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.

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

Este fío arquivouse. Faga unha nova pregunta se precisa axuda.

cannot create firefox sync account unexpected error

  • 6 respostas
  • 13 have this problem
  • 4 views
  • Last reply by sprout

Dennis1960
Dennis1960
more options

I have a computer running windows 7 and have no problem creating a firefox sync account or logging in to it.

I have 2 computers running windows 10 and I cannot log into my firefox sync account or even create a new one with a different email address. I keep getting an unexpected error in both instances.

I even uninstalled firefox and reinstalled it........

I checked firefox server status and all is fine.

All versions of firefox I am running is 48.0

Here is my history log......I would hate to downgrade my computers to windows 7 just because of firefox sync,

There has to be something on the back end for this to be happening.

Im attaching a log of my firefox

I have a computer running windows 7 and have no problem creating a firefox sync account or logging in to it. I have 2 computers running windows 10 and I cannot log into my firefox sync account or even create a new one with a different email address. I keep getting an unexpected error in both instances. I even uninstalled firefox and reinstalled it........ I checked firefox server status and all is fine. All versions of firefox I am running is 48.0 Here is my history log......I would hate to downgrade my computers to windows 7 just because of firefox sync, There has to be something on the back end for this to be happening. Im attaching a log of my firefox

Chosen solution

For others who may want to try this.....it took me a while to figure it out but it was my home network. I simply unplugged the ISP moden for 2 mins and plugged it back it.

My work laptop was syncing at work but not at home. At first I thought it was windows 10 but it was the modem

Ler a resposta no contexto 👍 0

All Replies (6)

Dennis1960
Dennis1960 Question owner
more options

forgot to attach image

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 10 Contributor
more options

It's odd that the error in the logs seems to be no user name (error.login.reason.no_username).

Can you sign in on the website, or same issue: https://accounts.firefox.com/signin?service=sync

Dennis1960
Dennis1960 Question owner
more options

It's even more weird than that. I have a work laptop running windows 7 and can sync using my work network. When I bring it home and use my home network I get the unexpected error when I sync or try to set up a new account.

I cannot connect to firefox sync at home using my smartphone but I can sync my bookmarks at work. I can only think it has something to do with my home internet or wireless router.....makes no sense to me.

Ever heard of a problem like that?

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 10 Contributor
more options

I think this is the second or third thread I've seen where form submission behaves differently on different networks in Firefox 48. For example: https://support.mozilla.org/questions/1133493

Dennis1960
Dennis1960 Question owner
more options

Chosen Solution

For others who may want to try this.....it took me a while to figure it out but it was my home network. I simply unplugged the ISP moden for 2 mins and plugged it back it.

My work laptop was syncing at work but not at home. At first I thought it was windows 10 but it was the modem

sprout
sprout
more options

I had the same problem. I simply restarted Firefox and it worked.