Bug 635458 - Tab look regressed after 580970 with some GTK themes. r=mventnor

browser/themes/gnomestripe/browser/browser.css

@@ -1389,6 +1389,7 @@ richlistitem[type~="action"][actiontype="switchtab"] > .ac-url-box > .ac-action-
 #TabsToolbar[tabsontop=true]:not(:-moz-lwtheme) {
   -moz-appearance: menubar;
   color: -moz-menubartext;
+  box-shadow: 0 -1px 0 rgba(0,0,0,.1) inset;
 }
 
 #TabsToolbar[tabsontop=true]:not(:-moz-lwtheme):-moz-system-metric(menubar-drag) {