Firefox users can now use the brilliant Wolfram search engine alongside Google.
Google and Wolfram on the same page
This is possible through a new Firefox add-on that displays search results from Wolfram Alpha in a neat sidebar whenever you perform a search on the main Google website.
You can use this to compare Wolfram Search with Google and the nice part about the add-on is that it auto-hides Wolfram from Google pages where there are no Wolfram results available for a particular search query.
All results pages on Wolfram can be downloaded in PDF format. Give it a shot.
Compare Wolfram with Google