Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

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Trying to recover the "old Firefox data" folder after Hard reset on windows 10

sarwarahsan081

Hello guys, so my Computer crashed and was stuck in a bootloop and I needed to hard reset it. Now my Firefox passwords,bookmarks etc are gone. How can I recover them, they are very important?

Hello guys, so my Computer crashed and was stuck in a bootloop and I needed to hard reset it. Now my Firefox passwords,bookmarks etc are gone. How can I recover them, they are very important?

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Do you still have any profile data like a backup assuming that you had to reinstall Firefox and all other applications ?

You can check if you have a C:\Windows.old folder with your Firefox profile data.

Just to clarify, which is the most like what happened:

  • power outage crash -- everything is where it was, but not working correctly
  • used the Windows Reset/Refresh feature and told Windows to save your data
  • used a recovery disk/partition to rebuild the system from scratch, nothing survived

You mentioned an Old Firefox Data folder. Do you have an Old Firefox Data folder on your Windows desktop? If so, double-click into that folder and any sub folders and check the files in the "bookmarkbackups" subfolder. These have their creation dates coded into the file names, so you can get an idea of how old they are.