perf: Only show gradient blend mode if used and removed unused perf configs, b=no-bug, c=common, compact-mode, workspaces

src/browser/app/profile/performance.inc

@@ -2,19 +2,6 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-// ---- Experimental settings to try make zen faster
-pref("media.memory_cache_max_size", 1048576);
-pref("media.cache_readahead_limit", 9000);
-pref("media.cache_resume_threshold", 3600);
-pref("media.memory_caches_combined_limit_kb", 2560000);
-
-pref("image.mem.decode_bytes_at_a_time", 32768);
-
-// Enable GPU by default
-pref("gfx.canvas.accelerated", true);
-pref("media.hardware-video-decoding.enabled", true);
-pref("layers.gpu-process.enabled", true);
-
 #ifdef XP_MACOSX
 // Pref to control the reponse taken on macOS when the OS is under memory
 // pressure. Changes to the pref take effect immediately. Browser restart not
@@ -28,14 +15,8 @@ pref("layers.gpu-process.enabled", true);
 pref("browser.lowMemoryResponseMask", 3);
 #endif
 
-// Prefetching:
-pref("network.dns.disablePrefetch", false);
-pref("network.prefetch-next", true);
-pref("network.dns.disablePrefetchFromHTTPS", false);
 pref("network.predictor.enable-hover-on-ssl", true);
-pref("network.http.rcwn.enabled", false);
 
 // Experimental Zen Features
 // Strategy to use for bytecode cache (Thanks https://github.com/gunir)
 pref('dom.script_loader.bytecode_cache.strategy', 2);
-pref("layout.css.grid-template-masonry-value.enabled", true);

src/browser/app/profile/windows.inc

@@ -6,5 +6,3 @@
 pref("widget.windows.mica", true);
 pref("widget.windows.mica.popups", true);
 pref("widget.windows.mica.toplevel-backdrop", 2);
-
-pref("dom.ipc.processPriorityManager.backgroundUsesEcoQoS", false);

src/zen/common/styles/zen-browser-ui.css

@@ -78,13 +78,17 @@
     transition: background-color var(--inactive-window-transition);
   }
 
-  #zen-browser-grain {
-    content: '';
+  & #zen-browser-grain {
+    display: none;
+  }
+
+  :root[zen-show-grainy-background='true'] & #zen-browser-grain {
+    display: flex;
     width: 100%;
     height: 100%;
     background-image: url(chrome://browser/content/zen-images/grain-bg.png);
     pointer-events: none;
-    z-index: 0;
+    z-index: 1;
     opacity: var(--zen-grainy-background-opacity, 0);
     mix-blend-mode: overlay;
     transition: opacity 0.3s ease-in-out;

src/zen/compact-mode/zen-compact-mode.css

@@ -391,7 +391,7 @@
         ) {
         & #zen-appcontent-navbar-container {
           visibility: visible !important;
-          &::before {
+          :root[zen-show-grainy-background='true'] &::before {
             content: '';
             position: absolute;
             top: 0;

src/zen/workspaces/ZenGradientGenerator.mjs

@@ -969,9 +969,14 @@
         texture,
       };
     }
+
     //TODO: add a better noise system that adds noise not just changes transparency
     updateNoise(texture) {
       document.documentElement.style.setProperty('--zen-grainy-background-opacity', texture);
+      document.documentElement.setAttribute(
+        'zen-show-grainy-background',
+        texture > 0 ? 'true' : 'false'
+      );
     }
 
     hexToRgb(hex) {