title: How to promote to install Chrome Extensions from your own website?
body: <p>When I visit some websites, on top of the browser it promotes me to install Chrome Extension by saying <code>"This website now has Google Chrome Extension... Install</code>". </p>
  
  <p>Anyone knows how to do this? Does Google already provide scripts to do this?</p>
  
  <p>Example: Visit the following site using Chrome:
  <a href="http://www.independent.co.uk" rel="nofollow">http://www.independent.co.uk</a></p>