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

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



  * {

       background:  url("http://reshade.com/resize/constrain/centercrop/image-50215315-1440x900");

       margin:0px;

       background-color:#000000;

       background-position:center;

       background-attachment:fixed;

       background-repeat:no-repeat;

    }

 }