Bug 543306 - tabpanels background briefly visible when opening a new tab. r=gavin

browser/base/content/tabbrowser.css

@@ -40,6 +40,10 @@
   display: none;
 }
 
+tabpanels {
+  background-color: white;
+}
+
 %ifdef MOZ_WIDGET_GTK2
 /* Favicons override the "images-in-menus" metric in xul.css */
 .alltabs-item > .menu-iconic-left {

browser/themes/gnomestripe/browser/browser.css

@@ -1111,11 +1111,6 @@ statusbarpanel#statusbar-display {
   list-style-image: url("chrome://global/skin/icons/notloading_16.png");
 }
 
-
-tabpanels {
-  -moz-appearance: none;
-}
-
 /* Tabs */
 .tabbrowser-tab {
   border: none !important;

browser/themes/pinstripe/browser/browser.css

@@ -1591,10 +1591,6 @@ tabbrowser > tabbox {
   display: none;
 }
 
-tabbrowser > tabbox > tabpanels {
-  -moz-appearance: none !important;
-}
-
 /**
  * Tab Drag and Drop
  */
@@ -1782,10 +1778,6 @@ tabbrowser > tabbox > tabpanels {
   list-style-image: url("chrome://global/skin/icons/closetab-active.png");
 }
 
-tabpanels.plain {
-	background-color: #fff !important;
-}
-
 /* Bookmarks toolbar */
 .toolbar-drop-indicator {
   list-style-image: url(chrome://browser/skin/places/toolbarDropMarker.png);

browser/themes/winstripe/browser/browser.css

@@ -1177,10 +1177,6 @@ statusbarpanel#statusbar-display {
   border-bottom: 1px solid threedshadow;
 }
 
-tabpanels {
-  -moz-appearance: none;
-}
-
 /* tabbrowser-tab focus ring */
 .tabbrowser-tab > .tab-text {
   border: 1px dotted transparent;