如果系统是 Windows XP,并且想用默认的菜单类型，那么在配置文件夹的 CHROME 目录下建一个名为 userChrome.css 的文本文件，把下面的代码加到这个文件中:

menupopup, popup {
 border: 1px solid ThreeDShadow !important;
 -moz-border-left-colors: ThreeDShadow !important;
 -moz-border-top-colors: ThreeDShadow !important;
 -moz-border-right-colors: ThreeDShadow !important;
 -moz-border-bottom-colors: ThreeDShadow !important;
 padding: 1px !important;
 background-color: Menu !important;
 }
 menubar > menu {
 border: 1px solid transparent !important;
 padding: 2px 5px 2px 7px !important;
 margin: 0 !important;
 }
 menubar > menu[_moz-menuactive="true"] {
 background-color : Highlight !important;
 color: HighlightText !important;
 }