com/blog/ai-decoded-rtxvideo-firefox/
-// [4] https://www.mozilla.org/en-US/firefox/126.0/releasenotes/
-//user_pref("gfx.webrender.super-resolution.nvidia", true); // [REMOVED]
-
 // PREF: GPU-accelerated Canvas2D
-// Use gpu-canvas instead of to skia-canvas.
+// Uses Accelerated Canvas2D for hardware acceleration of Canvas2D.
+// This provides a consistent acceleration architecture across all platforms
+// by utilizing WebGL instead of relying upon Direct2D.
 // [WARNING] May cause issues on some Windows machines using integrated GPUs [2] [3]
 // Add to your overrides if you have a dedicated GPU.
 // [NOTE] Higher values will use more memory.
 // [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1741501
 // [2] https://github.com/yokoffing/Betterfox/issues/153
 // [3] https://github.com/yokoffing/Betterfox/issues/198
-//user_pref("gfx.canvas.accelerated", true); // DEFAULT macOS LINUX [FF110]; not compatible with WINDOWS integrated GPUs
-    user_pref("gfx.canvas.accelerated.cache-items", 4096); // default=2048; alt=8192
-    user_pref("gfx.canvas.accelerated.cache-size", 512); // default=256; alt=1024
+//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-size", 512); // default=256; Chrome=512
    user_pref("gfx.content.skia-font-cache-size", 20); // default=5; Chrome=20
    // [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1239151#c2

@@ -132,11 +126,6 @@ user_pref("content.notify.interval", 100000); // (.10s); default=120000 (.12s)
 //user_pref("media.gpu-process-decoder", true); // DEFAULT WINDOWS
 //user_pref("media.ffmpeg.vaapi.enabled", true); // LINUX

-// PREF: disable AV1 for hardware decodeable videos
-// Firefox sometimes uses AV1 video decoding even to GPUs which do not support it.
-// [1] https://www.reddit.com/r/AV1/comments/s5xyph/youtube_av1_codec_have_worse_quality_than_old_vp9
-//user_pref("media.av1.enabled", false);
-
 // PREF: hardware and software decoded video overlay [FF116+]
 // [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1829063
 // [2] https://phabricator.services.mozilla.com/D175993
@@ -155,7 +144,7 @@ user_pref("content.notify.interval", 100000); // (.10s); default=120000 (.12s)
 // More efficient to keep the browser cache instead of having to
 // re-download objects for the websites you visit frequently.
 // [1] https://www.janbambas.cz/new-firefox-http-cache-enabled/
-//user_pref("browser.cache.disk.enable", true); // DEFAULT
+user_pref("browser.cache.disk.enable", false);

 // PREF: disk cache size
 // [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=913808,968106,968101
@@ -179,7 +168,8 @@ user_pref("content.notify.interval", 100000); // (.10s); default=120000 (.12s)
 // [3] https://support.mozilla.org/en-US/questions/1267945
 // [4] https://askubuntu.com/questions/1214862/36-syns-in-a-row-how-to-limit-firefox-connections-to-one-website
 // [5] https://bugzilla.mozilla.org/show_bug.cgi?id=1622859
-//user_pref("network.http.rcwn.enabled", true); // DEFAULT
+// [6] https://soylentnews.org/comments.pl?noupdate=1&sid=40195&page=1&cid=1067867#commentwrap
+//user_pref("network.http.rcwn.enabled", false);

 // PREF: attempt to RCWN only if a resource is smaller than this size
 //user_pref("network.http.rcwn.small_resource_size_kb", 256); // DEFAULT
@@ -220,8 +210,9 @@ user_pref("content.notify.interval", 100000); // (.10s); default=120000 (.12s)
 //user_pref("browser.cache.disk.max_priority_chunks_memory_usage", 40960); // DEFAULT (40 MB)

 // PREF: how often to validate document in cache
-// [1] https://searchfox.org/mozilla-release/source/modules/libpref/init/StaticPrefList.yaml#1092-1096
 // 0 = once-per-session
+// 1 = each-time
+// 2 = never
 // 3 = when-appropriate/automatically (default)
 //user_pref("browser.cache.check_doc_frequency", 3); // DEFAULT

@@ -240,13 +231,15 @@ user_pref("content.notify.interval", 100000); // (.10s); default=120000 (.12s)
 // 0 = do not compress (default)
 // 1 = minimal compression
 // 9 = maximal compression
-user_pref("browser.cache.jsbc_compression_level", 3);
+//user_pref("browser.cache.jsbc_compression_level", 3);

 // PREF: strategy to use for when the bytecode should be encoded and saved [TESTING ONLY]
-// -1 makes page load times marginally longer when a page is being loaded for the first time.
-// Subsequent reload of websites will be much much faster.
+// -1 makes page load times marginally longer when a page is being loaded for the first time, while
+// subsequent reload of websites will be much much faster.
+// 0 means that the bytecode is created every 4 page loads [3].
 // [1] https://searchfox.org/mozilla-release/source/modules/libpref/init/StaticPrefList.yaml#3461-3488
 // [2] https://www.reddit.com/r/firefox/comments/12786yv/improving_performance_in_firefox_android_part_ii/
+// [3] https://github.com/zen-browser/desktop/issues/217
 // -1 = saved as soon as the script is seen for the first time, independently of the size or last access time
 // 0 = saved in order to minimize the page-load time (default)
 //user_pref("dom.script_loader.bytecode_cache.enabled", true); // DEFAULT
@@ -261,13 +254,14 @@ user_pref("browser.cache.jsbc_compression_level", 3);
 // that only contains settings for systems at or below 8GB of system memory [1].
 // Waterfox G6 allows it to go above 8GB machines [3].
 // 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,
+// -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.max_entry_size", 10240); // (10 MB); default=5120 (5 MB)
+//user_pref("browser.cache.memory.capacity", 131072); // (128 MB)
+//user_pref("browser.cache.memory.max_entry_size", 20480); // (20 MB); 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
@@ -278,7 +272,7 @@ user_pref("browser.cache.jsbc_compression_level", 3);
 // 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);

 /****************************************************************************
 * SECTION: MEDIA CACHE                                                     *
@@ -291,6 +285,8 @@ user_pref("browser.cache.jsbc_compression_level", 3);
 // [1] https://hg.mozilla.org/mozilla-central/file/tip/modules/libpref/init/StaticPrefList.yaml#l9652
 // [2] https://github.com/arkenfox/user.js/pull/941
 user_pref("media.memory_cache_max_size", 65536); // default=8192; AF=65536; alt=131072
+
+// PREF: media cache combine sizes
 //user_pref("media.memory_caches_combined_limit_kb", 524288); // DEFAULT; alt=1048576
 //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

@@ -328,13 +324,14 @@ user_pref("image.mem.decode_bytes_at_a_time", 32768); // default=16384; alt=6553
 ****************************************************************************/

 // PREF: use bigger packets
-// [WARNING] Cannot open HTML files bigger than 4MB if changed [2].
+// [WARNING] Cannot open HTML files bigger than 4MB if value is too large [2].
 // Reduce Firefox's CPU usage by requiring fewer application-to-driver data transfers.
 // However, it does not affect the actual packet sizes transmitted over the network.
 // [1] https://www.mail-archive.com/support-seamonkey@lists.mozilla.org/msg74561.html
 // [2] https://github.com/yokoffing/Betterfox/issues/279
-//user_pref("network.buffer.cache.size", 262144); // 256 kb; default=32768 (32 kb)
-//user_pref("network.buffer.cache.count", 128); // default=24
+// [3] https://ra1ahq.blog/en/optimizaciya-proizvoditelnosti-mozilla-firefox
+//user_pref("network.buffer.cache.size", 65535); // default=32768 (32 kb); 262144 too large
+//user_pref("network.buffer.cache.count", 48); // default=24; 128 too large

 // PREF: increase the absolute number of HTTP connections
 // [1] https://kb.mozillazine.org/Network.http.max-connections
@@ -407,20 +404,28 @@ 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 <link rel="dns-prefetch">
+// PREF: DNS prefetching for HTMLLinkElement <link rel="dns-prefetch">
 // Used for cross-origin connections to provide small performance improvements.
-// Disable DNS prefetching to prevent Firefox from proactively resolving
-// hostnames for other domains linked on a page. This may eliminate
-// unnecessary DNS lookups, but can increase latency when following external links.
+// You can enable rel=dns-prefetch for the HTTPS document without prefetching
+// DNS for anchors, whereas the latter makes more specualtive requests [5].
 // [1] https://bitsup.blogspot.com/2008/11/dns-prefetching-for-firefox.html
 // [2] https://css-tricks.com/prefetching-preloading-prebrowsing/#dns-prefetching
 // [3] https://www.keycdn.com/blog/resource-hints#2-dns-prefetching
 // [4] http://www.mecs-press.org/ijieeb/ijieeb-v7-n5/IJIEEB-V7-N5-2.pdf
-// [5] https://bugzilla.mozilla.org/show_bug.cgi?id=1596935
+// [5] https://bugzilla.mozilla.org/show_bug.cgi?id=1596935#c28
 user_pref("network.dns.disablePrefetch", true);
-user_pref("network.dns.disablePrefetchFromHTTPS", true); // (FF127+ false)
+    user_pref("network.dns.disablePrefetchFromHTTPS", true); // [FF127+ false]
+
+// PREF: DNS prefetch for HTMLAnchorElement (speculative DNS)
+// Disable speculative DNS calls to prevent Firefox from resolving
+// hostnames for other domains linked on a page. This may eliminate
+// unnecessary DNS lookups, but can increase latency when following external links.
+// [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1596935#c28
+// [2] https://github.com/arkenfox/user.js/issues/1870#issuecomment-2220773972
+//user_pref("dom.prefetch_dns_for_anchor_http_document", false); // [FF128+]
+//user_pref("dom.prefetch_dns_for_anchor_https_document", false); // DEFAULT [FF128+]

 // PREF: enable <link rel="preconnect"> tag and Link: rel=preconnect response header handling
 //user_pref("network.preconnect", true); // DEFAULT
@@ -432,31 +437,11 @@ user_pref("network.dns.disablePrefetchFromHTTPS", true); // (FF127+ false)
 // [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);
-
-// PREF: network preload <link rel="preload"> [REMOVED]
-// Used to load high-priority resources faster on the current page, for strategic
-// performance improvements.
-// Instructs the browser to immediately fetch and cache high-priority resources
-// for the current page to improve performance. The browser downloads resources
-// but does not execute scripts or apply stylesheets - it just caches them for
-// instant availability later.
-// Unlike other pre-connection tags (except modulepreload), this tag is
-// mandatory for the browser.
-// [1] https://developer.mozilla.org/en-US/docs/Web/HTML/Link_types/preload
-// [2] https://w3c.github.io/preload/
-// [3] https://3perf.com/blog/link-rels/#preload
-// [4] https://medium.com/reloading/preload-prefetch-and-priorities-in-chrome-776165961bbf
-// [5] https://www.smashingmagazine.com/2016/02/preload-what-is-it-good-for/#how-can-preload-do-better
-// [6] https://www.keycdn.com/blog/resource-hints#preload
-// [7] https://github.com/arkenfox/user.js/issues/1098#issue-791949341
-// [8] https://yashints.dev/blog/2018/10/06/web-perf-2#preload
-// [9] https://web.dev/preload-critical-assets/
-//user_pref("network.preload", true); // [REMOVED]
+user_pref("browser.places.speculativeConnect.enabled", false);

 // PREF: network module preload <link rel="modulepreload"> [FF115+]
 // High-priority loading of current page JavaScript modules.
@@ -514,7 +499,7 @@ 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
@@ -555,28 +540,17 @@ 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);

 // PREF: Prioritized Task Scheduling API [NIGHTLY]
-// [1] https://blog.mozilla.org/performance/2022/06/02/prioritized-task-scheduling-api-is-prototyped-in-nightly/
-// [2] https://medium.com/airbnb-engineering/building-a-faster-web-experience-with-the-posttask-scheduler-276b83454e91
-user_pref("dom.enable_web_task_scheduling", true);
-
-// PREF: HTML Sanitizer API [NIGHTLY]
-// [1] https://developer.mozilla.org/en-US/docs/Web/API/Sanitizer
-// [2] https://caniuse.com/mdn-api_sanitizer
-user_pref("dom.security.sanitizer.enabled", true);
-
-// PREF: WebGPU [HIGHLY EXPERIMENTAL!]
-// [WARNING] Do not enable unless you are a web developer!
-// [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1746245
-// [2] https://developer.chrome.com/docs/web-platform/webgpu/
-// [3] https://github.com/gpuweb/gpuweb/wiki/Implementation-Status
-// [4] https://hacks.mozilla.org/2020/04/experimental-webgpu-in-firefox/
-//user_pref("dom.webgpu.enabled", true);
-    //user_pref("gfx.webgpu.force-enabled", true); // enforce
-// enable WebGPU indirect draws/dispatches:
-//user_pref("dom.webgpu.indirect-dispatch.enabled", true);
+// [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                                                      *
@@ -593,18 +567,18 @@ user_pref("dom.security.sanitizer.enabled", true);
 // PREF: determine when tabs unload [WINDOWS] [LINUX]
 // Notify TabUnloader or send the memory pressure if the memory resource
 // notification is signaled AND the available commit space is lower than
-// this value.
-// Set this to some high value, e.g. 2/3 of total memory available in your system:
-// 4GB=2640, 8GB=5280, 16GB=10560, 32GB=21120, 64GB=42240
+// this value (in MiB).
+// Set this to some value, e.g. 4/5 of total memory available on your system:
+// 4GB=3276, 8GB=6553, 16GB=13107, 32GB=25698, 64GB=52429
 // [1] https://dev.to/msugakov/taking-firefox-memory-usage-under-control-on-linux-4b02
-//user_pref("browser.low_commit_space_threshold_mb", 2640); // default=200; WINDOWS LINUX
+//user_pref("browser.low_commit_space_threshold_mb", 3276); // default=200; WINDOWS LINUX

 // PREF: determine when tabs unload [LINUX]
 // On Linux, Firefox checks available memory in comparison to total memory,
 // and use this percent value (out of 100) to determine if Firefox is in a
 // low memory scenario.
 // [1] https://dev.to/msugakov/taking-firefox-memory-usage-under-control-on-linux-4b02
-//user_pref("browser.low_commit_space_threshold_percent", 33); // default=5; LINUX
+//user_pref("browser.low_commit_space_threshold_percent", 20); // default=5; LINUX

 // PREF: determine how long (in ms) tabs are inactive before they unload
 // 60000=1min; 300000=5min; 600000=10min (default)
@@ -3,7 +3,7 @@
 * Peskyfox                                                                 *
 * "Aquila non capit muscas"                                                *
 * priority: remove annoyances                                              *
- * version: 126                                                             *
+ * version: 137                                                             *
 * 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                          *
@@ -65,14 +65,12 @@ user_pref("browser.aboutwelcome.enabled", false); // disable Intro screens
 // PREF: disable "What's New" toolbar icon [FF69+]
 //user_pref("browser.messaging-system.whatsNewPanel.enabled", false);

-// PREF: only show List All Tabs icon when needed
-// true=always show tab overflow dropdown (FF106+ default)
-// false=only display tab dropdown when there are too many tabs
-// [1] https://www.ghacks.net/2022/10/19/how-to-hide-firefoxs-list-all-tabs-icon/
-user_pref("browser.tabs.tabmanager.enabled", false);
+// PREF: new profile switcher
+user_pref("browser.profiles.enabled", true);

-// PREF: enable new screenshot tool [FF122+]
-//user_pref("screenshots.browser.component.enabled", true);
+// PREF: use native title bar buttons [LINUX]
+// [1] https://github.com/yokoffing/Betterfox/issues/320
+//user_pref("widget.gtk.non-native-titlebar-buttons.enabled", true);

 /****************************************************************************
 * SECTION: THEME ADJUSTMENTS                                              *
@@ -84,12 +82,6 @@ user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true);
 // PREF: add compact mode back to options
 user_pref("browser.compactmode.show", true);

-// PREF: remove focus indicator for links
-// [1] https://www.askvg.com/firefox-tip-restore-classic-dotted-outline-focus-indicator-for-links/
-user_pref("browser.display.focus_ring_on_anything", true); 
-user_pref("browser.display.focus_ring_style", 0);
-user_pref("browser.display.focus_ring_width", 0);
-
 // PREF: preferred color scheme for websites
 // [SETTING] General>Language and Appearance>Website appearance
 // By default, color scheme matches the theme of your browser toolbar (3).
@@ -105,28 +97,31 @@ user_pref("layout.css.prefers-color-scheme.content-override", 2);
 // PREF: prevent private windows being separate from normal windows in taskbar [WINDOWS] [FF106+]
 user_pref("browser.privateWindowSeparation.enabled", false);

