Fix: Tabbar - No show at windows #368

css/leptonChrome.css

@@ -3656,6 +3656,11 @@
   #tab-notification-deck-template {
     flex-basis: 100%;
   }
+
+  /* -moz-default-appearance: -moz-window-titlebar */
+  #titlebar {
+    -moz-appearance: none !important;
+  }
 }
 @supports -moz-bool-pref("userChrome.tab.on_bottom") {
   /* Source file https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/tabs_on_bottom.css made available under Mozilla Public License v. 2.0
@@ -3663,7 +3668,6 @@
   /*= Tabbar - Move to bottom ==================================================*/
   #titlebar {
     order: 2;
-    -moz-appearance: none !important;
     --tabs-navbar-shadow-size: 0px;
   }
 

src/tabbar/_index.scss

@@ -11,6 +11,11 @@
   #tab-notification-deck-template {
     flex-basis: 100%;
   }
+
+  /* -moz-default-appearance: -moz-window-titlebar */
+  #titlebar {
+    -moz-appearance: none !important;
+  }
 }
 
 @include Option("userChrome.tab.on_bottom") {

src/tabbar/_tabs_on_bottom.scss

@@ -4,7 +4,6 @@ See the above repository for updates as well as full license text. */
 /*= Tabbar - Move to bottom ==================================================*/
 #titlebar{
   order: 2;
-  -moz-appearance: none !important;
   --tabs-navbar-shadow-size: 0px;
 }
 #tab-notification-deck {