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After updating to FF 7, after every 2 or 3 restarts of the browser the persona or the theme becomes disabled. And the Browser restore the default theme!! Tried it many personas and themes and always got the same problem.

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The browser restores the default theme after 2 or 3 restarts. This never happened before updating to FF7. I didn't change my security software, so it is the same software that was before updating and cannot be the problem. I'm using: Avast Pro 6 , Zone Alarm firewall free, Malwareytes.

The browser restores the default theme after 2 or 3 restarts. This never happened before updating to FF7. I didn't change my security software, so it is the same software that was before updating and cannot be the problem. I'm using: Avast Pro 6 , Zone Alarm firewall free, Malwareytes.

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Thanks for your reply. I tried to remove the preferences file from my profile and then resetting all my preferences to default. Unfortunately, that didn't work. This happened only with FF7. Until the last days of FF6, everything was fine.