@-moz-document domain(facebook.com) {
 .fb95_preview_bar, .welcome_banner {
   display: none !important;
   visibility: hidden !important;
 }
 /* Failed attempt to get the 'back to the old facebook' to show up */
 .fb95_preview_bar_ritem, .fb95_preview_bar_ritem {
   position: fixed !important;
   float: none !important;
   top: 0 !important;
   right: 0 !important;
   display: block !important;
   visibility: visible !important;
 }
}