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

@-moz-document url-prefix("http://d.hatena.ne.jp/foreplay/") {

h1 img{display: none !important;}
h1{background: url(http://bater.biz/img/ogurayuko.jpg) no-repeat center !important; height: 300px !important;}

}