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I accidenly deleted my personal data when I deleted firefox. Is there any way I can retrieve my personal data back?

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So basically what it says above. But another question if I have other users on my computer and they have Firefox is it possible to recover my personal data to or from these other users?

So basically what it says above. But another question if I have other users on my computer and they have Firefox is it possible to recover my personal data to or from these other users?

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You could try using a file undelete utility program like Recuva.

Other user accounts on the same PC are gonna have their own personal data, not yours.