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New Tabs are not opening

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After upgrading to Firefox 4, I had problems loading son my educational websites. So I decided to downgrade to 3.6.6. After 2 days of downgrading, I can't open new tabs. I press the + button, but nothing happens.

Can someone help me with this please?

Michael

After upgrading to Firefox 4, I had problems loading son my educational websites. So I decided to downgrade to 3.6.6. After 2 days of downgrading, I can't open new tabs. I press the + button, but nothing happens. Can someone help me with this please? Michael

All Replies (2)

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Uninstall the Ask toolbar and it should work again. There is a compatibility issue with the Ask toolbar and Firefox that prevents new tabs from being opened.

There are a couple of places to check for the Ask toolbar:

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This solved the problem. Thank you.