So, this script doesn't seem like it's been updated in a long while. DuggMirror no longer seems to work, and I discovered a great new mirroring site called rorr.im, so I decided to fiddle with the script and add it:

var rorrimicon = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAALCAYAAACprHcmAAAABGdBTUEAALGPC/xhBQAAAMNJREFUKFONkD0OwjAMhcspGBhQz8I14Eqg0g50RZSRhYWBHgBGEEsHoGKhEhISA1v8cH5JSwcsWYmVz88v7oAj+DckbIP4Qrs7KD2Bjg/I2o/AgcUT6C14zJQz5oyAcAm6vhyvYKXYnRtoxqfNGNTP3AQFi/ymlRSUeinrCOKi1TU8OXiqTTiGWJ09eF8Zr23KCYTx/fUcZp4V63kMMcrrH1Sf5G4arI0duY0ENNyCqvcv7FZYctOmrEH2ze25sf/W8gOGoHiapQHj7gAAAABJRU5ErkJggg==";

and then, under the addIcons function:
//add rorr.im cache link
anchor = document.createElement("a");
anchor.href= dugglink;
anchor.href = "http://rorr.im/" + dugglink.substring(7);
anchor.target = target;
anchor.title = "rorr.im";
anchor.innerHTML="<image src=" + rorrimicon + ">";
container.appendChild(anchor);

Oh, and thanks a lot for the script! It's awesome!</image>