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

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

div#leaderboardAd, div#sideContent, div#sideAd, div#commentsDiv, div#active_sharing_div, div#asBox, div#dVidsDiv, div#hpSideContent div.hpSideBlock:first-child, div:not(.hpContentBlock):not(.hpSideBlock) + div.hpContentBlock, div:not(.hpContentBlock) + div.hpContentBlock + div.hpContentBlock, div:not(.hpContentBlock) + div.hpContentBlock + div.hpContentBlock ~ div.hpSideBlock, span#vidDescBegin, span#vidDescMore, div.wsWrapper, div#videoStatsDiv, div#embedDiv, td#otherVidsCell > div.highlightBox { display: none !important; }
div#mainContentWithNav { width: auto !important; }
span#vidDescRemain { display: block !important; }
div#moreVideoDetailsBody { display: block !important; }
div#gNavBottom { background: #ccc !important; }
div#moreVideoDetailsBody { margin-top: .5em !important; }

}