title: How to realize when a browser tab has been duplicated
body: <p>I'm having problems with a duplicate tab on Chrome (session's stuff) and I'd like to avoid the action of duplicating tabs (or lacking that close the duplicate one). I'm opening the tab as it was a popup, with no address bar, no status bar, and no nothing, just the window. There's no way to duplicate a tab (opened as a popup) in IE and Firefox (at least I havent found one), but in chrome is still possible.</p>
  
  <p><a href="https://stackoverflow.com/questions/6553334/how-to-get-the-url-of-currently-opened-tabs-in-all-browsers-with-php-or-javascri">I also know I'm not able to programmatically check if there's an already open duplicated tab</a></p>
  
  <p>Any idea how to approach this?</p>
  
  <p>thanks!</p>