Redeems Amazon coupons when you view a product that has a coupon available. Discounts will appear during checkout.
Amazon has coupons but its often not obvious that a coupon is available for a particular product. This extension redeems coupons for you automatically and the discounts will be applied to the checkout.
You must be logged in to your Amazon account for this to work.
To browse available coupons, see here: http://www.amazon.com/Coupons/b?ie=UTF8&node=2231352011