rem: canHandleContent: function(contentType, command, desiredContentType) 
add: canHandleContent: function(contentType, isContentPreferred, desiredContentType) 
context:     canHandleContent: function(contentType, command, desiredContentType)    {        var docShell = this.contentWindow.docShell;        var contentListener;        try {            contentListener =                docShell.QueryInterface(Components.interfaces.nsIInterfaceRequestor).getInterface(Components.interfaces.nsIURIContentListener);        } catch (ex) {            dump(ex);        }        if (!contentListener) return false;                return contentListener.canHandleContent(contentType, command, desiredContentType);    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/5e626fd43693e1c2adc3470dcabdc84589a9e643/nsBrowserContentListener.js/buggy/xpfe/browser/resources/content/nsBrowserContentListener.js