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

@-moz-document url("about:blank") {

  * {

    margin: -22px 0px 0px -22px;

    overflow: hidden;

  }

  body:after {

    content: url("http://igreen.ir.funpic.de/Smilie.jpg");

    opacity: 5. ;

  }

}