-// PREF: reduce the size of the "private window" indicator in tab bar [FF106+]
-//user_pref("browser.privatebrowsing.enable-new-indicator", false); // REMOVED [FF119+]
-
 // PREF: show search bar [FF122+]
 // Mozilla has removed the search bar option from the settings window.
 //user_pref("browser.search.widget.inNavBar", true);

+// PREF: new tab page wallpapers
+//user_pref("browser.newtabpage.activity-stream.newtabWallpapers.v2.enabled", true); // [DEFAULT FF132+]
+
 /****************************************************************************
 * SECTION: COOKIE BANNER HANDLING                                         *
 ****************************************************************************/

 // PREF: Cookie Banner handling
+// [DEPRECIATED] Future of the project is unclear. See [5] and [6].
 // [NOTE] Feature still enforces Total Cookie Protection to limit 3rd-party cookie tracking [1]
 // [1] https://github.com/mozilla/cookie-banner-rules-list/issues/33#issuecomment-1318460084
 // [2] https://phabricator.services.mozilla.com/D153642
 // [3] https://winaero.com/make-firefox-automatically-click-on-reject-all-in-cookie-banner-consent/
 // [4] https://docs.google.com/spreadsheets/d/1Nb4gVlGadyxix4i4FBDnOeT_eJp2Zcv69o-KfHtK-aA/edit#gid=0
+// [5] https://bugzilla.mozilla.org/show_bug.cgi?id=1940418
+// [6] https://github.com/mozilla/cookie-banner-rules-list/issues/544
 // 2: reject banners if it is a one-click option; otherwise, fall back to the accept button to remove banner
 // 1: reject banners if it is a one-click option; otherwise, keep banners on screen
 // 0: disable all cookie banner handling
-user_pref("cookiebanners.service.mode", 1);
-user_pref("cookiebanners.service.mode.privateBrowsing", 1);
+//user_pref("cookiebanners.service.mode", 1);
+//user_pref("cookiebanners.service.mode.privateBrowsing", 1);

 // PREF: Cookie Banner global rules
 // Global rules that can handle a list of cookie banner libraries and providers on any site.
@@ -173,8 +168,7 @@ user_pref("full-screen-api.warning.timeout", 0); // default=3000
 // [2] https://reddit.com/r/firefox/comments/wvs04y/comment/ilklzy1/?context=3
 //user_pref("gfx.font_rendering.cleartype_params.rendering_mode", 5);
 //user_pref("gfx.font_rendering.cleartype_params.cleartype_level", 100);
-//user_pref("gfx.font_rendering.cleartype_params.force_gdi_classic_for_families", "");
-//user_pref("gfx.font_rendering.cleartype_params.force_gdi_classic_max_size", 6);
+//user_pref("gfx.font_rendering.cleartype_params.force_gdi_classic_for_families", ""); // DEFAULT FF135+
 //user_pref("gfx.font_rendering.directwrite.use_gdi_table_loading", false);
 // Some users find these helpful:
    //user_pref("gfx.font_rendering.cleartype_params.gamma", 1750);
@@ -200,7 +194,7 @@ user_pref("browser.urlbar.suggest.engines", false);
 //user_pref("browser.urlbar.shortcuts.quickactions", 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);
+//user_pref("browser.urlbar.suggest.calculator", true); // [DEFAULT FF137+]
 user_pref("browser.urlbar.unitConversion.enabled", true);

 // PREF: disable dropdown suggestions with empty query
@@ -213,12 +207,18 @@ user_pref("browser.urlbar.trending.featureGate", false);

 // PREF: disable urlbar suggestions
 //user_pref("browser.urlbar.addons.featureGate", false); // [FF115+]
+//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.clipboard.featureGate", false); // [FF118+] [DEFAULT: true FF125+]
 //user_pref("browser.urlbar.yelp.featureGate", false); // [FF124+] [DEFAULT: false]

+// PREF: disable recent searches [FF120+]
+// [NOTE] Recent searches are cleared with history.
+// [1] https://support.mozilla.org/kb/search-suggestions-firefox
+//user_pref("browser.urlbar.recentsearches.featureGate", false);
+
 // PREF: disable tab-to-search [FF85+]
 // Alternatively, you can exclude on a per-engine basis by unchecking them in Options>Search
 // [SETTING] Privacy & Security>Address Bar>When using the address bar, suggest>Search engines
@@ -237,9 +237,12 @@ user_pref("browser.urlbar.trending.featureGate", false);
 // disable=0
 //user_pref("browser.urlbar.maxRichResults", 5); // default=10

-// PREF: text fragments [FF126+ NIGHTLY]
-// [1] https://developer.mozilla.org/en-US/docs/Web/Text_fragments
-//user_pref("dom.text_fragments.enabled", true);
+// PREF: text fragments
+// [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
+//user_pref("dom.text_fragments.enabled", true); // [DEFAULT]
+user_pref("dom.text_fragments.create_text_fragment.enabled", true);

 /****************************************************************************
 * SECTION: AUTOPLAY                                                        *
@@ -263,13 +266,13 @@ user_pref("browser.urlbar.trending.featureGate", false);
 * SECTION: NEW TAB PAGE                                                    *
 ****************************************************************************/

-// PREF: open windows/tabs from last session
+// PREF: startup / new tab page
 // 0=blank, 1=home, 2=last visited page, 3=resume previous session
 // [NOTE] Session Restore is cleared with history and not used in Private Browsing mode
-// [SETTING] General>Startup>Restore previous session
+// [SETTING] General>Startup>Open previous windows and tabs
 //user_pref("browser.startup.page", 3);

-// PREF: set HOME+NEWWINDOW page to blank tab
+// PREF: set HOME+NEW WINDOW page to blank tab
 // about:home=Activity Stream, custom URL, about:blank
 // [SETTING] Home>New Windows and Tabs>Homepage and new windows
 // [Custom URLs] Set two or more websites in Home Page Field – delimited by |
@@ -286,12 +289,12 @@ user_pref("browser.urlbar.trending.featureGate", false);
 // [1] https://github.com/arkenfox/user.js/issues/1556
 //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.showWeather", false); // Weather [FF128+ NIGHTLY]
-    //user_pref("browser.newtabpage.activity-stream.system.showWeather", false); // Weather [FF128+ NIGHTLY]
+//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.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.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);
@@ -304,7 +307,7 @@ user_pref("browser.newtabpage.activity-stream.feeds.section.topstories", false);

 // PREF: clear default topsites
 // [NOTE] This does not block you from adding your own.
-//user_pref("browser.newtabpage.activity-stream.default.sites", "");
+user_pref("browser.newtabpage.activity-stream.default.sites", "");

 // PREF: keep search in the search box; prevent from jumping to address bar
 // [1] https://www.reddit.com/r/firefox/comments/oxwvbo/firefox_start_page_search_options/
@@ -342,7 +345,7 @@ user_pref("extensions.pocket.enabled", false);
 // [SETTING] General>Files and Applications>Applications>What should Firefox do with other files?
 // false=Save files
 // true=Ask whether to open or save files
-user_pref("browser.download.always_ask_before_handling_new_types", true);
+//user_pref("browser.download.always_ask_before_handling_new_types", true);

 // PREF: always ask where to download
 // [OPTIONAL HARDENING] Enforce user interaction for greater security.
@@ -506,24 +509,19 @@ user_pref("layout.word_select.eat_space_to_next_word", false);
 //user_pref("dom.disable_open_during_load", true); // DEFAULT
 //user_pref("privacy.popups.showBrowserMessage", true); // DEFAULT

-// PREF: enable Tab Preview [FF122+]
-//user_pref("browser.tabs.cardPreview.enabled", true);
+// PREF: enable Tab Previews [FF122+, FF128+]
+// [1] https://github.com/yokoffing/Betterfox/issues/309
+//user_pref("browser.tabs.hoverPreview.enabled", true);
+    //user_pref("browser.tabs.hoverPreview.showThumbnails", true); // DEFAULT

 /****************************************************************************
- * SECTION: UNCATEGORIZED                                                   *
-****************************************************************************/
+ * SECTION: KEYBOARD AND SHORTCUTS                                          *
+ ****************************************************************************/

 // PREF: disable backspace action
 // 0=previous page, 1=scroll up, 2=do nothing
 //user_pref("browser.backspace_action", 2); // DEFAULT

-// PREF: disable Reader mode
-// [TIP] Use about:reader?url=%s as a keyword to open links automatically in reader mode [1].
-// Firefox will not have to parse webpage for Reader when navigating.
-// Extremely minimal performance impact, if you disable.
-// [1] https://www.reddit.com/r/firefox/comments/621sr2/i_found_out_how_to_automatically_open_a_url_in/ 
-//user_pref("reader.parse-on-load.enabled", false);
-
 // PREF: disable ALT key toggling the menu bar
 //user_pref("ui.key.menuAccessKeyFocuses", false);
    //user_pref("ui.key.menuAccessKey", 18); // DEFAULT
@@ -532,6 +530,26 @@ user_pref("layout.word_select.eat_space_to_next_word", false);
 // [SETTING] Ctrl+Tab cycles through tabs in recently used order
 //user_pref("browser.ctrlTab.sortByRecentlyUsed", true);

+// PREF: disable websites overriding Firefox's keyboard shortcuts [FF58+]
+// 0=ask (default), 1=allow, 2=block
+// [SETTING] to add site exceptions: Ctrl+I>Permissions>Override Keyboard Shortcuts ***/
+//user_pref("permissions.default.shortcuts", 2);
+
+// PREF: hide frequent sites on right-click of taskbar icon [WINDOWS?]
+//user_pref("browser.taskbar.lists.frequent.enabled", false);
+
+/****************************************************************************
+ * SECTION: ACCESSIBILITY AND USABILITY                                     *
+ ****************************************************************************/
+
+// PREF: disable Reader mode parse on load
+// Reader supposedly costs extra CPU after page load.
+// [TIP] Use about:reader?url=%s as a keyword to open links automatically in reader mode [1].
+// Firefox will not have to parse webpage for Reader when navigating.
+// Extremely minimal performance impact, if you disable.
+// [1] https://www.reddit.com/r/firefox/comments/621sr2/i_found_out_how_to_automatically_open_a_url_in/ 
+//user_pref("reader.parse-on-load.enabled", false);
+
 // PREF: Spell-check
 // 0=none, 1-multi-line, 2=multi-line & single-line
 //user_pref("layout.spellcheckDefault", 1); // DEFAULT
@@ -540,9 +558,25 @@ user_pref("layout.word_select.eat_space_to_next_word", false);
 // [1] https://kb.mozillazine.org/Ui.SpellCheckerUnderlineStyle#Possible_values_and_their_effects
 //user_pref("ui.SpellCheckerUnderlineStyle", 1);

+// PREF: remove underlined characters from various settings
+//user_pref("ui.key.menuAccessKey", 0);
+
+// PREF: enable CSS moz document rules
+// Still needed for Stylus?
+// [1] https://reddit.com/r/FirefoxCSS/comments/8x2q97/reenabling_mozdocument_rules_in_firefox_61/
+//user_pref("layout.css.moz-document.content.enabled", true);
+
+/****************************************************************************
+ * SECTION: BOOKMARK MANAGEMENT                                             *
+ ****************************************************************************/
+
 // PREF: limit the number of bookmark backups Firefox keeps
 //user_pref("browser.bookmarks.max_backups", 1); // default=15

+/****************************************************************************
+ * SECTION: ZOOM AND DISPLAY SETTINGS                                       *
+ ****************************************************************************/
+
 // PREF: zoom only text on webpage, not other elements
 //user_pref("browser.zoom.full", false);

@@ -557,47 +591,40 @@ user_pref("layout.word_select.eat_space_to_next_word", false);
 //user_pref("mousewheel.with_control.action", 3);
 //user_pref("mousewheel.with_meta.action", 3);

-// PREF: hide image placeholders
-//user_pref("browser.display.show_image_placeholders", false);
+// PREF: adjust the minimum tab width
+// Can be overridden by userChrome.css
+//user_pref("browser.tabs.tabMinWidth", 120); // default=76
+
+// PREF: always underline links [FF120+]
+//user_pref("layout.css.always_underline_links", false); // DEFAULT
+
+/****************************************************************************
+ * SECTION: DEVELOPER TOOLS                                                 *
+ ****************************************************************************/

 // PREF: wrap long lines of text when using source / debugger
 //user_pref("view_source.wrap_long_lines", true);
 //user_pref("devtools.debugger.ui.editor-wrapping", true);

-// PREF: enable ASRouter Devtools at about:newtab#devtools (useful if you're making your own CSS theme)
+// PREF: enable ASRouter Devtools at about:newtab#devtools
+// This is useful if you're making your own CSS theme.
 // [1] https://firefox-source-docs.mozilla.org/browser/components/newtab/content-src/asrouter/docs/debugging-docs.html
 //user_pref("browser.newtabpage.activity-stream.asrouter.devtoolsEnabled", true);
+
 // show user agent styles in the inspector
 //user_pref("devtools.inspector.showUserAgentStyles", true);
-// show native anonymous content (like scrollbars or tooltips) and user agent shadow roots (like the components of an <input> element) in the inspector
+
+// show native anonymous content (like scrollbars or tooltips) and user
+// agent shadow roots (like the components of an <input> element) in the inspector
 //user_pref("devtools.inspector.showAllAnonymousContent", true);

-// PREF: print preview
-//user_pref("print.tab_modal.enabled", true); // DEFAULT
-
-// PREF: adjust the minimum tab width
-// Can be overridden by userChrome.css
-//user_pref("browser.tabs.tabMinWidth", 120); // default=76
-
-// PREF: remove underlined characters from various settings
-//user_pref("ui.key.menuAccessKey", 0);
-
-// PREF: disable websites overriding Firefox's keyboard shortcuts [FF58+]
-// 0=ask (default), 1=allow, 2=block
-// [SETTING] to add site exceptions: Ctrl+I>Permissions>Override Keyboard Shortcuts ***/
-//user_pref("permissions.default.shortcuts", 2);
+/****************************************************************************
+ * SECTION: IMAGE AND MEDIA HANDLING                                        *
+ ****************************************************************************/

 // PREF: JPEG XL image format [NIGHTLY]
 // May not affect anything on ESR/Stable channel [2].
-// [TEST] https://jpegxl.io/tutorials/firefox/#firefoxjpegxltutorial
+// [TEST] https://www.jpegxl.io/firefox#firefox-jpegxl-tutorial
 // [1] https://cloudinary.com/blog/the-case-for-jpeg-xl
 // [2] https://bugzilla.mozilla.org/show_bug.cgi?id=1539075#c51
 //user_pref("image.jxl.enabled", true);
-
-// PREF: enable CSS moz document rules
-// Still needed for Stylus?
-// [1] https://reddit.com/r/FirefoxCSS/comments/8x2q97/reenabling_mozdocument_rules_in_firefox_61/
-//user_pref("layout.css.moz-document.content.enabled", true);
-
-// PREF: always underline links [FF120+]
-//user_pref("layout.css.always_underline_links", false); // DEFAULT
@@ -1,35 +1,24 @@
-![GitHub Maintained](https://img.shields.io/badge/open%20source-yes-orange)
-![GitHub Maintained](https://img.shields.io/badge/maintained-yes-yellow)
-[![Visitors](https://hits.seeyoufarm.com/api/count/incr/badge.svg?url=https%3A%2F%2Fgithub.com%2Fyokoffing%2FBetter-Fox&count_bg=%2379C83D&title_bg=%23555555&icon=&icon_color=%23E7E7E7&title=visitors&edge_flat=false)](https://hits.seeyoufarm.com)
+![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
-31% faster than regular Firefox<sup>[1](https://medium.com/@mihirgrand/comparing-popular-firefox-forks-6fa83fdfdaad#:~:text=31%25%20more%20than%20vanilla%20Firefox)</sup> :rocket:
-
 [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/).

-:new: Now with [ESR support](https://github.com/yokoffing/Betterfox/tree/esr115#betterfox-esr).
-
 ## Made for everyday browsing
-**A secure, blazing fast browsing experience. Without breakage.**
+[Faster](https://medium.com/@mihirgrand/comparing-popular-firefox-forks-6fa83fdfdaad#:~:text=31%25%20more%20than%20vanilla%20Firefox), more private and secure — without using third-party code.

