urlbar_popup_full_width: add workaround for Fx 119 light-dark() problem

Author: MrOtherGuy

chrome/urlbar_popup_full_width.css

@@ -50,4 +50,19 @@ See the above repository for updates as well as full license text. */
 
 /* This may seem pretty weird, but it gets around an issue where the height of urlbar may suddenly change when one starts typing into it */
 /* If you are otherwise modifying the urlbar height then you might need to modify the height of this too */
-#urlbar > #urlbar-input-container::before{ content: ""; display: flex; height: 24px; }
+#urlbar > #urlbar-input-container::before{ content: ""; display: flex; height: 24px; }
+
+/* This is a workaround for fx 119 specifically for users that use default theme, should remove when 120 is released. See bug 1853524 */
+#urlbar:not(:-moz-lwtheme){
+  --toolbar-bgcolor: #f9f9fb;
+  --toolbar-field-background-color: rgb(240, 240, 244);
+  --toolbar-field-focus-background-color: white;
+}
+/* ...and for dark variant */
+@media (prefers-color-scheme: dark){
+  #urlbar:not(:-moz-lwtheme){
+    --toolbar-bgcolor: rgb(43, 42, 51);
+    --toolbar-field-background-color: rgb(28, 27, 34);
+    --toolbar-field-focus-background-color: rgb(66, 65, 77)
+  }
+}