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.

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

Wo archive tread sia. Meɖekuku bia biabia yeye ne ehia kpeɖeŋu.

How to recover lost sync data?

  • 1 ŋuɖoɖo
  • 2 masɔmasɔ sia le wosi
  • 13 views
  • Nuɖoɖo mlɔetɔ Michael Buluma

atulmittal0109
atulmittal0109
more options

I installed an older version of Firefox and when tried to sync, it was asking for sync key. I accidentally changed the key and sync failed. I then, updated to the latest Firefox version and tries to sync again. Sync is working properly but there is no any data to sync. There were many bookmarks, passwords and other data in my old FF profile but I guess, they are lost now. ANy way to recover them back?

I installed an older version of Firefox and when tried to sync, it was asking for sync key. I accidentally changed the key and sync failed. I then, updated to the latest Firefox version and tries to sync again. Sync is working properly but there is no any data to sync. There were many bookmarks, passwords and other data in my old FF profile but I guess, they are lost now. ANy way to recover them back?

All Replies (1)

Michael Buluma
Michael Buluma
  • Locale Leader
more options

atulmittal0109 said

I installed an older version of Firefox and when tried to sync, it was asking for sync key. I accidentally changed the key and sync failed. I then, updated to the latest Firefox version and tries to sync again. Sync is working properly but there is no any data to sync. There were many bookmarks, passwords and other data in my old FF profile but I guess, they are lost now. ANy way to recover them back?

hello and so sorry to hear about the issue you are having.

If you are using a new sync account now (FF 29>) in the new installation and had older sync installed in your windows machine then you need to install old Firefox again to sync.

Also do note that sync requires you to keep both of the machine turned on at the same time.

If you have your recovery key then you can use that to pull down the information from Sync and get it onto your new machine.

Also note you can't Sync between devices with the new Sync version and the old Sync version. You will have to update all devices to Firefox 29 or later to be able to use the new Sync, so you need to install a beta or Aurora Firefox version on the Android device as well.