title: what is the equivalent option for displaying a notificationbox in chrome extension like in firefox addon
body: <p>I am developing extensions for a site for major three browsers (FF,Chrome,IE).
  I started with firefox and now working with chrome.
  I want to know how to implement an option like the firefox xul notificationbox <a href="https://developer.mozilla.org/En/XUL:notificationbox" rel="nofollow">https://developer.mozilla.org/En/XUL:notificationbox</a> in chrome?</p>
  
  <p>How to display the do you want to save password panel in chrome like in firefox notificationbox?</p>
  
  <p>I inspected LastPass and found that they are injecting a div inside the body tag as the first child of the body tag. is that the way it has to be ? or some other option?</p>