title: DOM Window unload event, is it reliable?
body: <p>Can I rely on the window unload event to be triggered when a user closes a tab/window/browser?</p>
  
  <p>Edit:</p>
  
  <p>Found a list of what triggers the unload event in IE. <a href="http://msdn.microsoft.com/en-us/library/ms536973%28VS.85%29.aspx" rel="nofollow noreferrer">http://msdn.microsoft.com/en-us/library/ms536973%28VS.85%29.aspx</a></p>
  
  <p>I would like to know in which edge cases the unload event won't be triggered.</p>