rem: var url = retrieveURLFromData(aXferData.data, aXferData.flavour.contentType); if (!url) 
add: var url = transferUtils.retrieveURLFromData(aXferData.data, aXferData.flavour.contentType); if (!url || url.search(client.linkRE) == -1) 
context: function tabdnd_drop (aEvent, aXferData, aDragSession){    var url = retrieveURLFromData(aXferData.data, aXferData.flavour.contentType);    if (!url)        return;        if (url.search(/\.css$/i) != -1  && confirm (getMsg("tabdnd_drop", url)))    {        onSimulateCommand("/css " + url);    }    else if (url.search(/^irc:\/\//i) != -1)    {        gotoIRCURL (url);    }}
meta: 1567	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1567/47ad8e3fd9ff9a2a94fa4badc6e742daab703f44/static.js/buggy/xul/content/static.js