title: How to detect refresh of a webpage in chrome extension
body: <p>In chrome extension - chrome.tabs does not have any direct event to be fired when a page is refreshed on a particular tab.
  We do have an onUpdated event which passes all the changes as arguments in its callback that has taken place since the last update when fired. </p>
  
  <p><code>Is there any way of detecting through changes in the onUpdated event or in any other event to precisely detect the event of the page getting refreshed in a particular tab</code></p>