menupopup > menu,
popup > menu,
menupopup > menuitem,
popup > menuitem {
max-width: 42em;
background: none !important;
}
menupopup > menu[_moz-menuactive="true"],
menupopup > menuitem[_moz-menuactive="true"],
popup > menu[_moz-menuactive="true"],
popup > menuitem[_moz-menuactive="true"] {
background: url("chrome://global/skin/menu/menu-hover2.png") repeat left center !important;
color: #fff !important;
}