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

.wsHeading, .v75WrapperOuter, .v75WideEntry, #commentsDiv, #footTopDiv, #sharingImg, #iconMail, .currentFlag, #leaderboardAd, #hpMainContent, #hpSideContent, .search
{
display: none !important;
}
.headerTitle a
{
color: #FFFFFF !important;
}
a
{
color: #000000 !important;
}
a:hover, .actionText
{
text-decoration: none !important;
}

}