@-moz-document url-prefix(https://news.ycombinator.com/) {
    td { vertical-align: top }
    td > img { background: repeating-linear-gradient(to right, rgba(0,0,0,0), rgba(0,0,0,0) 38px, rgba(0,0,0,0.3) 38px, rgba(0,0,0,0.3) 40px); margin-top: 4px; height: 10px !important; }
    }