@-moz-document url-prefix() { 
    .social-line:hover .icon_shape_shadow {
        fill: url("http://static.tumblr.com/cah6mnn/xULnlc26q/firefix.svg/#icon_shape_gradient");
        fill-opacity: 0.9;
    }
    .social-line:hover .icon_circle_shadow {
        fill: url("http://static.tumblr.com/cah6mnn/xULnlc26q/firefix.svg/#icon_circle_gradient");
        fill-opacity: 0.7;
    }
    .social-shadow .icon_circle_shadow {
        fill: url("http://static.tumblr.com/cah6mnn/xULnlc26q/firefix.svg/#icon_circle_gradient");
        fill-opacity: 0.7;
    }
    .social-shadow .icon_shape_shadow { fill: url("http://static.tumblr.com/cah6mnn/xULnlc26q/firefix.svg/#icon_shape_gradient") }
    .social-filled:hover .icon_circle_shadow {
        fill: url("http://static.tumblr.com/cah6mnn/xULnlc26q/firefix.svg/#icon_circle_gradient");
        fill-opacity: 0.7;
        opacity: 1;
    }
    .social-filled:hover .icon_shape_shadow {
        fill: url("http://static.tumblr.com/cah6mnn/xULnlc26q/firefix.svg/#icon_shape_gradient");
        fill-opacity: 0.9;
    }
}