title: How to call "Save Image As..." feature in Chrome Extension?
body: <p>Chrome extension library has knifty feature to call download method...however such callback doesn't enable us to script for the behavior when we right click an image - in fact it won't activate when right click on an image (would if it is a link).</p>
  
  <p>What is Chrome's extension command that allows us to call for downloading an image? Thanks.  </p>