-Betterfox is an opinionated preference list inspired by the [law of diminishing returns](http://psychologyofwellbeing.com/wp-content/uploads/2017/01/Diminishing-Returns.gif) and the [minimum effective dose](https://medium.com/the-mission/less-is-more-the-minimum-effective-dose-e6d56625931e).
+Betterfox is an opinionated preference list inspired by the [law of diminishing returns](https://miro.medium.com/v2/resize:fit:1206/1*lcOcxriV_II_lZuXQYLoXg.jpeg) and the [minimum effective dose](https://medium.com/the-mission/less-is-more-the-minimum-effective-dose-e6d56625931e).

 ## Required reading
-*If you don't have it already: [Get Firefox](https://www.mozilla.org/en-US/firefox/all/#product-desktop-release)*
-
 0) Create a [backup profile](https://github.com/yokoffing/Betterfox/wiki/Backup).
 1) Download the user.js file [here](https://raw.githubusercontent.com/yokoffing/Betterfox/main/user.js) (Right click > `Save Link As…`).
-2) Review [Common Overrides](https://github.com/yokoffing/Betterfox/wiki/Common-Overrides) and make any necessary changes.
-   * See also [Optional Hardening](https://github.com/yokoffing/Betterfox/wiki/Optional-Hardening) for other recommendations.
+2) Review both [Common Overrides](https://github.com/yokoffing/Betterfox/wiki/Common-Overrides) and [Optional Hardening](https://github.com/yokoffing/Betterfox/wiki/Optional-Hardening) to make any necessary changes.
 3) Open Firefox. In the URL bar, type `about:profiles` and press **Enter**.
-4) For the profile you want to use (or use default), click **Open Folder** in the **Root Directory** section.
+4) For the profile you want to use, click **Open Folder** in the **Root Directory** section.
 5) Move the `user.js` file into the folder.

 *After restarting Firefox:*
 1) Get an **ad blocker** like [uBlock Origin](https://addons.mozilla.org/blog/ublock-origin-everything-you-need-to-know-about-the-ad-blocker/) with our [recommended filters](https://github.com/yokoffing/filterlists#guidelines).
-2) Enable **DNS-level protection** with [NextDNS](https://nextdns.io/?from=xujj63g5). <sup><i>Use the link and support this page!</i></sup>
-    * Check out our configuration [guide](https://github.com/yokoffing/NextDNS-Config) for the best experience.
-    * See how to [quickly enable](https://support.mozilla.org/en-US/kb/dns-over-https) **secure DNS** in Firefox.
+2) Enable **DNS-level protection** with your chosen [provider](https://github.com/yokoffing/Betterfox/wiki/Optional-Hardening#secure-dns) to further protect against security threats, ads, and trackers.

 ## Simple goals
 1) **Minimalism:** get what isn't needed out of the way
@@ -53,14 +42,20 @@ The `user.js` — a configuration file that controls Firefox settings — is cur
 ## Recognition

 ### Browser Integration
+> [!IMPORTANT]
+> 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)
 * [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)

 ### YouTube
+* [A Better Firefox](https://youtu.be/JuHIwCFx34Q?si=1dx39t3HX5kzNVj-&t=133) (Mar 2025)
+* [Ditch Chrome for One Of These BETTER BROWSERS!](https://youtu.be/ygkxFc8SZlc?si=m5NQe-b_oFXs5crb&t=230) (Aug 2024)
 * [The ULTIMATE Browser Tier List](https://youtu.be/j5r6jFE8gic?t=560) (Mar 2023)
 * [I Hate Firefox. But I'm Still Switching Back to It.](https://youtu.be/w0SJFED5xK0?t=220) (Nov 2022)
 * [Español] [Optimize and Accelerate Firefox](https://www.youtube.com/watch?v=3XtoONmq5_Q) (Nov 2022) 
@@ -71,7 +66,8 @@ The `user.js` — a configuration file that controls Firefox settings — is cur
 * [GhoSTORIES with Franz & Pete](https://anchor.fm/ghostories/episodes/S2E6-We-Talking-Ghostery-Dawn----Again-er0q02/a-a4o5vmh) | 17:05–18:40 (Feb 2021)

 ### Articles
-* [Browsers for Daily Using](https://anhkhoakz.neocities.org/blog/browsers-for-daily-using) (Jan 2024)
+* [Español] [Firefox is an excellent browser, but this small modification makes it much faster and more private](https://www.genbeta.com/a-fondo/firefox-excelente-navegador-esta-pequena-modificacion-hace-mucho-rapido-privado-asi-funciona-betterfox) (Jan 2025)
+* [Browsers for Daily Use](https://anhkhoakz.neocities.org/blog/browsers-for-daily-using/#firefox-but-hardened) (Jan 2024)
 * [Avoiding Manifest V3 – Escaping the Ad-Pocalypse](https://www.xbitlabs.com/avoiding-manifest-v3/) (Dec 2023)
 * [German] [Pulse Browser Review: Firefox fork with Turbo tweaks and Opera sidebar](https://www.computerbild.de/artikel/cb-Tipps-Software-Pulse-Browser-Review-ein-Firefox-Fork-mit-Seitenleiste-wie-bei-Opera-35644139.html#:~:text=Noch%20mehr%20Speed%2DFeatures) (Apr 2023)
 * [2023 Browser Showdown: Comparing Chrome, Brave, Firefox, Vivaldi, and Opera](https://www.appdate.lk/technology/2023-browser-showdown/) (Jan 2023)
@@ -86,9 +82,10 @@ The `user.js` — a configuration file that controls Firefox settings — is cur
 * “I use this one ... The performance is absolutely amazing. There’s definitely a huge difference when it comes to loading sites.” - [DIRIKtv](https://youtu.be/N8IOJiOFVEk?t=16)
 * "BetterFox ... will provide good-enough privacy and help with performance." - [Qdoit12Super](https://old.reddit.com/r/browsers/comments/139h4my/suggestion_for_finding_3_good_privacy_focus/jj3n3qn/?context=2)
 * "...drastically changed the experience with Firefox for me. Improved speed, security, smoothness, and removed clutter." - [AppDate](https://www.appdate.lk/technology/2023-browser-showdown/#:~:text=Used%20the%20BetterFox%20user%20config%20settings%20with%20some%20overrides%20which%20drastically%20changed%20the%20experience)
+* "Firefox with uBlock Origin extension and tuned with Betterfox is faster than Safari."  - [cugeloid](https://elephas.app/blog/best-browsers-mac#what-is-the-best-browser-for-mac-according-to-redditandnbsp)
 * "I don't think I could use Firefox without Betterfox." - [Professional_Fun4616](https://old.reddit.com/r/nextdns/comments/15y815f/the_people_behind_betterfox_have_this_awesome/jxb7cir/?context=3)
 * "The best collection of tweaks available." - [AuRiMaS](https://old.reddit.com/r/MozillaFirefox/comments/15cc1vk/about_changes_in_aboutconfig/jtyx910/?context=3)
-* "FF is now much snappier! Thanks a lot for the suggestions!" - [whotheff](https://old.reddit.com/r/firefox/comments/z5auzi/firefox_not_properly_usingrecognizing_gpu_poor/iy36hyz/)
+* "FF is now much snappier!" - [whotheff](https://old.reddit.com/r/firefox/comments/z5auzi/firefox_not_properly_usingrecognizing_gpu_poor/iy36hyz/)
 * "...the experience is so good now I don’t think I’ll go back to any of the chromium based browsers." - [Mr_Compromise](https://old.reddit.com/r/pcmasterrace/comments/zwioe1/what_browser_will_you_be_using_in_2023_please/j1wmbxo/)

 ## Support
@@ -103,6 +100,7 @@ If you like the project, leave a :star: (top right) and become a [stargazer](htt
 ## Credit
 * Betterfox mirrors the ongoing work provided by [arkenfox](https://github.com/arkenfox/user.js). Additionally, this repository includes content reproduced or adapted from other sources. Credit for overlapping material goes to the original authors.
 * Appreciation goes to the [Firefox](https://www.mozilla.org/en-US/firefox/new/) team and developers working on [Bugzilla](https://bugzilla.mozilla.org/home), fighting for the open web.
+* 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.

@@ -3,7 +3,7 @@
 * Securefox                                                                *
 * "Natura non contristatur"                                                *     
 * priority: provide sensible security and privacy                          *
- * version: 126                                                             *
+ * version: 138                                                             *
 * 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                          *
@@ -21,10 +21,10 @@
 // [NOTE] FF86: "Strict" tracking protection enables dFPI.
 // [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]
 //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
-user_pref("browser.contentblocking.category", "strict");
 //user_pref("privacy.trackingprotection.socialtracking.enabled", true); // enabled with "Strict"
    //user_pref("privacy.socialtracking.block_cookies.enabled", true); // DEFAULT
 //user_pref("privacy.trackingprotection.cryptomining.enabled", true); // DEFAULT
@@ -38,6 +38,8 @@ user_pref("browser.contentblocking.category", "strict");
    //user_pref("privacy.annotate_channels.strict_list.pbmode.enabled", true); // DEFAULT
 //user_pref("privacy.fingerprintingProtection", true); // [FF114+] [ETP FF119+] enabled with "Strict"
    //user_pref("privacy.fingerprintingProtection.pbmode", true); // DEFAULT
+//user_pref("privacy.bounceTrackingProtection.mode", 1); // [FF131+] [ETP FF133+]
+// [1] https://searchfox.org/mozilla-central/source/toolkit/components/antitracking/bouncetrackingprotection/nsIBounceTrackingProtection.idl#11-23

 // PREF: query stripping
 // Currently uses a small list [1]
@@ -54,15 +56,27 @@ user_pref("browser.contentblocking.category", "strict");
 //user_pref("privacy.query_stripping.strip_list", ""); // DEFAULT
 //user_pref("privacy.query_stripping.strip_on_share.enabled", true);

-// PREF: allow embedded tweets, Instagram and Reddit posts, and TikTok embeds
+// PREF: Smartblock
+// [1] https://support.mozilla.org/en-US/kb/smartblock-enhanced-tracking-protection
+// [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); // [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/
 // [TEST - instagram embed] https://www.ndtv.com/entertainment/bharti-singh-and-husband-haarsh-limbachiyaa-announce-pregnancy-see-trending-post-2646359
 // [TEST - tweet embed] https://www.newsweek.com/cryptic-tweet-britney-spears-shows-elton-john-collab-may-date-back-2015-1728036
 // [TEST - tiktok embed] https://www.vulture.com/article/snl-adds-four-new-cast-members-for-season-48.html
+// [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/
-user_pref("urlclassifier.trackingSkipURLs", "*.reddit.com, *.twitter.com, *.twimg.com, *.tiktok.com"); // MANUAL
-user_pref("urlclassifier.features.socialtracking.skipURLs", "*.instagram.com, *.twitter.com, *.twimg.com"); // MANUAL
+//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+]
+
+// PREF: allow embedded tweets, Instagram and Reddit posts, and TikTok embeds [before FF136+]
+//user_pref("urlclassifier.trackingSkipURLs", "*.reddit.com, *.twitter.com, *.twimg.com, *.tiktok.com"); // MANUAL
+//user_pref("urlclassifier.features.socialtracking.skipURLs", "*.instagram.com, *.twitter.com, *.twimg.com"); // MANUAL

 // PREF: lower the priority of network loads for resources on the tracking protection list [NIGHTLY]
 // [1] https://github.com/arkenfox/user.js/issues/102#issuecomment-298413904
@@ -107,7 +121,9 @@ user_pref("urlclassifier.features.socialtracking.skipURLs", "*.instagram.com, *.
 // [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

 // PREF: Network Partitioning
@@ -120,18 +136,12 @@ user_pref("urlclassifier.features.socialtracking.skipURLs", "*.instagram.com, *.
 // [3] https://blog.mozilla.org/security/2021/01/26/supercookie-protections/
 //user_pref("privacy.partition.network_state", true); // DEFAULT
    //user_pref("privacy.partition.serviceWorkers", true); // [DEFAULT: true FF105+]
-    //user_pref("privacy.partition.network_state.ocsp_cache", true); // enabled with "Strict" [DEFAULT: true FF123+]
+    //user_pref("privacy.partition.network_state.ocsp_cache", true); // [DEFAULT: true FF123+]
    //user_pref("privacy.partition.bloburl_per_partition_key", true); // [FF118+]
 // enable APS (Always Partitioning Storage) [FF104+]
 //user_pref("privacy.partition.always_partition_third_party_non_cookie_storage", true); // [DEFAULT: true FF109+]
 //user_pref("privacy.partition.always_partition_third_party_non_cookie_storage.exempt_sessionstorage", false); // [DEFAULT: false FF109+]

-// PREF: Smartblock
-// [1] https://support.mozilla.org/en-US/kb/smartblock-enhanced-tracking-protection
-// [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); // enabled with "Strict"
-
 // PREF: Redirect Tracking Prevention / Cookie Purging
 // All storage is cleared (more or less) daily from origins that are known trackers and that
 // haven’t received a top-level user interaction (including scroll) within the last 45 days.
@@ -143,14 +153,6 @@ user_pref("urlclassifier.features.socialtracking.skipURLs", "*.instagram.com, *.
 // [6] https://firefox-source-docs.mozilla.org/toolkit/components/antitracking/anti-tracking/cookie-purging/index.html
 //user_pref("privacy.purge_trackers.enabled", true); // DEFAULT

-// PREF: Bounce Tracking Protection [FF127+ NIGHTLY]
-// A new standardised variant of Cookie Purging that uses heuristics to detect bounce trackers,
-// rather than relying on tracker lists.
-// [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1895222
-// [2] https://groups.google.com/a/mozilla.org/g/dev-platform/c/M6erM0SjPTM
-//user_pref("privacy.bounceTrackingProtection.enabled", true); // DEFAULT
-//user_pref("privacy.bounceTrackingProtection.enableDryRunMode", false); // DEFAULT
-
 // PREF: SameSite Cookies
 // Currently, the absence of the SameSite attribute implies that cookies will be
 // attached to any request for a given origin, no matter who initiated that request.
@@ -165,9 +167,10 @@ user_pref("urlclassifier.features.socialtracking.skipURLs", "*.instagram.com, *.
 // [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);
+//user_pref("network.cookie.sameSite.noneRequiresSecure", true); // [DEFAULT FF131+]
 //user_pref("network.cookie.sameSite.schemeful", true);

 // PREF: Hyperlink Auditing (click tracking)
@@ -261,6 +264,7 @@ user_pref("security.OCSP.enabled", 0);
 // [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://www.ssl.com/blogs/how-do-browsers-handle-revoked-ssl-tls-certificates/#ftoc-heading-3
+// [4] https://letsencrypt.org/2024/12/05/ending-ocsp/
 //user_pref("security.OCSP.require", true);
      
 // PREF: CRLite
@@ -272,7 +276,7 @@ user_pref("security.OCSP.enabled", 0);
 // 3 = consult CRLite and enforce "Not Revoked" results, but defer to OCSP for "Revoked" [FF99+, default FF100+]
 // [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1429800,1670985,1753071
 // [2] https://blog.mozilla.org/security/tag/crlite/
-user_pref("security.remote_settings.crlite_filters.enabled", true);
+//user_pref("security.remote_settings.crlite_filters.enabled", true); // [DEFAULT: true FF137+]
 user_pref("security.pki.crlite_mode", 2);

 // PREF: HTTP Public Key Pinning (HPKP)
@@ -302,11 +306,15 @@ user_pref("security.pki.crlite_mode", 2);
 //user_pref("security.enterprise_roots.enabled", false);
    //user_pref("security.certerrors.mitm.auto_enable_enterprise_roots", false);

-// PREF: disable content analysis by DLP (Data Loss Prevention) agents [FF124+]
-// DLP agents are background processes on managed computers that allow enterprises to monitor locally running
-// applications for data exfiltration events, which they can allow/block based on customer defined DLP policies.
+// PREF: disable content analysis by Data Loss Prevention (DLP) agents [FF124+]
+// DLP agents are background processes on managed computers that
+// allow enterprises to monitor locally running applications for
+// data exfiltration events, which they can allow/block based on
+// customer-defined DLP policies.
 // [1] https://github.com/chromium/content_analysis_sdk
-//user_pref("browser.contentanalysis.default_allow", false); // DEFAULT
+// [2] https://bugzilla.mozilla.org/show_bug.cgi?id=1880314
+//user_pref("browser.contentanalysis.enabled", false); // [FF121+] [DEFAULT]
+//user_pref("browser.contentanalysis.default_result", 0; // [FF127+] [DEFAULT]

