e-Sim Stylish guide by DM

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

@-moz-document domain("e-sim.org") {

body {
background-size: cover !important;
background-color: black !important;
background-position: center !important;
padding-top: 45px;
padding-bottom: 10px ;
background: url('HERE YOU MUSH PLACE THE URL OF IMAGE YOU WANT. IT MUST CONTAIN HTTP://') #000 no-repeat fixed !important;
}

}