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

@-moz-document domain("extra.hu") {
span[style='font-size: 9px; position: fixed ! important; bottom: 0px ! important; right: 0px ! important; z-index: 9999 ! important; opacity: 0.7 ! important; display: block; visibility: visible;'] { display: none !important;}
}