 /****************************************************************************
 * SECTION: SSL (Secure Sockets Layer) / TLS (Transport Layer Security)    *
@@ -328,7 +336,7 @@ user_pref("security.ssl.treat_unsafe_negotiation_as_broken", true);
 // 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.
-// [STATS] SSL Labs > Renegotiation Support (Feb 2023) reports over 99.3% of top sites have secure renegotiation [4].
+// [STATS] SSL Labs > Renegotiation Support (May 2024) reports over 99.7% 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
@@ -347,6 +355,12 @@ user_pref("browser.xul.error_pages.expert_bad_cert", true);
 // [3] https://blog.cloudflare.com/tls-1-3-overview-and-q-and-a/
 user_pref("security.tls.enable_0rtt_data", false);

+// PREF: enable hybrid post-quantum key exchange
+// [1] https://pq.cloudflareresearch.com
+// [2] https://github.com/zen-browser/desktop/pull/2275
+//user_pref("security.tls.enable_kyber", true);
+//user_pref("network.http.http3.enable_kyber", true);
+
 /****************************************************************************
 * SECTION: FINGERPRINT PROTECTION (FPP)                                    *
 ****************************************************************************/
@@ -386,28 +400,24 @@ user_pref("security.tls.enable_0rtt_data", false);
 // [1] https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Releases/3.5/ICC_color_correction_in_Firefox
 //user_pref("browser.display.use_system_colors", false);

-// PREF: enforce non-native widget theme
-// Security: removes/reduces system API calls, e.g. win32k API [1]
-// Fingerprinting: provides a uniform look and feel across platforms [2]
-// [1] https://bugzilla.mozilla.org/1381938
-// [2] https://bugzilla.mozilla.org/1411425
-//user_pref("widget.non-native-theme.enabled", true); // DEFAULT
-
 /****************************************************************************
 * SECTION: DISK AVOIDANCE                                                  *
 ****************************************************************************/

-// PREF: prevent media cache from writing to disk in Private Browsing
+// PREF: set media cache in Private Browsing to in-memory
 // [NOTE] MSE (Media Source Extensions) are already stored in-memory in PB
 user_pref("browser.privatebrowsing.forceMediaMemoryCache", true);

-// PREF: set the minimum interval (in milliseconds) between session save operations,
-// when crashing or restarting to install updates
-// [NOTE] The value is how often FF checks for state changes.
-// Data is only saved when state changes [2].
+// PREF: minimum interval (in ms) between session save operations
+// Firefox periodically saves the user's session so it can restore
+// their most recent tabs and windows if the browser crashes or restarts.
+// The value sets the minimum time between these session save operations.
+// Firefox only saves session data when the state has changed since the last save [2].
+// Work has been done to mitigate potential performance drawbacks of frequent session saving [3].
 // [1] https://kb.mozillazine.org/Browser.sessionstore.interval
-// [2] https://bugzilla.mozilla.org/1304389
-user_pref("browser.sessionstore.interval", 60000); // 1 minute; default=15000 (15s)
+// [2] https://bugzilla.mozilla.org/show_bug.cgi?id=1304389#c64
+// [3] https://bugzilla.mozilla.org/show_bug.cgi?id=1304389#c66
+user_pref("browser.sessionstore.interval", 60000); // 1 minute; default=15000 (15s); 900000=15 min; 1800000=30 min

 // PREF: store extra session data when crashing or restarting to install updates
 // Dictates whether sites may save extra session data such as form content,
@@ -434,10 +444,10 @@ user_pref("browser.sessionstore.interval", 60000); // 1 minute; default=15000 (1
 //user_pref("browser.pagethumbnails.capturing_disabled", true); // [HIDDEN PREF]

 /******************************************************************************
- * SECTION: CLEARING DATA DEFAULTS                           *
+ * SECTION: SANITIZE HISTORY                                                  *
 ******************************************************************************/

-// PREF: reset default 'Time range to clear' for 'Clear Recent History'.
+// PREF: reset default 'Time range to clear' for "Clear Data" and "Clear History"
 // Firefox remembers your last choice. This will reset the value when you start Firefox.
 // 0=everything, 1=last hour, 2=last two hours, 3=last four hours,
 // 4=today, 5=last five minutes, 6=last twenty-four hours
@@ -445,18 +455,36 @@ user_pref("browser.sessionstore.interval", 60000); // 1 minute; default=15000 (1
 // blank value if they are used, but they do work as advertised.
 //user_pref("privacy.sanitize.timeSpan", 0);

-// PREF: reset default items to clear with Ctrl-Shift-Del
-// This dialog can also be accessed from the menu History>Clear Recent History
+// PREF: sanitize site data: set manual "Clear Data" items [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.cookiesAndStorage", false); // keep false until it respects "allow" site exceptions
+//user_pref("privacy.clearSiteData.historyFormDataAndDownloads", true);
+    //user_pref("privacy.clearSiteData.siteSettings", false);
+
+// PREF: sanitize history: set manual "Clear History" items, also via Ctrl-Shift-Del | clearHistory migration is FF128+
 // Firefox remembers your last choices. This will reset them when you start Firefox.
-// Regardless of what you set privacy.cpd.downloads to, as soon as the dialog
-// for "Clear Recent History" is opened, it is synced to the same as 'history'.
-//user_pref("privacy.cpd.history", true); // Browsing & Download History [DEFAULT]
-//user_pref("privacy.cpd.formdata", true); // Form & Search History [DEFAULT]
-//user_pref("privacy.cpd.cache", true); // Cache [DEFAULT]
-//user_pref("privacy.cpd.cookies", true); // Cookies [DEFAULT]
-//user_pref("privacy.cpd.sessions", false); // Active Logins [DEFAULT]
-//user_pref("privacy.cpd.offlineApps", false); // Offline Website Data [DEFAULT]
-//user_pref("privacy.cpd.siteSettings", false); // Site Preferences [DEFAULT]
+// [NOTE] Regardless of what you set "downloads" to, as soon as the dialog
+// for "Clear Recent History" is opened, it is synced to the same as "history".
+// [SETTING] Privacy & Security>History>Custom Settings>Clear History
+//user_pref("privacy.cpd.cache", true); // [DEFAULT]
+//user_pref("privacy.clearHistory.cache", true);
+//user_pref("privacy.cpd.formdata", true); // [DEFAULT]
+//user_pref("privacy.cpd.history", true); // [DEFAULT]
+    //user_pref("privacy.cpd.downloads", true); // not used; see note above
+//user_pref("privacy.clearHistory.historyFormDataAndDownloads", true);
+//user_pref("privacy.cpd.cookies", false);
+//user_pref("privacy.cpd.sessions", true); // [DEFAULT]
+//user_pref("privacy.cpd.offlineApps", false); // [DEFAULT]
+//user_pref("privacy.clearHistory.cookiesAndStorage", false);
+    //user_pref("privacy.cpd.openWindows", false); // Session Restore
+   //user_pref("privacy.cpd.passwords", false);
+   //user_pref("privacy.cpd.siteSettings", false);
+   //user_pref("privacy.clearHistory.siteSettings", false);
+
+// PREF: purge session icon in Private Browsing windows
+user_pref("browser.privatebrowsing.resetPBM.enabled", true);

 /******************************************************************************
 * SECTION: SHUTDOWN & SANITIZING                                             *
@@ -478,22 +506,40 @@ user_pref("privacy.history.custom", true);
 // [3] https://github.com/yokoffing/Betterfox/issues/272
 //user_pref("privacy.sanitize.sanitizeOnShutdown", true);

-// Uncomment individual prefs to disable clearing on shutdown:
+// PREF: sanitize on shutdown: no site exceptions | v2 migration [FF128+]
 // [NOTE] If "history" is true, downloads will also be cleared.
-// [NOTE] Even if "downloads" pref is enabled, downloads won't be cleared unless "history" is set to true!
-//user_pref("privacy.clearOnShutdown.history", true); // [DEFAULT]
-    //user_pref("privacy.clearOnShutdown.downloads", true);
+//user_pref("privacy.clearOnShutdown.cache", true); // [DEFAULT]
+//user_pref("privacy.clearOnShutdown_v2.cache", true); // [FF128+] [DEFAULT]
+//user_pref("privacy.clearOnShutdown.downloads", true); // [DEFAULT]
 //user_pref("privacy.clearOnShutdown.formdata", true);  // [DEFAULT]
-//user_pref("privacy.clearOnShutdown.sessions", true); // [DEFAULT]
-//user_pref("privacy.clearOnShutdown.offlineApps", true);
-//user_pref("privacy.clearOnShutdown.siteSettings", false); // [DEFAULT]
+//user_pref("privacy.clearOnShutdown.history", true);   // [DEFAULT]
+//user_pref("privacy.clearOnShutdown_v2.historyFormDataAndDownloads", true); // [FF128+] [DEFAULT]
+    //user_pref("privacy.clearOnShutdown.siteSettings", false); // [DEFAULT]
+    //user_pref("privacy.clearOnShutdown_v2.siteSettings", false); // [FF128+] [DEFAULT]
+
+// PREF: set Session Restore to clear on shutdown [FF34+]
+// [NOTE] Not needed if Session Restore is not used or it is already cleared with history (2811)
+// [NOTE] However, if true, this pref prevents resuming from crashes.
+//user_pref("privacy.clearOnShutdown.openWindows", true);
+
+// PREF: sanitize on shutdown: respects allow site exceptions | v2 migration [FF128+]
+// Set cookies, site data, cache, etc. to clear on shutdown.
+// [SETTING] Privacy & Security>History>Custom Settings>Clear history when Firefox closes>Settings
+// [NOTE] "sessions": Active Logins (has no site exceptions): refers to HTTP Basic Authentication [1], not logins via cookies.
+// [NOTE] "offlineApps": Offline Website Data: localStorage, service worker cache, QuotaManager (IndexedDB, asm-cache).
+// Clearing "offlineApps" may affect login items after browser restart.
+// [1] https://en.wikipedia.org/wiki/Basic_access_authentication
+//user_pref("privacy.clearOnShutdown.cookies", true); // Cookies
+//user_pref("privacy.clearOnShutdown.offlineApps", true); // Site Data
+//user_pref("privacy.clearOnShutdown.sessions", true);  // Active Logins [DEFAULT]
+//user_pref("privacy.clearOnShutdown_v2.cookiesAndStorage", true); // Cookies, Site Data, Active Logins [FF128+]

 // PREF: configure site exceptions
-// [NOTE] Currently, there is no way to add sites via about:config
-// [SETTING] to manage site exceptions: Options>Privacy & Security>Cookies & Site Data>Manage Exceptions
-// or when on the website in question: Ctrl+I>Permissions>Cookies>Allow 
-// For cross-domain logins, add exceptions for both sites:
-// e.g. https://www.youtube.com (site) + https://accounts.google.com (single sign on)
+// [NOTE] Currently, there is no way to add sites via about:config.
+// [SETTING] to add site exceptions: Ctrl+I>Permissions>Cookies>Allow (when on the website in question)
+// [SETTING] To manage site exceptions: Options>Privacy & Security>Cookies & Site Data>Manage Exceptions
+// [NOTE] Exceptions: A "cookie" permission also controls "offlineApps" (see note below). For cross-domain logins,
+// add exceptions for both sites e.g. https://www.youtube.com (site) + https://accounts.google.com (single sign on)
 // [WARNING] Be selective with what cookies you keep, as they also disable partitioning [1]
 // [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1767271

@@ -501,8 +547,9 @@ user_pref("privacy.history.custom", true);
 * SECTION: SEARCH / URL BAR                                                 *
 ******************************************************************************/

-// PREF: trim certain parts of the URL
+// PREF: darken certain parts of the URL [FF75+]
 // Makes the domain name more prominent by graying out other parts of the URL.
+// Also hidse https:// and www parts from the suggestion URL.
 // [1] https://udn.realityripple.com/docs/Mozilla/Preferences/Preference_reference/browser.urlbar.trimURLs
 // [2] https://winaero.com/firefox-75-strips-https-and-www-from-address-bar-results/
 //user_pref("browser.urlbar.trimURLs", true); // DEFAULT
@@ -514,26 +561,25 @@ user_pref("privacy.history.custom", true);
 // so it's not like we need to see https. It's not a privacy issue, so you can add to your overrides.
 // [TEST] http://www.http2demo.io/
 // [1] https://www.ghacks.net/2023/09/19/firefox-119-will-launch-with-an-important-address-bar-change/
-//user_pref("browser.urlbar.trimHttps", true);
+user_pref("browser.urlbar.trimHttps", true);
+user_pref("browser.urlbar.untrimOnUserInteraction.featureGate", true);

 // PREF: display "Not Secure" text on HTTP sites
 // Needed with HTTPS-First Policy; not needed with HTTPS-Only Mode.
-user_pref("security.insecure_connection_text.enabled", true);
-user_pref("security.insecure_connection_text.pbmode.enabled", true);
+//user_pref("security.insecure_connection_text.enabled", true); // [DEFAULT FF136+]
+//user_pref("security.insecure_connection_text.pbmode.enabled", true); // [DEFAULT FF136+]

-// PREF: do not show search terms in URL bar [FF110+] [FF113+]
+// PREF: do not show search terms in URL bar [FF110+]
 // Show search query instead of URL on search results pages.
 // [SETTING] Search>Search Bar>Use the address bar for search and navigation>Show search terms instead of URL...
 //user_pref("browser.urlbar.showSearchTerms.enabled", false);
+    //user_pref("browser.urlbar.showSearchTerms.featureGate", false); // DEFAULT

 // PREF: enable seperate search engine for Private Windows
 // [SETTINGS] Preferences>Search>Default Search Engine>"Use this search engine in Private Windows"
 user_pref("browser.search.separatePrivateDefault.ui.enabled", true);
 // [SETTINGS] "Choose a different default search engine for Private Windows only"
-//user_pref("browser.search.separatePrivateDefault", true); // DEFAULT
-// enable prompt for searching in a Private Window when using normal browsing window URL bar
-// [1] https://www.reddit.com/r/firefox/comments/yg8jyh/different_private_search_option_gone_firefox_106/
-//user_pref("browser.search.separatePrivateDefault.urlbarResult.enabled", true); // HIDDEN
+    //user_pref("browser.search.separatePrivateDefault", true); // DEFAULT

 // PREF: enable option to add custom search engine
 // [SETTINGS] Settings -> Search -> Search Shortcuts -> Add
@@ -549,15 +595,18 @@ user_pref("browser.urlbar.update2.engineAliasRefresh", true); // HIDDEN
 // [SETTING] Search>Provide search suggestions > Show search suggestions in address bar result
 user_pref("browser.search.suggest.enabled", false);
    //user_pref("browser.search.suggest.enabled.private", false); // DEFAULT
-user_pref("browser.urlbar.suggest.searches", false);
+
+// PREF: disable Show recent searches
+// [SETTING] Search > Search Suggestions > Show recent searches 
+//user_pref("browser.urlbar.suggest.recentsearches", false);

 // PREF: disable Firefox Suggest
 // [1] https://github.com/arkenfox/user.js/issues/1257
-//user_pref("browser.urlbar.quicksuggest.enabled", false); // controls whether the UI is shown
-user_pref("browser.urlbar.suggest.quicksuggest.sponsored", false);
-user_pref("browser.urlbar.suggest.quicksuggest.nonsponsored", false);
+user_pref("browser.urlbar.quicksuggest.enabled", false); // controls whether the UI is shown
+    //user_pref("browser.urlbar.suggest.quicksuggest.sponsored", false); // [FF92+] 
+    //user_pref("browser.urlbar.suggest.quicksuggest.nonsponsored", false); // [FF95+]
 // hide Firefox Suggest label in URL dropdown box
-//user_pref("browser.urlbar.groupLabels.enabled", false);
+user_pref("browser.urlbar.groupLabels.enabled", false);

 // PREF: disable search and form history
 // Be aware that autocomplete form data can be read by third parties [1][2].
@@ -613,9 +662,10 @@ 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
-user_pref("dom.security.https_first", true);
-//user_pref("dom.security.https_first_pbm", true); // DEFAULT
-user_pref("dom.security.https_first_schemeless", true); // [FF120+]
+// [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+]

