This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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

I updated Windows and lost settings and 99.9% of logins

  • 1 cavab
  • 1 has this problem
  • 1 view
  • Last reply by CiaoBella1

more options

Not sure what happened or why, but almost all settings disappeared - logins, passwords, preferences for page size (+/-), etc. overnight after updating Win10.

I did not uninstall the update, which I think I will do after posting this.

How do I fix this?


I copied logins.json and key4.db from one day prior, - 2/6 - but the 2kb of data were not helpful.


I switched profiles on Friday (I think), after dealing with constant errors - a page is slowing down your browser, or a script is slowing down your browser. Firefox update was on Friday - 85.0.1. A damned mess, if you were to ASK ME.

Not sure what happened or why, but almost all settings disappeared - logins, passwords, preferences for page size (+/-), etc. overnight after updating Win10. I did not uninstall the update, which I think I will do after posting this. How do I fix this? I copied logins.json and key4.db from one day prior, - 2/6 - but the 2kb of data were not helpful. I switched profiles on Friday (I think), after dealing with constant errors - a page is slowing down your browser, or a script is slowing down your browser. Firefox update was on Friday - 85.0.1. A damned mess, if you were to ASK ME.

All Replies (1)

more options

I amend this: Windows10 was not updated, Microsoft 2010 was updated on Friday - 2/5, even though I hit *install* only LAST NIGHT, 2/6.

Since it expired and no support has been given since November, I think, how in the world????

Looking to see where the mess is, along with why I have contradictory evidence, to say the least.

Thank you.