On Aug 14th 11 PM ET/Aug 15th 03:00 UTC, due to scheduled Firefox Account server maintenance, users may not be able to sign in or create a new subscription. This is expected to last approximately 30 minutes. Status updates can be found at https://status.vpn.mozilla.org or https://status.relay.firefox.com.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Lolu chungechunge lwabekwa kunqolobane. Uyacelwa ubuze umbuzo omusha uma udinga usizo.

Passwords saved in Mozilla

  • 5 uphendule
  • 1 inale nkinga
  • 2 views
  • Igcine ukuphendulwa ngu cor-el

more options

I reset windows 10. When I went online all my passwords in Mozilla were gone.

I reset windows 10. When I went online all my passwords in Mozilla were gone.

All Replies (5)

more options

When you reset the computer, did you select to save your data?

Open your user folder and look for a folder called Windows.old

more options

Thank you Fred. I found the User Old file. Nothing there for Mozilla passwords but I learned about a different folder. My FB page was also destroyed.

Okulungisiwe ngu Cooleyedbabe

more options

I'm not sure how far you got into the Windows.old folder.

First, make sure Windows shows you hidden files and folders. This article has the steps for that setting: https://support.microsoft.com/en-us/windows/show-hidden-files-0320fe58-0117-fd59-6851-9b7f9840fdb2

Next, explore up this path:

C:\Windows.old\Users\<username>\AppData\Roaming\Mozilla\Firefox\Profiles

At that point, you should find one or more profile folders.

Do any of these have recent files? If so, let me point you toward a thread with the specific steps for "transplanting" an old folder into your live Profiles folder of your running installation of Firefox so that Firefox will recognize and use it:

https://support.mozilla.org/questions/1321847

If that doesn't work, then copying individual files might be needed.

more options

Did you backup your personal data stored in the profile folder or were you using Sync and relied on Sync to restore the logins ?

Note that Sync isn't designed to be used as a backup, but is merely meant to sync data between connected devices. Best is always to backup your personal data locally.

You can check if you have a C:\Windows.old folder.

more options

You can copy certain files with Firefox closed to the current profile folder to transfer or recover personal data. Note that best is to avoid copying a full profile folder.


  • bookmarks and history: places.sqlite
  • favicons: favicons.sqlite
  • bookmark backups: compressed .jsonlz4 JSON backups in the bookmarkbackups folder
  • cookies.sqlite for the Cookies
  • formhistory.sqlite for saved autocomplete Form Data
  • logins.json (encrypted logins;32+) and key4.db (decryption key;58+) for Passwords saved in the Password Manager
    key3.db support ended in 73+; to use key3.db in 58-72, make sure to remove key4.db
  • cert9.db (58+) for (intermediate) certificates stored in the Certificate Manager
  • persdict.dat for words added to the spell checker dictionary
  • permissions.sqlite for Permissions and possibly content-prefs.sqlite for other website specific data (Site Preferences)
  • sessionstore.jsonlz4 for open tabs and pinned tabs (see also the sessionstore-backups folder)