diff --git a/userChrome.css b/userChrome.css
index e18874c..bc1093d 100644
--- a/userChrome.css
+++ b/userChrome.css
@@ -197,7 +197,10 @@
   .titlebar-button:-moz-lwtheme {
     appearance: auto !important;
   }
-  .titlebar-min:-moz-lwtheme, .titlebar-max:-moz-lwtheme, .titlebar-restore:-moz-lwtheme, .titlebar-close:-moz-lwtheme {
+  .titlebar-min:-moz-lwtheme,
+  .titlebar-max:-moz-lwtheme,
+  .titlebar-restore:-moz-lwtheme,
+  .titlebar-close:-moz-lwtheme {
     list-style-image: none !important;
   }
   .titlebar-button:-moz-lwtheme:hover,