chore: Updated to Firefox 141.0, b=no-bug, c=common, media

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

@@ -25,6 +25,14 @@
           color-scheme: env(-moz-content-preferred-color-scheme);
         }
       }
+
+      @media -moz-pref('zen.theme.acrylic-elements') {
+        & browser[type='content'] {
+          /* For the rendering engine to apply layering optimizations. This
+           * is a hacky solution, but it works for now. */
+          will-change: transform;
+        }
+      }
     }
   }
 }

src/zen/common/styles/zen-theme.css

@@ -169,7 +169,6 @@
   --tab-icon-overlay-stroke: light-dark(white, black) !important;
   --tab-close-button-padding: 5px !important;
 
-  --input-bgcolor: var(--zen-colors-tertiary) !important;
   --input-border-color: var(--zen-input-border-color) !important;
   --zen-themed-toolbar-bg-transparent: light-dark(var(--zen-branding-bg), #171717);
 

src/zen/media/zen-media-controls.css

@@ -147,7 +147,11 @@
   }
 
   & > toolbaritem {
-    --zen-media-control-bg: light-dark(rgba(255, 255, 255, 0.87), rgba(0, 0, 0, 0.87));
+    --zen-media-control-bg: color-mix(
+      in srgb,
+      var(--zen-primary-color) 15%,
+      light-dark(white, black)
+    );
     flex-grow: 1;
     padding: 0;
     transition: padding 0.3s ease-out;
@@ -158,7 +162,6 @@
     border-radius: var(--border-radius-medium);
     box-shadow: 0 0 6px rgba(0, 0, 0, 0.3);
     background-color: var(--zen-media-control-bg);
-    backdrop-filter: saturate(3) contrast(2) blur(10px);
     width: 100%;
   }