Custom Website with Browser Button

Design is already complete so I need the follow integrated. Specs - Users can create lists where they can add items to there list by ether searching the web and using the a button that is placed in your toolbar (similar to amazon button). You can go to any website and once u select the item you click the button and then a window pops up that auto fills the name of the product, price, quantity as texts fields that can be edit. There is also a box below that the user can add comments. There will be a button that says add to list. After clicked it will add to your list on the site. - Users will have option to dive down in 8 categories (Electronics, Clothing, VIdeo Games, Gift Cards, School Supplies, Sporting Gear, Toys and Other Items (We will add more categories)) to find things that they want. Once they find the store they want it will take them to that site to add it to the list. I would also like to add a search where people can search for items through all the sites that are added such as Best Buy, Toys R Us, Radio Shack etc. This would possibly have to be done through each sites API? Use this site for example. - Users sign up and have a profile that has Name, Shipping Address (can be different for each list that is created), Email, Birthday, Bio - Users can have multiple lists and create lists for family and friends. - Users can search through all lists or each individual list. - Integrate amazon and bay's APIs to be able to search on site. - Each list needs to have 3 options: 1) Public, 2) Private, 3) Only if have a link - Attached how amazon works… and things I would like to have added to the site that deal with the button in the tool bar. - Attached is profile page and search ([login to view URL]) Please message me if you have any questions.