Interesting, and concisely put. Now I'm wondering whether FF users are obliged to use google (the same way we get obliged to turn off adblock on sites we don't wish to hurt).
I'm pretty sure at least Bing has a revenue sharing program with Mozilla for search results from the search bar (they did as of Firefox 4[1], at least). Google just won the auction to be the default. Not sure about the other default search engines, though.
