@namespace url(http://www.w3.org/1999/xhtml);

@-moz-document domain("youtube.com"){

* {
background-color: #000000 !important;background-image: none !important;color: #999999 !important;border-color: #333 !important;}
a:link, a:active, a:visited {color: #999 !important;}
a:hover {color: lightgrey !important;}
}