We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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 have problem with my sync

more options

Hi I was using firefox 27 (32bit) with sync active , i wanted to try firefox nightly (64bit) i tried to sync it up with my existing account but i got error , so i register a new account with the same email like my existing.

When i got back to firefox 27 (32bit) and i use my account info and Firefox Recovery Key i got empty sync from your system .

Is there a way to fix my problem because i don't have other device from with i can get back my staff....

Hi I was using firefox 27 (32bit) with sync active , i wanted to try firefox nightly (64bit) i tried to sync it up with my existing account but i got error , so i register a new account with the same email like my existing. When i got back to firefox 27 (32bit) and i use my account info and Firefox Recovery Key i got empty sync from your system . Is there a way to fix my problem because i don't have other device from with i can get back my staff....

All Replies (1)

more options
  1. There's a new version of Sync in Firefox 29 and 30. which is not backward compatible with earlier versions.
  2. Did you create a new Profile for Nightly (Firefox 30)? Or did you use the same "release version" Profile?


If you didn't create a new Profile for Nightly, try creating a new Profile for Firefox 27 release now, and then see if you can recover data from your original Sync account.
https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data
https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles