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

@-moz-document domain("livejournal.ru") {

*[src*="ads.sup.com"], *[class*="banner"]
{

display:none !important}

}

.mod-bl div[id*="sup_ad"], .mod-bl div[id*="sup_ad"] iframe {display:block !important}