html.mobilify {
    margin-top: 118px !important;
}
.mobilify body {
    width: 320px;
    position: relative;
    left: -moz-calc(50% - 160px);
}
.mobilify body:before {
    content: "";
    background: url(http://people.mozilla.org/~mclaypotch/nexus_s_frame.png);
    display: block;
    width: 408px;
    height: 785px;
    border: 500px solid black;
    position: fixed;
    top: -510px;
    left: -moz-calc(50% - 703px);
    z-index: 9999;
    pointer-events: none;
}
html.mobilify:before, html.mobilify:after {
    content: "";
    display: block;
    position: fixed;
    height: 100%;
    width: -moz-calc(50% - 160px);
    background: black;
    top: 0;
    left: 0;
}
html.mobilify:after {
    right: 0;
    left: auto;
}