Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

Lost all saved login data from Sync and local profile.

  • 3 replies
  • 3 have this problem
  • 8 views
  • Last reply by cor-el

impact
impact
more options

Hello, I've discovered that all my saved passwords are gone. I tried to reinstall FF ( stable, normally I use beta ) with removing local Mozilla folders and add it again to Sync. Seems there is no saved data. I found logins.json.corrupt file which is around 200 KB but I can't swap it with logins.json - this don't change anything. Is there any option to recover local or Sync login data?

What's important and I think it might be a cause of all this situation - I was testing FF Nighly 57a1 ( zip version ) and maybe this destroyed my data. Last chance for me is to recover that data from second computer ( before it sync ) but I'm worried that it has also corrupted data, because this is the place where I was testing that alpha version.

UPDATE: I've managed to recover all my data from whole PC backup ( 1 week ago - but no changes was made so it's ok ) - anyway it would be nice if You allow people to recover their data.

Greetings, Mike

Hello, I've discovered that all my saved passwords are gone. I tried to reinstall FF ( stable, normally I use beta ) with removing local Mozilla folders and add it again to Sync. Seems there is no saved data. I found logins.json.corrupt file which is around 200 KB but I can't swap it with logins.json - this don't change anything. Is there any option to recover local or Sync login data? What's important and I think it might be a cause of all this situation - I was testing FF Nighly 57a1 ( zip version ) and maybe this destroyed my data. Last chance for me is to recover that data from second computer ( before it sync ) but I'm worried that it has also corrupted data, because this is the place where I was testing that alpha version. UPDATE: I've managed to recover all my data from whole PC backup ( 1 week ago - but no changes was made so it's ok ) - anyway it would be nice if You allow people to recover their data. Greetings, Mike

Modified by impact

All Replies (3)

the-edmeister
the-edmeister
  • Moderator
more options

Yes, using Firefox 55 or above and then going back to Firefox 54 can result in lost data. Sorry that you had that issue, but using pre-release builds when you aren't very experienced with pre-release builds sometimes causes data to be lost. Nightly used to be named Minefield and the logo was a globe with a lit explosive sticking out the top for that reason.

impact
impact Question owner
more options

the-edmeister powiedział

Yes, using Firefox 55 or above and then going back to Firefox 54 can result in lost data. Sorry that you had that issue, but using pre-release builds when you aren't very experienced with pre-release builds sometimes causes data to be lost. Nightly used to be named Minefield and the logo was a globe with a lit explosive sticking out the top for that reason.

Ok, but it does not solve the issue. Is there really no option to get login data back ( sync / local fixing )? In my case it's not a problem because I had backup, but i bet that someone might have a real pain if that happen.

Modified by impact

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Did you check the logins.json file to see in what way the file is corrupted? You can open the logins.json file in a Firefox tab and see if the JSON viewer can parse this file.

Did Nightly crashed?

Note that you should always use a separate profile when you use different Firefox versions and especially when using unstable Nightly and beta builds.

See: