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

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

*[src*="doubleclick"],
#ad_creative_1,
#google_companion_ad_div,
#default-language-box,
.homepage-content-block,
#side-announcement-box,
#homepage-side-content,
#chrome-promo,
#watch-channel-brand-cap
{display: none}

#watch-video-container {
background-color: #FFFFFF !important; }

.flash-player {
height: 568px !important;
width: 960px !important; }

#watch-sidebar {
margin-top: 0px !important; }

#watch-headline-user-info,
#footer-container,
.comment-highlight-section-header
{display: none}

#search-related-terms,
.channel-cell,
.ruv-alt-query,
.ruv-entry,
#REC-titlebar
{display: none}

#results-main-content {
float: none !important;
margin: auto !important; }

#homepage-main-content {
float: none !important;
margin: auto !important; }

.yt-uix-pager {
text-align: center !important; }

#masthead-nav-user,
#masthead-nav-main,
#watch-video-response,
#watch-stats-data-wrapper,
#watch-video-responses-children,
#watch-video-responses-actions,
#watch-branded-actions,
#footer,
#copyright,
#watch-promoted-videos-container,
#watch-longform-text,
#search-duplicates-message,
#search-pva,
.playlist-cell
{display: none}

}