Scheduled maintenance: Thursday, September 24, between 11:30am and 13:30pm UTC. 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

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

Can't login firefox sync

  • 2 replies
  • 1 has this problem
  • Last reply by cor-el

more options

I can't login to firefox sync with correct account and password. I have tried to reset the password and it keep showing unexpected error, now, I even can't create a new account. Could someone tell me how to solve this problem? Thanks a lot.

All Replies (2)

more options

Keep showing unexpected error....

more options

In case of issues try to log in to the Firefox Account via this website.

In case of issues with Sync you can try this:

Disconnect from Sync and Reconnect to Sync again. You can disconnect from Sync by clicking the e-mail address in the "3-bar" Firefox menu button drop-down list or go to "Options/Preferences > Sync".

Delete the signedInUser.json file in the Firefox profile folder and delete the Weave folder (Sync was formerly named Weave) with Firefox closed.

Remove an existing chrome://FirefoxAccounts entry in the Firefox Password Manager.

If that isn't enough then delete the prefs.js files to reset all prefs and maybe also delete the compatibility.ini file to reinitialize the profile.