title: Proper way to clean something when closing Chrome?
body: <p>I have an extension that need to wirte something in localStorage and clean (or set a special value) when user close the browser.<br>
  <a href="https://code.google.com/p/chromium/issues/detail?id=30885" rel="nofollow">This link</a> showing that there is no way to detect when the browser is closed.<br>
  So any suggestion?</p>