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

@-moz-document domain("wassr.jp") {
    .favorite_button {
        width: 0px !important;
        height: 0px !important;
        padding: 16px 16px 0 0 !important;        
    }
    .favorite_button[title="イイネする"],
    .favorite_button[alt="not favorite"] {
        background-image: url("http://wassr.jp/img/pictogram/ED65.gif") !important;
    }
    .favorite_button[title="イイネを取り消す"],
    .favorite_button[alt="favorite"] {
        background-image: url("http://wassr.jp/img/pictogram/ED69.gif") !important;
    }
}