diff --git a/chrome/tabs_on_bottom.css b/chrome/tabs_on_bottom.css
index 6601c6b..0265eea 100644
--- a/chrome/tabs_on_bottom.css
+++ b/chrome/tabs_on_bottom.css
@@ -58,3 +58,4 @@ linux_gtk_window_control_patch.css
 toolbox#navigator-toolbox > toolbar#nav-bar.browser-toolbar{ animation: none; }
 #navigator-toolbox:hover #TabsToolbar{ animation: slidein ease-out 48ms 1 }
 #TabsToolbar > .titlebar-buttonbox-container{ visibility: visible }
+#navigator-toolbox:not(:-moz-lwtheme){ background-color: -moz-dialog }