Build a Chrome Extension

We would like to build a chrome extension like PriceBlink([login to view URL]) It should have the ability to do the following: - search other stores for pricing - search for coupons to use at store you are on - have ability for user to add item to a "wishlist" A case study example is let's say I am searching for a couch on Amazon. I want the extension to show other stores selling that exact same couch (example: walmart, wayfair, overstock etc.). If other store is lower price, user will go to other store. I then want user to have option to use coupons. If user does not wish to buy yet they should be able to save item to their wishlist. Now... we will make money from this tool by linking each store to our affiliate link through share-a-sale. The extension should have the ability to insert a cookie into users browser for at least 30 days so we earn sale. Also, the item on the wishlist when user adds should ensure that the sale is not lost. We can explain more details as the successful candidate is chosen.