 /******************************************************************************
 * SECTION: HTTPS-ONLY MODE                              *
@@ -643,9 +693,8 @@ user_pref("dom.security.https_first_schemeless", true); // [FF120+]
 //user_pref("dom.security.https_only_mode", true); // Normal + Private Browsing windows

 // PREF: offer suggestion for HTTPS site when available
-// [1] https://twitter.com/leli_gibts_scho/status/1371463866606059528
-// [TEST] http://speedofanimals.com/
-user_pref("dom.security.https_only_mode_error_page_user_suggestions", true);
+// [1] https://x.com/leli_gibts_scho/status/1371463866606059528
+//user_pref("dom.security.https_only_mode_error_page_user_suggestions", true);

 // PREF: HTTP background requests in HTTPS-only Mode
 // When attempting to upgrade, if the server doesn't respond within 3 seconds[=default time],
@@ -671,7 +720,8 @@ user_pref("dom.security.https_only_mode_error_page_user_suggestions", true);
 // [SETTINGS] Privacy & Security > DNS over HTTPS > Enable secure DNS using:
 // [NOTE] Mode 3 has site-exceptions with a nice UI on the error page.
 // [1] https://hacks.mozilla.org/2018/05/a-cartoon-intro-to-dns-over-https/
-// [2] https://support.mozilla.org/en-US/kb/dns-over-https#w_protection-levels-explained
+// [2] https://wiki.mozilla.org/Security/DOH-resolver-policy
+// [3] https://support.mozilla.org/en-US/kb/dns-over-https#w_protection-levels-explained
 // 0= Default Protection: Firefox decides when to use secure DNS (default)
 // 2= Increased Protection: use DoH and fall back to native DNS if necessary
 // 3= Max Protection: only use DoH; do not fall back to native DNS
@@ -719,9 +769,9 @@ user_pref("dom.security.https_only_mode_error_page_user_suggestions", true);

 // PREF: assorted options
 //user_pref("network.trr.confirmationNS", "skip"); // skip undesired DOH test connection
-//user_pref("network.trr.skip-AAAA-when-not-supported", true); // DEFAULT; If Firefox detects that your system does not have IPv6 connectivity, it will not request IPv6 addresses from the DoH server
-//user_pref("network.trr.clear-cache-on-pref-change", true); // DEFAULT; DNS+TRR cache will be cleared when a relevant TRR pref changes
-//user_pref("network.trr.wait-for-portal", false); // DEFAULT; set this to true to tell Firefox to wait for the captive portal detection before TRR is used
+//user_pref("network.trr.skip-AAAA-when-not-supported", true); // [DEFAULT] If Firefox detects that your system does not have IPv6 connectivity, it will not request IPv6 addresses from the DoH server
+//user_pref("network.trr.clear-cache-on-pref-change", true); // [DEFAULT] DNS+TRR cache will be cleared when a relevant TRR pref changes
+//user_pref("network.trr.wait-for-portal", false); // [DEFAULT] set this to true to tell Firefox to wait for the captive portal detection before TRR is used

 // PREF: DOH exlcusions
 //user_pref("network.trr.excluded-domains", ""); // DEFAULT; comma-separated list of domain names to be resolved using the native resolver instead of TRR. This pref can be used to make /etc/hosts works with DNS over HTTPS in Firefox.
@@ -793,7 +843,6 @@ user_pref("dom.security.https_only_mode_error_page_user_suggestions", true);
 // [NOTE] This does not clear any passwords already saved.
 // [SETTING] Privacy & Security>Logins and Passwords>Ask to save logins and passwords for websites
 //user_pref("signon.rememberSignons", false);
-    //user_pref("signon.rememberSignons.visibilityToggle", true); // DEFAULT
    //user_pref("signon.schemeUpgrades", true); // DEFAULT
    //user_pref("signon.showAutoCompleteFooter", true); // DEFAULT
    //user_pref("signon.autologin.proxy", false); // DEFAULT
@@ -841,10 +890,11 @@ 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
@@ -871,68 +921,65 @@ user_pref("editor.truncate_user_pastes", false);
 * SECTION: MIXED CONTENT + CROSS-SITE                                       *
 ******************************************************************************/

-// [TEST] https://mixed-script.badssl.com/
-
-// PREF: disable automatic authentication on Microsoft sites [WINDOWS]
-// [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1695693,1719301
-//user_pref("network.http.windows-sso.enabled", false);
-
-// PREF: block insecure active content (scripts) on HTTPS pages
-// [1] https://trac.torproject.org/projects/tor/ticket/21323
-//user_pref("security.mixed_content.block_active_content", true); // DEFAULT
-
 // PREF: block insecure passive content (images) on HTTPS pages
-// Using HTTPS First Policy, Firefox will still make a HTTP connection
-// if it can't find a secure connection, so this isn't redundant.
-// There's the small chance that someone does a MITM on the images
-// and deploys a malicious image. (They're rare, but possible).
-// [NOTE] You can remove if using HTTPS-Only Mode.
+// [WARNING] This preference blocks all mixed content, including upgradable.
+// Firefox still attempts an HTTP connection if it can't find a secure one,
+// even with HTTPS First Policy. Although rare, this leaves a small risk of
+// a malicious image being served through a MITM attack.
+// Disable this pref if using HTTPS-Only Mode.
+// [NOTE] Enterprise users may need to enable this setting [1].
+// [1] https://blog.mozilla.org/security/2024/06/05/firefox-will-upgrade-more-mixed-content-in-version-127/
 user_pref("security.mixed_content.block_display_content", true);

-// PREF: upgrade passive content to use HTTPS on secure pages
-// [NOTE] You can remove if using HTTPS-Only Mode.
-user_pref("security.mixed_content.upgrade_display_content", true);
-// [FF119+]:
-//user_pref("security.mixed_content.upgrade_display_content.audio", true); // DEFAULT
-user_pref("security.mixed_content.upgrade_display_content.image", true);
-//user_pref("security.mixed_content.upgrade_display_content.video", true); // DEFAULT
-
-// PREF: block insecure downloads from secure sites
-// [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1660952
-//user_pref("dom.block_download_insecure", true); // DEFAULT
-
 // PREF: allow PDFs to load javascript
 // https://www.reddit.com/r/uBlockOrigin/comments/mulc86/firefox_88_now_supports_javascript_in_pdf_files/
 user_pref("pdfjs.enableScripting", false);

-// PREF: limit allowed extension directories
-// The pref value represents the sum: e.g. 5 would be profile and application directories.
-// [WARNING] Breaks usage of files which are installed outside allowed directories.
-// [1] https://archive.is/DYjAM
-// 1=profile, 2=user, 4=application, 8=system, 16=temporary, 31=all
-//user_pref("extensions.enabledScopes", 5); // [HIDDEN PREF] DEFAULT
-  // user_pref("extensions.autoDisableScopes", 15); // [DEFAULT: 15]
-
-// PREF: disable bypassing 3rd party extension install prompts
-// [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1659530,1681331
-user_pref("extensions.postDownloadThirdPartyPrompt", false);
-
 // PREF: disable middle click on new tab button opening URLs or searches using clipboard [FF115+]
 // Enable if you're using LINUX.
 //user_pref("browser.tabs.searchclipboardfor.middleclick", false); // DEFAULT WINDOWS macOS

-// PREF: enforce TLS 1.0 and 1.1 downgrades as session only
-//user_pref("security.tls.version.enable-deprecated", false); // DEFAULT
+// PREF: disable automatic authentication on Microsoft sites [WINDOWS]
+// [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1695693,1719301
+//user_pref("network.http.windows-sso.enabled", false);

-// PREF: enable (limited but sufficient) window.opener protection
-// Makes rel=noopener implicit for target=_blank in anchor and area elements when no rel attribute is set.
-// [1] https://jakearchibald.com/2016/performance-benefits-of-rel-noopener/
-//user_pref("dom.targetBlankNoOpener.enabled", true); // DEFAULT
+/****************************************************************************
+ * SECTION: EXTENSIONS                                                      *
+****************************************************************************/

-// PREF: enable "window.name" protection
-// If a new page from another domain is loaded into a tab, then window.name is set to an empty string. The original
-// string is restored if the tab reverts back to the original page. This change prevents some cross-site attacks.
-//user_pref("privacy.window.name.update.enabled", true); // DEFAULT
+// PREF: limit allowed extension directories
+// 1=profile, 2=user, 4=application, 8=system, 16=temporary, 31=all
+// The pref value represents the sum: e.g. 5 would be profile and application directories.
+// [WARNING] Breaks usage of files which are installed outside allowed directories.
+// [1] https://archive.is/DYjAM
+user_pref("extensions.enabledScopes", 5); // [HIDDEN PREF]
+    //user_pref("extensions.autoDisableScopes", 15); // [DEFAULT: 15]
+
+// PREF: skip 3rd party panel when installing recommended addons [FF82+]
+// [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1659530,1681331
+//user_pref("extensions.postDownloadThirdPartyPrompt", false);
+
+// PREF: disable mozAddonManager Web API [FF57+]
+// [NOTE] To allow extensions to work on AMO, you also need extensions.webextensions.restrictedDomains.
+// [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1384330,1406795,1415644,1453988
+//user_pref("privacy.resistFingerprinting.block_mozAddonManager", true);
+
+// PREF: disable webextension restrictions on Mozilla domains [FF60+]
+// [1] https://www.reddit.com/r/firefox/comments/n1lpaf/make_addons_work_on_mozilla_sites/gwdy235/?context=3
+// [2] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1384330,1406795,1415644,1453988
+//user_pref("extensions.webextensions.restrictedDomains", "");
+
+// PREF: do not require signing for extensions [ESR/DEV/NIGHTLY ONLY]
+// [1] https://support.mozilla.org/en-US/kb/add-on-signing-in-firefox#w_what-are-my-options-if-i-want-to-use-an-unsigned-add-on-advanced-users
+//user_pref("xpinstall.signatures.required", false);
+
+// PREF: disable Quarantined Domains [FF115+]
+// 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
+// [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);

 /******************************************************************************
 * SECTION: HEADERS / REFERERS                                               *
@@ -1004,9 +1051,16 @@ user_pref("privacy.userContext.ui.enabled", true);

 // PREF: set behavior on "+ Tab" button to display container menu on left click [FF74+]
 // [NOTE] The menu is always shown on long press and right click.
-// [SETTING] General>Tabs>Enable Container Tabs>Settings>Select a container for each new tab ***/
+// [SETTING] General>Tabs>Enable Container Tabs>Settings>Select a container for each new tab
 //user_pref("privacy.userContext.newTabContainerOnLeftClick.enabled", true);

+// PREF: set external links to open in site-specific containers [FF123+]
+// Depending on your container extension(s) and their settings:
+// true=Firefox will not choose a container (so your extension can)
+// false=Firefox will choose the container/no-container (default)
+// [1] https://bugzilla.mozilla.org/1874599
+    //user_pref("browser.link.force_default_user_context_id_for_external_opens", true);
+
 /******************************************************************************
 * SECTION: WEBRTC                                                           *
 ******************************************************************************/
@@ -1023,13 +1077,14 @@ user_pref("privacy.userContext.ui.enabled", true);
 //user_pref("privacy.webrtc.globalMuteToggles", true);

 // PREF: force WebRTC inside the proxy [FF70+]
-user_pref("media.peerconnection.ice.proxy_only_if_behind_proxy", true);
+//user_pref("media.peerconnection.ice.proxy_only_if_behind_proxy", true);

 // PREF: force a single network interface for ICE candidates generation [FF42+]
 // When using a system-wide proxy, it uses the proxy interface.
 // [1] https://developer.mozilla.org/en-US/docs/Web/API/RTCIceCandidate
 // [2] https://wiki.mozilla.org/Media/WebRTC/Privacy
-user_pref("media.peerconnection.ice.default_address_only", true);
+// [3] https://github.com/zen-browser/desktop/issues/972
+//user_pref("media.peerconnection.ice.default_address_only", true);

 // PREF: force exclusion of private IPs from ICE candidates [FF51+]
 // [SETUP-HARDEN] This will protect your private IP even in TRUSTED scenarios after you
@@ -1066,12 +1121,6 @@ user_pref("media.peerconnection.ice.default_address_only", true);
 * SECTION: VARIOUS                                                          *
 ******************************************************************************/

-// PREF: enable FTP protocol
-// Firefox redirects any attempt to load a FTP resource.
-// to the default search engine if the FTP protocol is disabled.
-// [1] https://www.ghacks.net/2018/02/20/firefox-60-with-new-preference-to-disable-ftp/
-//user_pref("network.ftp.enabled", true);
-
 // PREF: decode URLs in other languages
 // [WARNING] Causes unintended consequences when copy+paste links with underscores.
 // [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1320061
@@ -1081,6 +1130,39 @@ user_pref("media.peerconnection.ice.default_address_only", 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)                                               *
 ******************************************************************************/
@@ -1167,12 +1249,10 @@ user_pref("browser.safebrowsing.downloads.remote.enabled", false);
    //user_pref("identity.fxaccounts.autoconfig.uri", "");

 // PREF: disable Firefox View [FF106+]
+// You can no longer disable Firefox View as of [FF127+].
+// To hide the icon from view, see [2].
 // [1] https://support.mozilla.org/en-US/kb/how-set-tab-pickup-firefox-view#w_what-is-firefox-view
-//user_pref("browser.tabs.firefox-view", false);
-//user_pref("browser.tabs.firefox-view-next", false); // [FF119+]
-//user_pref("browser.tabs.firefox-view-newIcon", false); // [FF119+]
-    //user_pref("browser.firefox-view.search.enabled", false); // [FF122+]
-    //user_pref("browser.firefox-view.virtual-list.enabled", false); // [FF122+]
+// [2] https://support.mozilla.org/en-US/kb/how-set-tab-pickup-firefox-view#w_how-do-i-remove-firefox-view-from-the-tabs-bar

 // PREF: disable the Firefox View tour from popping up
 //user_pref("browser.firefox-view.feature-tour", "{\"screen\":\"\",\"complete\":true}");
@@ -1193,19 +1273,25 @@ 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
 // 0=always ask (default), 1=allow, 2=block
 user_pref("permissions.default.geo", 2);

-// PREF: use Mozilla geolocation service instead of Google when geolocation is enabled
-user_pref("geo.provider.network.url", "https://location.services.mozilla.com/v1/geolocate?key=%MOZILLA_API_KEY%");
+// PREF: use alternative geolocation service instead of Google
+// [NOTE] Mozilla's geolocation service was discontinued in June 2024 [1].
+// BeaconDB is its replacement.
+// [1] https://github.com/mozilla/ichnaea/issues/2065
+// [2] https://codeberg.org/beacondb/beacondb
+// [3] https://github.com/yokoffing/Betterfox/issues/378
+user_pref("geo.provider.network.url", "https://beacondb.net/v1/geolocate");

 // PREF: disable using the OS's geolocation service
 //user_pref("geo.provider.ms-windows-location", false); // [WINDOWS]
 //user_pref("geo.provider.use_corelocation", false); // [MAC]
-//user_pref("geo.provider.use_gpsd", false); // [LINUX] broken on Linux?
 //user_pref("geo.provider.use_geoclue", false); // [FF102+] [LINUX]

 // PREF: logging geolocation to the console
@@ -1231,38 +1317,20 @@ user_pref("geo.provider.network.url", "https://location.services.mozilla.com/v1/
 //user_pref("extensions.update.enabled", false);

 // PREF: disable search engine updates (e.g. OpenSearch)
+// Prevent Firefox from adding back search engines after you removed them.
 // [NOTE] This does not affect Mozilla's built-in or Web Extension search engines.
-//user_pref("browser.search.update", false);
+user_pref("browser.search.update", false);

-// PREF: remove special permissions for certain mozilla domains
+// PREF: remove special permissions for certain mozilla domains [FF35+]
 // default = resource://app/defaults/permissions
-//user_pref("permissions.manager.defaultsUrl", "");
+user_pref("permissions.manager.defaultsUrl", "");

 // PREF: remove webchannel whitelist
-user_pref("webchannel.allowObject.urlWhitelist", "");
+//user_pref("webchannel.allowObject.urlWhitelist", ""); // [DEFAULT FF132+]

