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

@-moz-document domain("flashback.org") { 
} 
.banner_text { 
    visibility: hidden !important; 
    width: 0 !important; 
    height: 0 !important; 
} 
div#top-news,
div#top-banner, 
div#top-banner-container,
div.fb_adsys_wrapper_TextAds, 
div#bottom-banner-container,
div#site-right > a,
div#site-right > div.banner-scroll,
div#site-right > div.break,
div#site-right > break,
div#site-right > div { 
    display: none !important; 
} 

div#site-right > div.box-right:first-child { 
    display: block !important; 
}