/* Pop-up Menu - glossy background */
@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);

popup:not(#autoscroller), menupopup, #contentAreaContextMenu {
  background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABoAAAABCAYAAADAW76WAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAEtJREFUeNp0i7sNgDAQQ81CrMcqpGa660lk30dKoKDDkuVXPG8kr3a2Az+JDPR7wF2QVt0hEhTXCmb2seSv87ge6zc6MhJVtU8BBgDaRDparY4oywAAAABJRU5ErkJggg==") !important;
/*background-color: rgba(rr,gg,bb,0.9) !important; *optional*/
  background-position: right center !important;
  background-repeat: repeat-y !important;
  background-attachment: scroll !important;
  -moz-border-radius: 4px !important;
}