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Two tabs open on launching Firefox. How to get to only one?

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Just downloaded the new Firefox 4. Now each time I start it checks for Add-on Compatibility and opens two tabs: My home page and the firefox whats-new tab also. So how do I get it to just open my homepage? Also, I tried downloading version 4 again and still opens the two tabs.

Just downloaded the new Firefox 4. Now each time I start it checks for Add-on Compatibility and opens two tabs: My home page and the firefox whats-new tab also. So how do I get it to just open my homepage? Also, I tried downloading version 4 again and still opens the two tabs.

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Check the Home page setting:

See also:

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Finally figured out the problem. Had to delete not only the pref file but also the user file in firefox. Then when I restarted was back to normal with only my home page loading......