Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

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

"Unexpected error" on sign in on only one device

  • 2 uphendule
  • 1 inale nkinga
  • 31 views
  • Igcine ukuphendulwa ngu zoe.eriksen
  • Open

I'm really stumped and confused why this would be, but, I'm unable to sign in to my account on one of my devices, though I can access it from other devices.

I have a work computer and a personal computer. I want to have a profile on my personal computer signed into a an account I share on my work computer so I can easily access tabs and history across my these to devices that's separate from my main firefox account attached to my personal email. Got the profile signed in on my personal computer, went to sign in on my work computer and got a message "unexpected error." I attempted to disable the extensions and clear cache at the advice of one thread I saw from years ago but I really have had a heard time finding anyone with this issue at all.

Anyway, any help would be appreciated! Thanks!

I'm really stumped and confused why this would be, but, I'm unable to sign in to my account on one of my devices, though I can access it from other devices. I have a work computer and a personal computer. I want to have a profile on my personal computer signed into a an account I share on my work computer so I can easily access tabs and history across my these to devices that's separate from my main firefox account attached to my personal email. Got the profile signed in on my personal computer, went to sign in on my work computer and got a message "unexpected error." I attempted to disable the extensions and clear cache at the advice of one thread I saw from years ago but I really have had a heard time finding anyone with this issue at all. Anyway, any help would be appreciated! Thanks!

All Replies (2)

Hi,

Sorry to hear that. Here are some standard troubleshooting steps that may resolve the issue:

  1. Please check if you have Enhanced Tracking Protection (ETP) enabled. You can do that by clicking the shield Fx89ShieldIcon icon in the left part of the address bar.
    • If ETP is enabled, try disabling it.
  2. If the problem is not fixed, try clearing Firefox cache.
  3. If it does not help, try clearing cookies and data for the website you experience troubles with (warning: you will be logged out on this website).
  4. If it also does not help, try running Firefox in Troubleshoot Mode. If the problem doesn't persist, please follow the steps from this article to troubleshoot further.
  5. If nothing from the above helps, try creating a new Firefox profile and check if the issue persists there. If it doesn't, you can start copying files from your old profile to the new one to identify which one causes the issue. See this article on what files to copy.

Does any of the above help? Looking forward to your update on how it goes!

hi, thank you for your reply. None of that solved my problem

Just turned off ETP and tried in troubleshooting mode, same error. As I sated in my original post, last night I already tried suggestions 2, 3, and 5.

Denys said

Hi, Sorry to hear that. Here are some standard troubleshooting steps that may resolve the issue:
  1. Please check if you have Enhanced Tracking Protection (ETP) enabled. You can do that by clicking the shield Fx89ShieldIcon icon in the left part of the address bar.
    • If ETP is enabled, try disabling it.
  2. If the problem is not fixed, try clearing Firefox cache.
  3. If it does not help, try clearing cookies and data for the website you experience troubles with (warning: you will be logged out on this website).
  4. If it also does not help, try running Firefox in Troubleshoot Mode. If the problem doesn't persist, please follow the steps from this article to troubleshoot further.
  5. If nothing from the above helps, try creating a new Firefox profile and check if the issue persists there. If it doesn't, you can start copying files from your old profile to the new one to identify which one causes the issue. See this article on what files to copy.
Does any of the above help? Looking forward to your update on how it goes!
Buza umbuzo

You must log in to your account to reply to posts. Please start a new question, if you do not have an account yet.