<http://schema.org/image>
<http://rack.2.mshcdn.com/media/ZgkyMDEzLzAyLzIwL2YwL2Nocm9tZXdyZW5jLjk3MWU5LmpwZwpwCXRodW1iCTEyMDB4NjI3IwplCWpwZw/0e526ca2/e8e/chrome-wrench-850.jpg>
<http://mashable.com/2013/02/19/chrome-extensions-developers/>