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My Firefox Icon Book marks History etc completely disappeared. I have no account. there was a question mark where the Icon was Please help!!!

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My Firefox Icon, Book marks, History, everything completely disappeared. I have no account. there was a question mark where the Icon was Please help!!!

My Firefox Icon, Book marks, History, everything completely disappeared. I have no account. there was a question mark where the Icon was Please help!!!

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Although the issue may not have specifically occurred after any Firefox update, the steps on the Recover user data missing after Firefox update page should help solve your problem.

Hope this helps.