title: Facebook Javascript SDK: FB.login() doesn't work on Firefox/IE
body: <p>I'm building a very simple facebook application that just fetches a user's notifications from Facebook and also allows them to login. The URL is: <a href="http://widget.sidepage.co/_jump_frame.html" rel="nofollow">http://widget.sidepage.co/_jump_frame.html</a></p>
  
  <p>This works perfectly on Chrome - where the user is allowed to log in and authorize the app through a standard Facebook popup and once the app is authorized, it works well.</p>
  
  <p>The problem is, on Firefox, clicking on the Facebook icon on the widget only opens a blank tab. There are no popup blocker warnings or JS errors thrown at the console.</p>
  
  <p>Any pointers on how to fix this?</p>