After installing firefox 4 on macbook pro, firefox 3.6 comesback

First, we love Firefox! However, even though I've installed Firefox 4 repeatedly on my Macbook Pro, OS X 10.6.6, when I close my session by clicking "Quit Firefox" , I get back Firefox 3.6.16 next time I open Firefox. I.e., Firefox 4 doesn't replace 3.6.16 permanently after the initial session is closed. This never happened with other updates. Please fix! Thank you :-) Suzanne

Answer to this is to use Finder to go to the Applications folder and then drag the old Firefox to the wastebasket. Then try installing the new firefox again and it should work.

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