/**************************************/
/*   about:neterror - Dark Firefox    */
/**************************************/
/*               By Wyco,             */
/*         wyco.deviantart.com        */
/**************************************/
@namespace url(http://www.w3.org/1999/xhtml);


@-moz-document url-prefix(about:neterror) {
html {
    background-image: url(image_url_here) !important;
margin:0px;
background-color:#352C2D !important;
background-position:center !important;
background-attachment:fixed !important;
background-repeat:no-repeat !important;
}
   

#errorPageContainer {
    background-image: url(image_url_here) !important;
background-color:#4e565c !important;
background-position:center !important;
background-attachment:fixed !important;
background-repeat:no-repeat !important;
color: #d6f0ff;
} 
 }