title: Chrome extension - For facebook to block 'seen at' in Messages
body: <p>I was going through a few Chrome extensions that claim to disable the 'Seen At' feature of facebook messages.</p>
  
  <p><a href="https://i.stack.imgur.com/dnp1C.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dnp1C.png" alt="Seen at"></a><br>
  <sub>(source: <a href="http://thetecnica.com/wp-content/uploads/2013/01/Capture.png" rel="nofollow noreferrer">thetecnica.com</a>)</sub>  </p>
  
  <p>How can this be achieved from a Chrome extension considering the fact that the extension gets executed in its own isolated world?</p>
  
  <p>I understand that this can be achieved using the Graph API but was wondering how this works with just UI?</p>