Umlautdomains?

var myExt_urlBarListener = {  
   QueryInterface: function(aIID)  
   {  
    if (aIID.equals(Components.interfaces.nsIWebProgressListener) ||  
        aIID.equals(Components.interfaces.nsISupportsWeakReference) ||  
        aIID.equals(Components.interfaces.nsISupports))  
      return this;  
    throw Components.results.NS_NOINTERFACE;  
   },  

   onLocationChange: function(aProgress, aRequest, aURI)  
   {  
     myExtension.processNewURL(aURI);  
   },  

   onStateChange: function(a, b, c, d) {},  
   onProgressChange: function(a, b, c, d, e, f) {},  
   onStatusChange: function(a, b, c, d) {},  
   onSecurityChange: function(a, b, c) {}  
 };  

 var myExtension = {  
   oldURL: null,  

   init: function() {  
     // Listen for webpage loads  
     gBrowser.addProgressListener(myExt_urlBarListener,  
         Components.interfaces.nsIWebProgress.NOTIFY_LOCATION);  
   },  

   uninit: function() {  
     //Progresslistener beenden
	 gBrowser.removeProgressListener(myExt_urlBarListener);  
   },  

   processNewURL: function(aURI) {  
     if (aURI.host == this.oldURL)  
       return;  

     //Domain wurde erkannt 
     alert(aURI.host); <--- HIER IST DIE DOMANI

     this.oldURL = aURI.host;  
   }  
 };