title: Chrome extension: add option to right click menu when clicking certain HTML element
body: <p>I want to create a Chrome extension that adds an option to the right click menu when the user right  clicks a certain HTML element (for example a DIV with a known ID). </p>
  
  <p>I would use this to add an option when the user right clicks a tweet on Twitter.com and that option would call a REST service.</p>
  
  <p>Is this posible with a regultar Chrome extension?</p>