Web Applications Search Engine is a Firefox extension that adds a search sidebar to search for products, airlines, hotels, new car, car rental and more. It can help to search web applications like, Amerian Airlines, United, Alaska Airlines, Continental, Orbitz, Delta and many other airline sites to compare the prices.

It also provides product search from sites like, Amazon, ebay, Target, Walmart, Best Buy, circuitcity, Macys, JR and Buy.com. It opens search results from different sites in different tabs for easy compare prices.

You can download the latest version of Web Application Search Engine sidebar from https://addons.mozilla.org/en-US/firefox/addon/5941.