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

@-moz-document regexp(".*\.(p|P)(d|D)(f|F)") {
    div {
        color: #fff !important;
    }
    div.textLayer {
        background-color: #000 !important; 
        opacity: 1;
    }
    #toolbarViewer {
        background-color: black !important;
    }
    
    .annotationLayer .linkAnnotation > a:hover {
        box-shadow: none !important;
        background: #000 !important;
        opacity: 0 !important;
    }
    
    /* THis code don't work */
   /* .annotationLayer .linkAnnotation > a {
        text-decoration: underline !important;
        color: white !important;
    }*/
}