@namespace url(http://www.w3.org/1999/xhtml);
 @-moz-document url("about:blank") {

  * {
       background:  url("http://techfat.googlepages.com/firefox3.jpg");
       margin:0px;
       background-color:#ffffff;
       background-position:center;
       background-attachment:fixed;
       background-repeat:no-repeat;
    }
 }