-// PREF: disable mozAddonManager Web API [FF57+]
-// [NOTE] To allow extensions to work on AMO, you also need extensions.webextensions.restrictedDomains.
-// [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1384330,1406795,1415644,1453988
-//user_pref("privacy.resistFingerprinting.block_mozAddonManager", true); // [HIDDEN PREF FF57-108]
-
-// PREF: disable webextension restrictions on Mozilla domains
-// [NOTE] May only work with PREF: privacy.resistfingerprinting enabled and/or DEV/NIGHTLY-only?
-// [1] https://www.reddit.com/r/firefox/comments/n1lpaf/make_addons_work_on_mozilla_sites/gwdy235/?context=3
-// [2] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1384330,1406795,1415644,1453988
-//user_pref("extensions.webextensions.restrictedDomains", "");
-
-// PREF: do not require signing for extensions [ESR/DEV/NIGHTLY ONLY]
-// [1] https://support.mozilla.org/en-US/kb/add-on-signing-in-firefox#w_what-are-my-options-if-i-want-to-use-an-unsigned-add-on-advanced-users
-//user_pref("xpinstall.signatures.required", false);
-
-// PREF: disable Quarantined Domains [FF115+]
-// 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
-// [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);
+// 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                                                   *
@@ -1282,7 +1350,7 @@ user_pref("datareporting.healthreport.uploadEnabled", false);
 // - If "unified" is true then "enabled" only controls whether to record extended data
 // [NOTE] "toolkit.telemetry.enabled" is now LOCKED to reflect prerelease (true) or release builds (false) [2]
 // [1] https://firefox-source-docs.mozilla.org/toolkit/components/telemetry/telemetry/internals/preferences.html
-// [2] https://medium.com/georg-fritzsche/data-preference-changes-in-firefox-58-2d5df9c428b5 ***/
+// [2] https://medium.com/georg-fritzsche/data-preference-changes-in-firefox-58-2d5df9c428b5
 user_pref("toolkit.telemetry.unified", false);
 user_pref("toolkit.telemetry.enabled", false); // see [NOTE]
 user_pref("toolkit.telemetry.server", "data:,");
@@ -1304,6 +1372,9 @@ user_pref("toolkit.coverage.endpoint.base", "");
 user_pref("browser.newtabpage.activity-stream.feeds.telemetry", false);
 user_pref("browser.newtabpage.activity-stream.telemetry", false);

+// PREF: disable daily active users [FF136+]
+user_pref("datareporting.usage.uploadEnabled", false);
+
 /******************************************************************************
 * SECTION: EXPERIMENTS                                                      *
 ******************************************************************************/
@@ -1329,22 +1400,32 @@ user_pref("browser.tabs.crashReporting.sendReport", false);

 // PREF: enforce no submission of backlogged crash reports
 // [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to send backlogged crash reports
-user_pref("browser.crashReports.unsubmittedCheck.autoSubmit2", false);
+//user_pref("browser.crashReports.unsubmittedCheck.autoSubmit2", false); // [DEFAULT FF132+]

 /******************************************************************************
 * SECTION: DETECTION                                                        *
 ******************************************************************************/

 // 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("network.captive-portal-service.enabled", false);
+//user_pref("captivedetect.canonicalURL", "");
+//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.
+// [SETTING] Privacy & Security>Website Advertising Preferences>Allow websites to perform privacy-preserving ad measurement
+// [1] https://support.mozilla.org/kb/privacy-preserving-attribution
+// [2] https://searchfox.org/mozilla-central/rev/f3e4b33a6122ce63bf81ae8c30cc5ac37458864b/dom/privateattribution/PrivateAttributionService.sys.mjs#267
+//user_pref("dom.private-attribution.submission.enabled", false);
+    //user_pref("toolkit.telemetry.dap_helper", ""); // [OPTIONAL HARDENING]
+    //user_pref("toolkit.telemetry.dap_leader", ""); // [OPTIONAL HARDENING]

 // PREF: software that continually reports what default browser you are using [WINDOWS]
 // [WARNING] Breaks "Make Default..." button in Preferences to set Firefox as the default browser [2].
@@ -1357,12 +1438,10 @@ user_pref("network.connectivity-service.enabled", false);

 // PREF: SERP Telemetry [FF125+]
 // [1] https://blog.mozilla.org/en/products/firefox/firefox-search-update/
-//user_pref("browser.search.serpEventTelemetry.enabled", false); // [removed in FF128?]
 //user_pref("browser.search.serpEventTelemetryCategorization.enabled", false);

 // PREF: assorted telemetry
-// [NOTE] Shouldn't be needed for user.js, but browser forks
-// may want to disable these prefs.
+// [NOTE] Shouldn't be needed for user.js, but browser forks may want to disable these prefs.
 //user_pref("doh-rollout.disable-heuristics", true); // ensure DoH doesn't get enabled automatically
 //user_pref("dom.security.unexpected_system_load_telemetry_enabled", false);
 //user_pref("messaging-system.rsexperimentloader.enabled", false);
@@ -1372,7 +1451,5 @@ user_pref("network.connectivity-service.enabled", false);
 //user_pref("security.certerrors.recordEventTelemetry", false);
 //user_pref("security.protectionspopup.recordEventTelemetry", false);
 //user_pref("signon.recipes.remoteRecipes.enabled", false);
-//user_pref("security.identitypopup.recordEventTelemetry", false); // ESR only; removed FF116+ [1]
-// [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1837979
 //user_pref("privacy.trackingprotection.emailtracking.data_collection.enabled", false);
 //user_pref("messaging-system.askForFeedback", true); // DEFAULT [FF120+]
@@ -3,7 +3,7 @@
 * Smoothfox                                                                            *
 * "Faber est suae quisque fortunae"                                                    *
 * priority: better scrolling                                                           *
- * version: 126                                                                         *
+ * version: 137                                                                       *
 * url: https://github.com/yokoffing/Betterfox                                          *
 ***************************************************************************************/

@@ -17,7 +17,7 @@
 // only sharpen scrolling
 user_pref("apz.overscroll.enabled", true); // DEFAULT NON-LINUX
 user_pref("general.smoothScroll", true); // DEFAULT
-user_pref("mousewheel.min_line_scroll_amount", 10); // 10-40; adjust this number to your liking; default=5
+user_pref("mousewheel.min_line_scroll_amount", 10); // adjust this number to your liking; default=5
 user_pref("general.smoothScroll.mouseWheel.durationMinMS", 80); // default=50
 user_pref("general.smoothScroll.currentVelocityWeighting", "0.15"); // default=.25
 user_pref("general.smoothScroll.stopDecelerationWeighting", "0.6"); // default=.4
@@ -58,8 +58,8 @@ user_pref("general.smoothScroll.msdPhysics.enabled", true);
 user_pref("general.smoothScroll.msdPhysics.motionBeginSpringConstant", 600);
 user_pref("general.smoothScroll.msdPhysics.regularSpringConstant", 650);
 user_pref("general.smoothScroll.msdPhysics.slowdownMinDeltaMS", 25);
-user_pref("general.smoothScroll.msdPhysics.slowdownMinDeltaRatio", 2);
+user_pref("general.smoothScroll.msdPhysics.slowdownMinDeltaRatio", "2");
 user_pref("general.smoothScroll.msdPhysics.slowdownSpringConstant", 250);
-user_pref("general.smoothScroll.currentVelocityWeighting", 1);
-user_pref("general.smoothScroll.stopDecelerationWeighting", 1);
+user_pref("general.smoothScroll.currentVelocityWeighting", "1");
+user_pref("general.smoothScroll.stopDecelerationWeighting", "1");
 user_pref("mousewheel.default.delta_multiplier_y", 300); // 250-400; adjust this number to your liking
@@ -0,0 +1,287 @@
+#!/usr/bin/env python3
+
+from datetime import datetime
+from os import name, getenv
+from json import loads
+from re import compile, IGNORECASE, sub
+from pathlib import Path
+from configparser import ConfigParser
+from argparse import ArgumentParser
+from shutil import copytree, ignore_patterns
+from urllib.request import urlopen
+from subprocess import check_output
+from io import BytesIO
+from zipfile import ZipFile
+
+"""
+install(-betterfox).py
+
+Usage:
+    python install.py
+    
+
+When called without arguments, it will:
+- Backup your current firefox profile
+- Automatically download user.js from the latest Betterfox release compatible with your Firefox version into the profile
+- Apply user-overrides in the same directory 
+
+However, you can check out install.py/betterfox-install.exe --help to customise most behaviours!
+
+Limitations:
+- When using a different repositoy as a source, that repository needs to use the same releases workflow
+- Over time, the get_releases might not list older releases due to limited page size. This can be expanded down the road, though
+
+Building into an exe (on Windows):
+- pipx install pyinstaller  (note: you can try without pipx, but this didn't work for me)
+- Run:
+  - CMD:  `pyinstaller --onefile --name install-betterfox install.py && move %cd%\\dist\\install-betterfox.exe %cd% && del install-betterfox.spec && rmdir /S /Q build && rmdir dist`
+  - BASH: `pyinstaller --onefile --name install-betterfox install.py && && mv dist/install-betterfox.exe . && rm install-betterfox.spec && rm -rf ./build/ && rmdir dist`
+  (Sorry, didn't want to add a .gitignore solely for the install script)
+- Done!
+
+If there's any problems with the script, feel free to mention @Denperidge on GitHub!
+"""
+
+re_find_version = compile(r"mozilla.org/.*?/firefox/(?P<version>[\d.]*?)/", IGNORECASE)
+re_find_overrides = r"(overrides|prefs).*\n(?P<space>\n)"
+
+INSTALLATIONS_TO_CHECK = [
+    # windows
+    {
+        "command": [str(Path("C:/Program Files/Mozilla Firefox/firefox"))],
+        "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(),
+    },
+]
+
+
+# command is a list, eg. ["firefox"] or ["flatpak", "run", "org.mozilla.firefox"]
+def _get_firefox_version(command):
+    ver_string = check_output(command + ["--version"], encoding="UTF-8")
+    return ver_string[ver_string.rindex(" ")+1:].strip()
+
+def _get_default_firefox_version_and_root():
+    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}...")
+
+    config_parser = ConfigParser(strict=False)
+    config_parser.read(config_path)
+
+    path = None
+    for section in config_parser.sections():
+        if "Default" in config_parser[section]:
+            section_default_value = config_parser[section]["Default"]
+            if section_default_value:
+                print("Default detected from section: " + section)
+                # Confirm whether a 0 value is possible, keep fallback until then                 
+                if section_default_value == "0":
+                    continue
+                if section_default_value == "1":
+                    path = config_parser[section]["Path"]
+                else:
+                    path = section_default_value
+                break
+    
+    if path is not None:
+        return firefox_root.joinpath(path)
+    else:
+        raise Exception("Could not determine default Firefox profile! Exiting...")
+
+def _get_releases(repository_owner, repository_name):
+    releases = []
+    raw_releases = loads(urlopen(f"https://api.github.com/repos/{repository_owner}/{repository_name}/releases").read())
+    for raw_release in raw_releases:
+        name = raw_release["name"] or raw_release["tag_name"]  # or fixes 126.0 not being lodaded
+        body = raw_release["body"]
+
+
+        # Find which firefox releases are supported. Manual overrides for ones that don't have it written in their thing!
+        if name == "user.js v.122.1":
+            supported = ["107.0", "107.1", "108.0", "108.0.1", "108.0.2", "109.0", "109.0", "110.1", "110.0.1", "111.0", "111.0.1", "112.0", "112.0.1", "112.0.2", "113.0", "113.0.1", "113.0.2", "114.0", "114.0.1", "114.0.2", "115.0", "115.0.1", "115.0.2", "115.0.3", "115.1.0", "115.10.0", "115.11.0", "115.12.0", "115.13.0", "115.14.0", "115.15.0", "115.16.0", "115.16.1", "115.17.0", "115.2.0", "115.2.1", "115.3.0", "115.3.1", "115.4.0", "115.5.0", "115.6.0", "115.7.0", "115.8.0", "115.9.0", "115.9.1", "116.0", "116.0.1", "116.0.2", "116.0.3", "117.0", "117.0.1", "118.0", "118.0.1", "118.0.2", "119.0", "119.0.1", "120.0", "120.0.1", "121.0", "121.0.1", "122.0", "122.0.1"]
+        elif name == "user.js 116.1":
+            supported = ["116.0", "116.0.1", "116.0.2", "116.0.3"]
+        elif name == "Betterfox v.107":
+            supported = ["107.0"]
+        elif "firefox release" in body.lower():
+            trim_body = body.lower()[body.lower().index("firefox release"):]
+            supported = re_find_version.findall(trim_body)
+            if len(supported) == 0:
+                print(f"Could not parse release in '{name}'. Please post this error message on https://github.com/{repository_owner}/{repository_name}/issues")
+                continue
+        else:
+            print(f"Could not find firefox release header '{name}'. Please post this error message on https://github.com/{repository_owner}/{repository_name}/issues")
+            continue
+
+        releases.append({
+            "name": name,
+            "url": raw_release["zipball_url"],
+            "supported": supported,
+        })
+    return releases
+
+def _get_latest_compatible_release(releases):
+    for release in releases:
+        if firefox_version in release["supported"]:
+            return release
+    return None
+
+def backup_profile(src):
+    dest = f"{src}-backup-{datetime.today().strftime('%Y-%m-%d-%H-%M-%S')}"
+    
+    copytree(src, dest, ignore=ignore_patterns("*lock"))
+    print("Backed up profile to " + dest)
+
+
+def download_betterfox(url):
+    data = BytesIO()
+    data.write(urlopen(url).read())
+    return data  
+
+def extract_betterfox(data, profile_folder):
+    zipfile = ZipFile(data)
+    userjs_zipinfo = None
+    for file in zipfile.filelist:
+        if file.filename.endswith("user.js"):
+            userjs_zipinfo = file
+            userjs_zipinfo.filename = Path(userjs_zipinfo.filename).name
+
+    if not userjs_zipinfo:
+        raise BaseException("Could not find user.js!")
+    
+    return zipfile.extract(userjs_zipinfo, profile_folder)
+
+
+def list_releases(releases, only_supported=False, add_index=False):
+    print()
+    print(f"Listing {'compatible' if only_supported else 'all'} Betterfox releases:")
+    if only_supported:
+        print("Use --list-all to view all available releases")
+    else:
+        print(f"Releases marked with '> ' are documented to be compatible with your Firefox version ({firefox_version})")
+    print()
+
+    i = 0
+    for release in releases:
+        supported = firefox_version in release["supported"]
+        if not only_supported or (only_supported and supported):
+            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, firefox_root = _get_default_firefox_version_and_root()
+
+    default_profile_folder = _get_default_profile_folder(firefox_root)
+
+    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"))),
+    
+    
+    advanced = argparser.add_argument_group("Advanced")
+    advanced.add_argument("--betterfox-version", "-bv", default=None, help=f"Which version of Betterfox to install. Defaults to the latest compatible release for your installed Firefox version")
+    advanced.add_argument("--profile-dir", "-p", "-pd", default=default_profile_folder, help=f"Which profile dir to install user.js in. Defaults to {default_profile_folder}")
+    advanced.add_argument("--repository-owner", "-ro", default="yokoffing", help="owner of the Betterfox repository. Defaults to yokoffing")
+    advanced.add_argument("--repository-name", "-rn", default="Betterfox", help="name of the Betterfox repository. Defaults to Betterfox")
+    
+    disable = argparser.add_argument_group("Disable functionality")
+    disable.add_argument("--no-backup", "-nb", action="store_true", default=False, help="disable backup of current profile (not recommended)"),
+    disable.add_argument("--no-install", "-ni", action="store_true", default=False, help="don't install Betterfox"),
+    
+    modes = argparser.add_mutually_exclusive_group()
+    modes.add_argument("--list", action="store_true", default=False, help=f"List all Betterfox releases compatible with your version of Firefox ({firefox_version})")
+    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)
+        _press_enter_to_exit(args)
+        exit()
+
+    if not args.no_backup:
+        backup_profile(args.profile_dir)
+
+    if args.betterfox_version:
+        # If not None AND not string, default value has been used
+        if not isinstance(args.betterfox_version, str):
+            selected_release = args.betterfox_version
+            print(f"Using latest compatible Betterfox version ({selected_release['name']})...")
+        # If string has been passed
+        else:
+            selected_release = next(rel for rel in releases if rel['name'] == args.betterfox_version)
+            print(f"Using manually selected Betterfox version ({selected_release['name']})")
+    
+    if not args.betterfox_version:
+        selected_release = _get_latest_compatible_release(releases)
+        
+    if args.interactive or not selected_release:
+        if not selected_release:
+            print("Could not find a compatible Betterfox version for your Firefox installation.")
+        
+        list_releases(releases, False, True)
+        selection = int(input(f"Select Betterfox version, or press enter without typing a number to cancel [0-{len(releases) - 1}]: "))
+
+        selected_release = releases[selection]
+
+
+
+    if not args.no_install:
+        userjs_path = extract_betterfox(
+            download_betterfox(selected_release["url"]),
+            args.profile_dir
+        )
+        print(f"Installed user.js to {userjs_path} !")
+
+
+        if Path(args.overrides).exists():
+            print("Found overrides at " + str(args.overrides))
+
+            with open(str(args.overrides), "r", encoding="utf-8") as overrides_file:
+                overrides = overrides_file.read()
+            with open(userjs_path, "r", encoding="utf-8") as userjs_file:
+                old_content = userjs_file.read()
+                new_content = sub(re_find_overrides, "\n" + overrides + "\n", old_content, count=1, flags=IGNORECASE)
+            with open(userjs_path, "w", encoding="utf-8") as userjs_file:
+                userjs_file.write(new_content)
+        else:
+            print(f"Found no overrides in {args.overrides}")
+
+    _press_enter_to_exit(args)
+
@@ -1,114 +0,0 @@
-//
-/* You may copy+paste this file and use it as it is.
- *
- * If you make changes to your about:config while the program is running, the
- * changes will be overwritten by this file when the application restarts.
- *
- * To make lasting changes to preferences, you will have to edit this file.
- */
-
-/****************************************************************************
- * Betterfox - LibreWolf overrides                                          *
- * Quis custodiet ipsos custodes                                            *
- * version: August 2023                                                     *
- * url: https://github.com/yokoffing/Betterfox                              *
- * license: https://github.com/yokoffing/Betterfox/blob/main/LICENSE        *
- * README: https://github.com/yokoffing/Betterfox/blob/main/README.md       *
-****************************************************************************/
-
-// Better off just using a user.js file:
-// [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/41963
-// [2] https://github.com/arkenfox/user.js/issues/1695#issuecomment-1666505218
-
-// Where do I find my librewolf.overrides.cfg? https://librewolf.net/docs/settings/#where-do-i-find-my-librewolfoverridescfg
-// LibreWolf default prefs: https://gitlab.com/librewolf-community/settings/-/blob/master/librewolf.cfg
-
-/****************************************************************************
- * SECTION: FASTFOX                                                         *
-****************************************************************************/
-defaultPref("layout.css.grid-template-masonry-value.enabled", true);
-defaultPref("dom.enable_web_task_scheduling", true);
-
-/****************************************************************************
- * SECTION: SECUREFOX                                                       *
-****************************************************************************/
-/** TRACKING PROTECTION ***/
-defaultPref("urlclassifier.trackingSkipURLs", "*.reddit.com, *.twitter.com, *.twimg.com");
-defaultPref("urlclassifier.features.socialtracking.skipURLs", "*.instagram.com, *.twitter.com, *.twimg.com");
-
-/** OCSP & CERTS / HPKP ***/
-// Use CRLite instead of OCSP
-defaultPref("security.OCSP.enabled", 0);
-defaultPref("security.OCSP.require", false);
-defaultPref("security.pki.crlite_mode", 2);
-
-/** RFP ***/
-// Limits refresh rate to 60mHz, breaks timezone, and forced light theme
-// [1] https://librewolf.net/docs/faq/#what-are-the-most-common-downsides-of-rfp-resist-fingerprinting
-defaultPref("privacy.resistFingerprinting", false);
-
-// WebGL
-// Breaks Map sites, NYT articles, Nat Geo, and more
-// [1] https://manu.ninja/25-real-world-applications-using-webgl/
-defaultPref("webgl.disabled", false);
-
-// DRM
-// Netflix, Udemy, Spotify, etc.
-defaultPref("media.eme.enabled", true);
-
-/** HTTPS-ONLY MODE ***/
-defaultPref("dom.security.https_only_mode_error_page_user_suggestions", true);
-
-/** PASSWORDS AND AUTOFILL ***/
-defaultPref("signon.generation.enabled", false);
-
-/** WEBRTC ***/
-// Breaks video conferencing
-defaultPref("media.peerconnection.ice.no_host", false);
-
-/** PERMISSIONS ***/
-defaultPref("permissions.default.geo", 2);
-defaultPref("permissions.default.desktop-notification", 2);
-defaultPref("dom.push.enabled", false);
-
-/****************************************************************************
- * SECTION: PESKYFOX                                                        *
-****************************************************************************/
-/** MOZILLA UI ***/
-defaultPref("layout.css.prefers-color-scheme.content-override", 2);
-defaultPref("toolkit.legacyUserProfileCustomizations.stylesheets", true);
-defaultPref("browser.compactmode.show", true);
-
-/** FULLSCREEN ***/
-defaultPref("full-screen-api.transition-duration.enter", "0 0");
-defaultPref("full-screen-api.transition-duration.leave", "0 0");
-defaultPref("full-screen-api.warning.delay", 0);
-defaultPref("full-screen-api.warning.timeout", 0);
-
-/** URL BAR ***/
-defaultPref("browser.urlbar.suggest.engines", false);
-defaultPref("browser.urlbar.suggest.topsites", false);
-defaultPref("browser.urlbar.suggest.calculator", true);
-defaultPref("browser.urlbar.unitConversion.enabled", true);
-
-/** AUTOPLAY ***/
-// Default breaks some video players
-defaultPref("media.autoplay.blocking_policy", 0);
-
-/** PASSWORDS ***/
-defaultPref("editor.truncate_user_pastes", false);
-
-/** DOWNLOADS ***/
-defaultPref("browser.download.autohideButton", true);
-
-/** PDF ***/
-defaultPref("browser.download.open_pdf_attachments_inline", true);
-
-/** TAB BEHAVIOR ***/
-defaultPref("browser.tabs.loadBookmarksInTabs", true);
-defaultPref("browser.bookmarks.openInTabClosesMenu", false);
-defaultPref("findbar.highlightAll", true);
-
-/****************************************************************************
- * END: BETTERFOX                                                           *
-****************************************************************************/
@@ -19,22 +19,29 @@

