Chrome Extention to add a button to amazon

This is for a simple google chrome extention. It needs to add a button whenever the user is browsing a product on amazon. The button is here: [login to view URL] The button should link to [login to view URL] for the current product the user is browsing. For example if the user is browsing this product: [login to view URL] The link should take the user to [login to view URL] The code should be simple and straight forward with comments.