title: Hidden/invisible Ajax request?
body: <p>Is it possible to write and create a JavaScript Ajax request witch cannot be catched by the Firebug plugin in Firefox?</p>
  
  <p>I'm asking this because I can see on Facebook that there are no Ajax request going on, but still when I sent a message from another Account, the message box on the top will add the "1 unread message" indicator... How's even this possible to achive?</p>
  
  <p>Thanks.</p>