 /** 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("urlclassifier.features.socialtracking.skipURLs", "*.twitter.com, *.twimg.com"); // removed *.instagram.com
 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
+user_pref("browser.urlbar.suggest.recentsearches", false);  // unselect "Show recent searches" for clean UI
 user_pref("browser.urlbar.showSearchSuggestionsFirst", false); // unselect "Show search suggestions ahead of browsing history in address bar results" for clean UI
-//user_pref("browser.urlbar.suggest.trending", false); // FF119+ disable showing trending searches; unselect for clean UI
-user_pref("browser.urlbar.groupLabels.enabled", false); // hide Firefox Suggest label in URL dropdown box
+//user_pref("browser.urlbar.groupLabels.enabled", false); // hide Firefox Suggest label in URL dropdown box
 user_pref("signon.management.page.breach-alerts.enabled", false); // extra hardening
 user_pref("signon.autofillForms", false); // unselect "Autofill logins and passwords" for clean UI
 user_pref("signon.generation.enabled", false); // unselect "Suggest and generate strong passwords" for clean UI
 user_pref("signon.firefoxRelay.feature", ""); // unselect suggestions from Firefox Relay for clean UI
-//user_pref("privacy.sanitize.sanitizeOnShutdown", true); // clear browsing data on shutdown
-//user_pref("privacy.clearOnShutdown.offlineApps", true); // clear Site Data on shutdown
 user_pref("browser.safebrowsing.downloads.enabled", false); // deny SB to scan downloads to identify suspicious files; local checks only
 user_pref("browser.safebrowsing.downloads.remote.url", ""); // enforce no remote checks for downloads by SB
 user_pref("browser.safebrowsing.downloads.remote.block_potentially_unwanted", false); // clean up UI; not needed in user.js if remote downloads are disabled
@@ -44,16 +51,11 @@ user_pref("browser.search.update", false); // do not update opensearch engines
 user_pref("network.trr.confirmationNS", "skip"); // skip TRR confirmation request
 user_pref("extensions.webextensions.restrictedDomains", ""); // remove Mozilla domains so adblocker works on pages
 user_pref("identity.fxaccounts.enabled", false); // disable Firefox Sync
-user_pref("browser.tabs.firefox-view", false); // disable Firefox View
-user_pref("browser.tabs.firefox-view-next", false); // disable Firefox View [FF119+]
 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.ssl.require_safe_negotiation", true); // safe negotiation
 user_pref("security.cert_pinning.enforcement_level", 2); // strict public key pinning
-user_pref("browser.download.useDownloadDir", true); // one-click downloads

 /** PESKYFOX ***/
-user_pref("cookiebanners.service.mode", 2); // fall back to the accept button to remove banner
 user_pref("devtools.accessibility.enabled", false); // removes un-needed "Inspect Accessibility Properties" on right-click
 user_pref("browser.newtabpage.activity-stream.showSponsoredTopSites", false); // Settings>Home>Firefox Home Content>Recent Activity>Shortcuts>Sponsored shortcuts
 user_pref("browser.newtabpage.activity-stream.showSponsored", false); // Settings>Home>Firefox Home Content>Recent Activity>Recommended by Pocket>Sponsored Stories  
@@ -61,8 +63,8 @@ user_pref("browser.newtabpage.activity-stream.section.highlights.includeBookmark
 user_pref("browser.newtabpage.activity-stream.section.highlights.includeDownloads", false); // Settings>Home>Firefox Home Content>Recent Activity>Most Recent Download
 user_pref("browser.newtabpage.activity-stream.section.highlights.includeVisited", false); // Settings>Home>Firefox Home Content>Recent Activity>Visited Pages
 user_pref("browser.newtabpage.activity-stream.section.highlights.includePocket", false); // Settings>Home>Firefox Home Content>Recent Activity>Pages Saved to Pocket
-user_pref("browser.download.useDownloadDir", true); // use direct downloads
-user_pref("browser.download.folderList", 0); // 0=desktop, 1=downloads, 2=last used
+//user_pref("browser.download.useDownloadDir", true); // use direct downloads
+//user_pref("browser.download.folderList", 0); // 0=desktop, 1=downloads, 2=last used
 user_pref("browser.toolbars.bookmarks.visibility", "never"); // always hide bookmark bar
 user_pref("browser.startup.homepage_override.mstone", "ignore"); // What's New page after updates; master switch
 user_pref("browser.urlbar.suggest.history", false); // Browsing history; hide URL bar dropdown suggestions
@@ -70,52 +72,67 @@ user_pref("browser.urlbar.suggest.bookmark", false); // Bookmarks; hide URL bar
 user_pref("browser.urlbar.suggest.openpage", false); // Open tabs; hide URL bar dropdown suggestions
 user_pref("browser.urlbar.suggest.topsites", false); // Shortcuts; disable dropdown suggestions with empty query
 user_pref("browser.urlbar.suggest.engines", false); // Search engines; tab-to-search
-//user_pref("browser.urlbar.suggest.searches", false); // (needed?); hide URL bar dropdown suggestions
+user_pref("browser.urlbar.quicksuggest.enabled", false); // hide Firefox Suggest UI in the settings
 //user_pref("browser.urlbar.maxRichResults", 1); // minimum suggestion needed for URL bar autofill
 user_pref("browser.bookmarks.max_backups", 0); // minimize disk use; manually back-up
 user_pref("view_source.wrap_long_lines", true);  // wrap source lines
 user_pref("devtools.debugger.ui.editor-wrapping", true);  // wrap lines in devtools
 user_pref("browser.zoom.full", false); // text-only zoom, not all elements on page
-user_pref("pdfjs.sidebarViewOnLoad", 2); // force showing of Table of Contents in sidebar for PDFs (if available)
-//user_pref("layout.word_select.eat_space_to_next_word", false); // do not select the space next to a word when selecting a word
+//user_pref("pdfjs.sidebarViewOnLoad", 2); // force showing of Table of Contents in sidebar for PDFs (if available)
+user_pref("layout.word_select.eat_space_to_next_word", false); // do not select the space next to a word when selecting a word
 //user_pref("browser.tabs.loadInBackground", false); // CTRL+SHIFT+CLICK for background tabs; Settings>General>Tabs>When you open a link, image or media in a new tab, switch to it immediately
 user_pref("browser.tabs.loadBookmarksInTabs", true); // force bookmarks to open in a new tab, not the current tab
 user_pref("ui.key.menuAccessKey", 0); // remove underlined characters from various settings
 user_pref("general.autoScroll", false); // disable unintentional behavior for middle click
-user_pref("ui.SpellCheckerUnderlineStyle", 1); // dots for spell check errors
+user_pref("ui.SpellCheckerUnderlineStyle", 1); // [HIDDEN] dots for spell check errors
 user_pref("media.videocontrols.picture-in-picture.display-text-tracks.size", "small"); // PiP
 user_pref("media.videocontrols.picture-in-picture.urlbar-button.enabled", false); // PiP in address bar
 user_pref("reader.parse-on-load.enabled", false); // disable reader mode
 //user_pref("reader.color_scheme", "auto"); // match system theme for when reader is enabled
 //user_pref("browser.urlbar.openintab", true); // stay on current site and open new tab when typing in URL bar
-user_pref("browser.urlbar.trimHttps", true); // hide https in URL bar [FF119]

 /** DELETE IF NOT NIGHTLY ***/
 user_pref("privacy.userContext.enabled", false); // disable Containers functionality
 user_pref("browser.crashReports.unsubmittedCheck.enabled", false); // true by default on NIGHTLY
 //user_pref("xpinstall.signatures.required", false); // [ESR/DEV/NIGHTLY]
+//user_pref("browser.urlbar.suggest.trending", false); // FF119+ disable showing trending searches; unselect for clean UI
 //user_pref("browser.urlbar.suggest.quickactions", false); // Quick actions; hide URL bar dropdown suggestions
 //user_pref("browser.urlbar.suggest.clipboard", false); // Clipboard; hide URL bar dropdown suggestions

 /** DELETE IF NOT WINDOWS DESKTOP ***/
 user_pref("network.trr.mode", 3); // enable TRR (without System fallback)
-user_pref("gfx.canvas.accelerated", true); // DEFAULT NON-WINDOWS; enable if not using an integrated GPU
-user_pref("browser.startup.preXulSkeletonUI", false); // WINDOWS
+//user_pref("browser.startup.preXulSkeletonUI", false); // WINDOWS
 user_pref("default-browser-agent.enabled", false); // deny Mozilla monitoring default browser (breaks "Make Default" button)
 user_pref("geo.provider.ms-windows-location", false); // [WINDOWS]
 user_pref("pdfjs.defaultZoomValue", "125"); // alt=page-width; PDF zoom level
 user_pref("gfx.font_rendering.cleartype_params.rendering_mode", 5);
 user_pref("gfx.font_rendering.cleartype_params.cleartype_level", 100);
 user_pref("gfx.font_rendering.cleartype_params.force_gdi_classic_for_families", "");
-user_pref("gfx.font_rendering.cleartype_params.force_gdi_classic_max_size", 6);
 user_pref("gfx.font_rendering.directwrite.use_gdi_table_loading", false);
-//user_pref("gfx.font_rendering.cleartype_params.gamma", 898); // 1000-2200; https://www.reddit.com/r/firefox/comments/10ed7o2/comment/j4qar9y/
+//user_pref("gfx.font_rendering.cleartype_params.enhanced_contrast", 100);
 //user_pref("font.name.serif.x-western", "Roboto Slab"); // serif font
 //user_pref("font.name.sans-serif.x-western", "Roboto"); // sans-serif font
 //user_pref("font.name.monospace.x-western", "Fira Code"); // monospace font
-user_pref("browser.cache.disk.enable", false); // disable disk cache
-user_pref("browser.cache.memory.capacity", 65536); // default= -1 (32768)
-user_pref("media.memory_cache_max_size", 131072); // AF=65536
+
+/** DELETE IF NOT ENTERPRISE WINDOWS LAPTOP ***/
+user_pref("urlclassifier.trackingSkipURLs", ""); // do not allow embedded tweets, Instagram, Reddit, and Tiktok posts
+user_pref("urlclassifier.features.socialtracking.skipURLs", ""); // do not allow embedded tweets, Instagram, Reddit, and Tiktok posts
+user_pref("browser.search.suggest.enabled", true); // search suggestions
+user_pref("browser.urlbar.showSearchSuggestionsFirst", true); // Show search suggestions ahead of browsing history in address bar results
+//user_pref("network.connectivity-service.enabled", true); // public wifi
+//user_pref("network.trr.confirmationNS", "example.com"); // TRR confirmation request
+//user_pref("network.trr.mode", 2); // enable TRR (without System fallback)
+//user_pref("browser.startup.preXulSkeletonUI", false); // WINDOWS
+user_pref("gfx.font_rendering.cleartype_params.rendering_mode", 5);
+user_pref("gfx.font_rendering.cleartype_params.cleartype_level", 100);
+user_pref("gfx.font_rendering.cleartype_params.force_gdi_classic_for_families", "");
+user_pref("gfx.font_rendering.directwrite.use_gdi_table_loading", false);
+user_pref("gfx.font_rendering.cleartype_params.enhanced_contrast", 100);
+user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", false); // no need for userChrome
+//user_pref("browser.urlbar.suggest.history", true); // Browsing history
+//user_pref("browser.urlbar.suggest.bookmark", true); // Bookmarks
+//user_pref("browser.urlbar.suggest.openpage", true); // Open tabs
+//user_pref("browser.urlbar.suggest.topsites", true); // Shortcuts

