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i have many saved password on ff after i have install program i dont know what is this, after i restart my pc i lost all my password if i restart firefoxf no password lost , i try to reintalling ff and uninstall the program that maybe caused the problem until now i lost my password after restart my pcsomebody help me

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You will need to do the following:

  • Locate the backup of your previous profile. See - you will need to manually adjust for the location of your backup, and shortcuts like %APPDATA% won't work (On Vista/7, %APPDATA% is defined as C:\Users\Username\AppData\Roaming)
  • Locate your new profile. See above, but here you can just use the button from Help -> Troubleshooting Information
  • Copy the following files from the old profile to the new profile, with Firefox closed: key3.db, signons.sqlite


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i have do the steps i have my password but after i restart my pc the password lost again

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So your preferences files corrupted