if (uri.spec) 
if (uri instanceof nsIURI) 
    isURIDenied: function(uri)    {        if (!uri)  // null or undefined is denied            return true;        var url  =  uri.spec ? uri.spec : uri;        if (isSystemURL(url) && !Firebug.allowSystemPages)            return true;        if (uri.spec)        {            if (pm.testPermission(uri, "firebug") == DENY_ACTION)                return true;        } // else we cannot test! TODO        if (FBL.isLocalURL(url) && this.disabledFile)            return true;        return false;    },
2454	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/2454/5da1c8b018cf62f6e1c25d1879f31f9fb68401bb/firebug.js/buggy/extension/content/firebug/firebug.js