 /** DELETE IF NOT macOS LAPTOP ***/
 user_pref("network.trr.mode", 2); // enable TRR (with System fallback)
@@ -124,3 +141,9 @@ user_pref("geo.provider.use_corelocation", false); // geolocation [MAC]
 user_pref("pdfjs.defaultZoomValue", "page-width"); // PDF zoom level
 user_pref("app.update.auto", false); // disable auto-installing Firefox updates [NON-WINDOWS]
 //user_pref("font.name.monospace.x-western", "SF Mono"); // monospace font
+
+/** DELETE IF NOT LINUX LAPTOP ***/
+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
@@ -10,7 +10,7 @@
 /****************************************************************************
 * Betterfox                                                                *
 * "Ad meliora"                                                             *
- * version: 126                                                             *
+ * version: 138                                                             *
 * url: https://github.com/yokoffing/Betterfox                              *
 ****************************************************************************/

@@ -21,12 +21,14 @@
 user_pref("content.notify.interval", 100000);

 /** GFX ***/
-user_pref("gfx.canvas.accelerated.cache-items", 4096);
 user_pref("gfx.canvas.accelerated.cache-size", 512);
 user_pref("gfx.content.skia-font-cache-size", 20);

 /** DISK CACHE ***/
-user_pref("browser.cache.jsbc_compression_level", 3);
+user_pref("browser.cache.disk.enable", false);
+
+/** MEMORY CACHE ***/
+user_pref("browser.sessionhistory.max_total_viewers", 4);

 /** MEDIA CACHE ***/
 user_pref("media.memory_cache_max_size", 65536);
@@ -45,25 +47,23 @@ 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);
-user_pref("dom.enable_web_task_scheduling", true);
-user_pref("dom.security.sanitizer.enabled", true);

 /****************************************************************************
 * SECTION: SECUREFOX                                                       *
 ****************************************************************************/
 /** TRACKING PROTECTION ***/
 user_pref("browser.contentblocking.category", "strict");
-user_pref("urlclassifier.trackingSkipURLs", "*.reddit.com, *.twitter.com, *.twimg.com, *.tiktok.com");
-user_pref("urlclassifier.features.socialtracking.skipURLs", "*.instagram.com, *.twitter.com, *.twimg.com");
-user_pref("network.cookie.sameSite.noneRequiresSecure", true);
 user_pref("browser.download.start_downloads_in_tmp_dir", true);
 user_pref("browser.helperApps.deleteTempFileOnExit", true);
 user_pref("browser.uitour.enabled", false);
@@ -71,7 +71,6 @@ user_pref("privacy.globalprivacycontrol.enabled", true);

 /** OCSP & CERTS / HPKP ***/
 user_pref("security.OCSP.enabled", 0);
-user_pref("security.remote_settings.crlite_filters.enabled", true);
 user_pref("security.pki.crlite_mode", 2);

 /** SSL / TLS ***/
@@ -84,23 +83,20 @@ 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);

 /** 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.suggest.quicksuggest.sponsored", false);
-user_pref("browser.urlbar.suggest.quicksuggest.nonsponsored", false);
+user_pref("browser.urlbar.quicksuggest.enabled", false);
+user_pref("browser.urlbar.groupLabels.enabled", false);
 user_pref("browser.formfill.enable", false);
-user_pref("security.insecure_connection_text.enabled", true);
-user_pref("security.insecure_connection_text.pbmode.enabled", true);
 user_pref("network.IDN_show_punycode", true);

-/** HTTPS-FIRST POLICY ***/
-user_pref("dom.security.https_first", true);
-user_pref("dom.security.https_first_schemeless", true);
-
 /** PASSWORDS ***/
 user_pref("signon.formlessCapture.enabled", false);
 user_pref("signon.privateBrowsingCapture.enabled", false);
@@ -109,10 +105,10 @@ user_pref("editor.truncate_user_pastes", false);

 /** MIXED CONTENT + CROSS-SITE ***/
 user_pref("security.mixed_content.block_display_content", true);
-user_pref("security.mixed_content.upgrade_display_content", true);
-user_pref("security.mixed_content.upgrade_display_content.image", true);
 user_pref("pdfjs.enableScripting", false);
-user_pref("extensions.postDownloadThirdPartyPrompt", false);
+
+/** EXTENSIONS ***/
+user_pref("extensions.enabledScopes", 5);

 /** HEADERS / REFERERS ***/
 user_pref("network.http.referer.XOriginTrimmingPolicy", 2);
@@ -120,19 +116,16 @@ user_pref("network.http.referer.XOriginTrimmingPolicy", 2);
 /** CONTAINERS ***/
 user_pref("privacy.userContext.ui.enabled", true);

-/** WEBRTC ***/
-user_pref("media.peerconnection.ice.proxy_only_if_behind_proxy", true);
-user_pref("media.peerconnection.ice.default_address_only", true);
-
 /** SAFE BROWSING ***/
 user_pref("browser.safebrowsing.downloads.remote.enabled", false);

 /** MOZILLA ***/
 user_pref("permissions.default.desktop-notification", 2);
 user_pref("permissions.default.geo", 2);
-user_pref("geo.provider.network.url", "https://location.services.mozilla.com/v1/geolocate?key=%MOZILLA_API_KEY%");
+user_pref("geo.provider.network.url", "https://beacondb.net/v1/geolocate");
+user_pref("browser.search.update", false);
 user_pref("permissions.manager.defaultsUrl", "");
-user_pref("webchannel.allowObject.urlWhitelist", "");
+user_pref("extensions.getAddons.cache.enabled", false);

 /** TELEMETRY ***/
 user_pref("datareporting.policy.dataSubmissionEnabled", false);
@@ -151,6 +144,7 @@ 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);
@@ -160,12 +154,6 @@ user_pref("app.normandy.api_url", "");
 /** CRASH REPORTS ***/
 user_pref("breakpad.reportURL", "");
 user_pref("browser.tabs.crashReporting.sendReport", false);
-user_pref("browser.crashReports.unsubmittedCheck.autoSubmit2", false);
-
-/** DETECTION ***/
-user_pref("captivedetect.canonicalURL", "");
-user_pref("network.captive-portal-service.enabled", false);
-user_pref("network.connectivity-service.enabled", false);

 /****************************************************************************
 * SECTION: PESKYFOX                                                        *
@@ -179,43 +167,35 @@ user_pref("browser.shell.checkDefaultBrowser", false);
 user_pref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.addons", false);
 user_pref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.features", false);
 user_pref("browser.preferences.moreFromMozilla", false);
-user_pref("browser.tabs.tabmanager.enabled", false);
 user_pref("browser.aboutConfig.showWarning", false);
 user_pref("browser.aboutwelcome.enabled", false);
+user_pref("browser.profiles.enabled", true);

 /** THEME ADJUSTMENTS ***/
 user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true);
 user_pref("browser.compactmode.show", true);
-user_pref("browser.display.focus_ring_on_anything", true);
-user_pref("browser.display.focus_ring_style", 0);
-user_pref("browser.display.focus_ring_width", 0);
-user_pref("layout.css.prefers-color-scheme.content-override", 2);
 user_pref("browser.privateWindowSeparation.enabled", false); // WINDOWS

-/** COOKIE BANNER HANDLING ***/
-user_pref("cookiebanners.service.mode", 1);
-user_pref("cookiebanners.service.mode.privateBrowsing", 1);
-
 /** 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.delay", -1);
 user_pref("full-screen-api.warning.timeout", 0);

 /** URL BAR ***/
-user_pref("browser.urlbar.suggest.calculator", true);
 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.feeds.topsites", false);
+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);

 /** POCKET ***/
 user_pref("extensions.pocket.enabled", false);

 /** DOWNLOADS ***/
-user_pref("browser.download.always_ask_before_handling_new_types", true);
 user_pref("browser.download.manager.addToRecentDocs", false);

 /** PDF ***/
@@ -234,12 +214,16 @@ user_pref("layout.word_select.eat_space_to_next_word", false);
 // visit https://github.com/yokoffing/Betterfox/wiki/Optional-Hardening
 // Enter your personal overrides below this line:

+
+
 /****************************************************************************
 * SECTION: SMOOTHFOX                                                       *
 ****************************************************************************/
 // visit https://github.com/yokoffing/Betterfox/blob/main/Smoothfox.js
 // Enter your scrolling overrides below this line:

+
+
 /****************************************************************************
 * END: BETTERFOX                                                           *
 ****************************************************************************/
@@ -0,0 +1,131 @@
+//
+/* You may copy+paste this file and use it as it is.
+ *
+ * If you make changes to your about:config while the program is running, the
+ * changes will be overwritten by the user.js when the application restarts.
+ *
+ * To make lasting changes to preferences, you will have to edit the user.js.
+ */
+
+/****************************************************************************
+ * BetterZen                                                                *
+ * "Ex nihilo nihil fit"                                                    *
+ * version: 138                                                             *
+ * url: https://github.com/yokoffing/Betterfox                              *
+****************************************************************************/
+
+/****************************************************************************
+ * SECTION: FASTFOX                                                         *
+****************************************************************************/
+/** GFX ***/
+user_pref("gfx.canvas.accelerated.cache-size", 512);
+
+/** DISK CACHE ***/
+user_pref("browser.cache.disk.enable", false);
+
+/** NETWORK ***/
+user_pref("network.http.pacing.requests.enabled", false);
+
+/** SPECULATIVE LOADING ***/
+user_pref("network.dns.disablePrefetch", true);
+user_pref("network.dns.disablePrefetchFromHTTPS", true);
+user_pref("network.prefetch-next", false);
+user_pref("network.predictor.enabled", false);
+user_pref("network.predictor.enable-prefetch", false);
+
+/****************************************************************************
+ * SECTION: SECUREFOX                                                       *
+****************************************************************************/
+/** TRACKING PROTECTION ***/
+user_pref("browser.contentblocking.category", "strict");
+user_pref("browser.download.start_downloads_in_tmp_dir", true);
+
+/** OCSP & CERTS / HPKP ***/
+user_pref("security.OCSP.enabled", 0);
+user_pref("security.pki.crlite_mode", 2);
+
+/** DISK AVOIDANCE ***/
+user_pref("browser.sessionstore.interval", 60000);
+
+/** SHUTDOWN & SANITIZING ***/
+user_pref("browser.privatebrowsing.resetPBM.enabled", true);
+user_pref("privacy.history.custom", true);
+
+/** SEARCH / URL BAR ***/
+user_pref("browser.urlbar.quicksuggest.enabled", false);
+
+/** PASSWORDS ***/
+user_pref("signon.formlessCapture.enabled", false);
+user_pref("signon.privateBrowsingCapture.enabled", false);
+user_pref("network.auth.subresource-http-auth-allow", 1);
+user_pref("editor.truncate_user_pastes", false);
+
+/** HEADERS / REFERERS ***/
+user_pref("network.http.referer.XOriginTrimmingPolicy", 2);
+
+/** SAFE BROWSING ***/
+user_pref("browser.safebrowsing.downloads.remote.enabled", false);
+
+/** MOZILLA ***/
+user_pref("permissions.default.desktop-notification", 2);
+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", "");
+
+/****************************************************************************
+ * SECTION: PESKYFOX                                                        *
+****************************************************************************/
+/** MOZILLA UI ***/
+user_pref("browser.shell.checkDefaultBrowser", false);
+
+/** NEW TAB PAGE ***/
+user_pref("browser.newtabpage.activity-stream.default.sites", "");
+
+/** URL BAR ***/
+user_pref("dom.text_fragments.create_text_fragment.enabled", true);
+
+/****************************************************************************
+ * START: ZEN-SPECIFIC OVERRIDES                                            *
+****************************************************************************/
+// 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);
+
+// PREF: disable new tab preload since they are off by default
+//user_pref("browser.newtab.preload", false);
+
+// PREF: show Enhance Tracking Protection shield in URL bar
+// 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                                                      *
+****************************************************************************/
+// visit https://github.com/yokoffing/Betterfox/wiki/Common-Overrides
+// visit https://github.com/yokoffing/Betterfox/wiki/Optional-Hardening
+// Enter your personal overrides below this line:
+
+
+/****************************************************************************
+ * SECTION: SMOOTHFOX                                                       *
+****************************************************************************/
+// Reset Zen's custom scrolling prefs to their Firefox defaults before making changes!
+// [1] Zen changes: https://github.com/zen-browser/desktop/blob/3932ec21f5661440c4b20796f90341a6ac725818/src/browser/app/profile/zen-browser.js#L297-L312
+// [2] Firefox defaults: https://searchfox.org/mozilla-release/source/modules/libpref/init/StaticPrefList.yaml
+// Then apply an example from Smoothfox
+// [3] https://github.com/yokoffing/Betterfox/blob/main/Smoothfox.js
+// Enter your scrolling overrides below this line:
+
+
+/****************************************************************************
+ * END: BETTERFOX                                                           *
+****************************************************************************/
Author	SHA1	Message	Date
yokoffing	9052068d89	138.0 (#392 )	2025-06-02 00:45:46 -04:00
NewKidOnTheBlock	8c39175a02	SoGo calendar integration issues	2025-05-14 21:15:43 -04:00
sykoram	1a6be093dc	Improve install.py (#373 ) * 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	2025-04-28 10:06:35 -04:00
yokoffing	efee151779	Delete .github/ISSUE_TEMPLATE/bug_report.md	2025-04-16 12:21:48 -04:00
Danila Kononov	77983c7431	Create YML version of bug report form (#376 )	2025-04-16 12:08:16 -04:00
yokoffing	d3c53532eb	v137.0 (#379 )	2025-04-16 10:10:06 -04:00
yokoffing	6ef4cdbbe7	135.0 (#361 )	2025-02-25 17:43:16 -05:00
Michael Weems	9c1d652299	Update install.py (#369 ) Updating to Check Location of Firefox Install	2025-02-25 17:30:05 -05:00
yokoffing	09dd87a3ab	v132-133 (#350 )	2024-12-09 14:25:38 -05:00
Cat	d70e3cdebe	Updated install.py _get_default_profile_folder (#346 )	2024-12-09 14:21:25 -05:00
Cat	429abb61f5	Added installer.py (#318 )	2024-11-08 15:40:11 -05:00
yokoffing	80261756ca	v131 (#328 )	2024-11-01 18:02:48 -04:00
yokoffing	ab5ede0fef	v130 (#321 )	2024-09-26 14:43:48 -04:00
yokoffing	d07af83ee0	Sanitizer	2024-09-24 15:21:09 -04:00
yokoffing	e026ed7d3a	v.129 (#315 )	2024-08-20 22:08:38 -04:00
yokoffing	29f0816962	tab preview pref changes https://github.com/yokoffing/Betterfox/issues/309	2024-07-22 10:19:34 -04:00
yokoffing	c0d65d409d	fix dashes	2024-07-16 13:45:46 -04:00
yokoffing	c5fca2dbf7	v127-128 (#301 )	2024-07-16 10:30:49 -04:00
Hal	9756922ee9	update NTP setting text	2024-05-24 14:23:00 -04:00
Hal	dfb297bbfb	some values need quotation marks https://github.com/yokoffing/Betterfox/issues/294	2024-05-21 09:59:03 -04:00
Hal	cf2c13a45f	v123-126 (#276 )	2024-05-20 14:37:07 -04:00