Update user-overrides.js

Fastfox.js

@@ -130,6 +130,38 @@ user_pref("content.notify.interval", 100000); // (.10s); default=120000 (.12s)
     user_pref("gfx.canvas.accelerated.cache-size", 512); // default=256; Chrome=512; max=2048
     //user_pref("gfx.canvas.max-size", 32767); // [DEFAULT]
 
+/****************************************************************************
+ * SECTION: JAVASCRIPT OPTIONS                                              *
+****************************************************************************/
+// PREF: lower the Baseline JIT compilation threshold
+// Controls how many times a function runs before Firefox promotes it from the
+// C++ interpreter to the Baseline JIT compiler. The Baseline JIT compiles each
+// bytecode instruction into a small piece of machine code and uses Inline Caches
+// (ICs) to both speed up execution and collect type info for the Ion optimizing JIT.
+// Lowering this from 100 to 50 promotes "warm" functions to compiled machine code
+// sooner, which reduces dropped frames while browsing.
+// [1] https://ra1ahq.blog/en/optimizaciya-proizvoditelnosti-mozilla-firefox-chast-1
+user_pref("javascript.options.baselinejit.threshold", 50); // default=100
+
+// PREF: raise the IonMonkey (Ion) optimizing-JIT compilation threshold
+// Controls how many times a function runs before Firefox promotes it from the
+// Baseline JIT to IonMonkey, the optimizing JIT. Ion applies advanced compiler
+// optimizations to produce fast code for "hot" functions, at the cost of slower
+// compilation. The Baseline JIT is quicker to produce but can't cope with the large
+// amounts of code on heavy websites.
+// Raising this threshold keeps more code on the faster-to-compile Baseline JIT,
+// reserving the expensive Ion compilation for only the hottest functions.
+// [1] https://ra1ahq.blog/en/optimizaciya-proizvoditelnosti-mozilla-firefox-chast-1
+//user_pref("javascript.options.ion.threshold", 1500); // DEFAULT
+
+// PREF: decrease concurrent JavaScript garbage collection (GC) threads
+// Sets the divisor in the formula: GC threads = CPU threads ÷ divisor (min 1).
+// A LOWER value = MORE parallel GC threads. A HIGHER value = FEWER threads.
+// Example (24-thread CPU):  divisor 1 → 24 threads | 2 → 12 | 4 (default) → 6 | 12 → 2
+// Power users with many cores should LOWER this value, not raise it.
+// [NOTE] Mozilla's default of 4 is conservative to avoid thread contention on weak hardware.
+//user_pref("javascript.options.concurrent_multiprocess_gcs.cpu_divisor", 4); // DEFAULT
+
 /****************************************************************************
  * SECTION: DISK CACHE                                                     *
 ****************************************************************************/
@@ -306,8 +338,8 @@ user_pref("image.mem.decode_bytes_at_a_time", 32768); // default=16384; chunk si
 // [1] https://www.mail-archive.com/support-seamonkey@lists.mozilla.org/msg74561.html
 // [2] https://github.com/yokoffing/Betterfox/issues/279
 // [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
+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

README.md

@@ -1,6 +1,6 @@
 ![Badge](https://hitscounter.dev/api/hit?url=https%3A%2F%2Fgithub.com%2Fyokoffing%2FBetterfox&label=&icon=github&color=%23198754&message=&style=flat&tz=US%2FEastern)![GitHub Maintained](https://img.shields.io/badge/maintained-yes-green)![GitHub last commit](https://img.shields.io/github/last-commit/yokoffing/betterfox)![GitHub issues](https://img.shields.io/github/issues/yokoffing/betterfox)![GitHub closed issues](https://img.shields.io/github/issues-closed/yokoffing/betterfox)[![shields.io Stars](https://img.shields.io/github/stars/yokoffing/betterfox)](https://github.com/yokoffing/betterfox/stargazers)
 
-Do not trust sites that claim to be Betterfox. This page is the only official source.
+:warning: Do not trust sites that claim to be Betterfox. This page is the only official source.
 
 # Betterfox
 [about:config](https://support.mozilla.org/en-US/kb/about-config-editor-firefox) tweaks to enhance [Mozilla Firefox](https://www.mozilla.org/en-US/firefox/new/).

personal/user-overrides.js

@@ -20,6 +20,13 @@
 /** FASTFOX ***/
 user_pref("browser.sessionstore.restore_pinned_tabs_on_demand", true);
 user_pref("browser.sessionstore.interval", 900000); // save session every 15 minutes
+user_pref("browser.newtab.preload", false); // disable new tab if not using
+user_pref("nglayout.initialpaint.delay", 50); // delay painting new tabs
+user_pref("javascript.options.baselinejit.threshold", 50); // default=100
+//user_pref("javascript.options.ion.threshold", 5000);
+user_pref("network.buffer.cache.size", 65535);
+user_pref("network.buffer.cache.count", 48);
+user_pref("javascript.options.concurrent_multiprocess_gcs.cpu_divisor", 2); // default=4
 
 /** SECUREFOX ***/
 user_pref("privacy.trackingprotection.allow_list.convenience.enabled", false); // disable Strict allowlist of convenience features
@@ -55,6 +62,8 @@ user_pref("dom.serviceWorkers.privateBrowsing.enabled", false); // disable servi
 user_pref("privacy.restrict3rdpartystorage.heuristic.navigation", false); // restrict dynamic storage access
 user_pref("privacy.restrict3rdpartystorage.heuristic.opened_window_after_interaction", false); // restrict dynamic storage access
 user_pref("security.cert_pinning.enforcement_level", 2); // strict public key pinning
+user_pref("dom.fs.enabled", false); // FROST
+user_pref("dom.fs.writable_file_stream.enabled", false); // FROST
 
 /** PESKYFOX ***/
 user_pref("devtools.accessibility.enabled", false); // removes un-needed "Inspect Accessibility Properties" on right-click
@@ -105,6 +114,7 @@ user_pref("geo.provider.ms-windows-location", 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.enhanced_contrast", 100);
+//user_pref("browser.display.auto_quality_min_font_size", 0);
 //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
@@ -121,6 +131,7 @@ user_pref("network.dnsCacheExpiration", 3600); // keep entries for 1 hour; defau
 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.enhanced_contrast", 100);
+//user_pref("browser.display.auto_quality_min_font_size", 0);
 user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", false); // no need for userChrome
 
 /** DELETE IF NOT macOS ***/
@@ -147,5 +158,6 @@ user_pref("app.update.auto", false); // disable auto-installing Firefox updates
 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.enhanced_contrast", 100);
+//user_pref("browser.display.auto_quality_min_font_size", 0);
 user_pref("gfx.font_rendering.directwrite.use_gdi_table_loading", false);
 user_pref("privacy.userContext.enabled", false); // disable Container Tabs