还有chrome目录下的两个CSS文件，可以阻断很多恼人的东西，比如闪烁(blink
)和滚动(marquee)的文字，Flash，广告，隐藏或显示一些地址栏上的按钮、闪烁的网站图标（favicon.gif），等等。
这些不像add-on那样容易，花了我不少功夫来等到我的目的，尤其是favicon，有几个网站的非常难搞掉。
UserContent.css：
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marquee { -moz-binding: none; }
blink { text-decoration: none ! important; }
/* Prevent flash animations from playing until you click on them. */
object[classid$=":D27CDB6E-AE6D-11cf-96B8-444553540000"],
object[codebase*="swflash.cab"],
object[type="application/x-shockwave-flash"],
embed[type="application/x-shockwave-flash"],
embed[src$=".swf"]
{ -moz-binding: url("http://www.floppymoose.com/clickToView.xml#ctv"); }
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UserChrome.css:
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/* Permanently show Go button */
#urlbar[pageproxystate="valid"] > #urlbar-icons > #go-button { visibility: visible !important;
}
#star-button
{
display: none !important;
}
#feed-button
{
display: none !important;
}
/*.autocomplete-history-dropmarker { display: none !important;}*/
#identity-box { display: none !important; }
/* block favicon*/
.bookmark-item[image*="favicon.gif"] .menu-iconic-icon,
.bookmark-item[image*="gif"] .menu-iconic-icon,
.bookmark-item[src*="gif"] .menu-iconic-icon,
.bookmark-item[src*="favicon.gif"] .menu-iconic-icon,
.bookmark-item[image*="favicon.gif"] .toolbarbutton-icon,
.bookmark-item[image*="gif"].toolbarbutton-icon,
.bookmark-item[src*="gif"].toolbarbutton-icon
.bookmark-item[src*="favicon.gif"].toolbarbutton-icon
.bookmark-item[image*="favicon.gif"]:not([container]) .menu-iconic-icon,
.bookmark-item[image*="gif"]:not([container]) .menu-iconic-icon,
.bookmark-item[src*="gif"]:not([container]) .menu-iconic-icon,
.bookmark-item[src*="favicon.gif"]:not([container]) .menu-iconic-icon,
.bookmark-item[image*="favicon.gif"]:not([container]) .toolbarbutton-icon ,
.bookmark-item[image*="gif"]:not([container]) .toolbarbutton-icon ,
.bookmark-item[src*="gif"]:not([container]) .toolbarbutton-icon ,
.bookmark-item[src*="favicon.gif"]:not([container]) .toolbarbutton-icon
.tab-icon-image[image*="favicon.gif"],
.tab-icon-image[image*="gif"],
.tab-icon-image[src*="gif"],
.tab-icon-image[src*="favicon.gif"]
{
width: 0 !important; padding-left: 16px !important;
background: transparent url(chrome://global/skin/icons/folder-item.png) no-repeat !important;
}
#page-proxy-favicon[src$="favicon.gif"],
#page-proxy-favicon[src*="gif"],
tab[image$="favicon.gif"] .tab-icon
{
width: 0 !important; padding-left: 16px !important;
}
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