Firefox Community Forum

I tried using Firefox on a new device, I wanted to sync with my previous settings to just restore them, I was unable to remember the password at that time so I reset it, after resetting it it still didn't work and different problems came up so I tried fixing it in a different way. Long story short im unable to connect my current profile (which I used previously with that email) with that account, so im also unable to start any ways of syncing as only this message appears

"This profile was previously synced to a different account

To keep your data organized and secure, each Firefox profile can only be synced to one account. To sign in using email, create a new profile."

Right now im just using a backup which basically restores the profile, but if im doing something on one device it shouldnt sync to the other one, whats the best way of fixing it, is there a way of desyncing the profile with the mozilla account or start a fresh profile but slightly alter some values so I can use this one?

Kind Regards

Hi,

I recently noticed an unknown Outlook/Microsoft account (oliveconscious13@outlook.com) saved in my Firefox logins. The email and password appear to be randomly generated, and the account’s preferred language is set to Russian. I have never seen or used this account before.

Here are the key details:

My Firefox account was created on June 8, 2025.

The unknown Microsoft account was created on July 8, 2025.

I only have two devices connected to my Firefox account: my Mac (where the account first appeared) and my Windows PC.

The account is also showing up in Chrome’s saved passwords, which I never intentionally synced with Firefox.

This is a brand-new Mac purchased directly from Apple, so I know it wasn’t a used device.

I’m trying to figure out:

How this account was added to my saved logins.

Whether this was synced from another device.

If there’s any security concern or if my account may be compromised.

Could you check my sync history or logs to see which device added this login, and advise on how to make sure my saved logins are secure?

I recently bought a new computer, and I'm trying to get everything transferred from my laptop to it. I have a Firefox account, am signed in on both devices, sync is turned on, and passwords are set to sync. I don't know how, but all of my passwords are on my new computer, but not on my laptop and I can't figure out how to get them back. Maybe I messed something up trying to get all of my tabs transferred? It wouldn't be a problem if I was completely done with my laptop, but I'm still going back and forth between the two.

Also, it seems that the passwords on my new computer aren't the most up to date, as I'm signed in to several websites on my laptop, that won't accept the passwords on my new computer.

I would really appreciate any help getting this all straightened out.

Hello Mozilla Support Team,

I hope you can assist me with an urgent issue. After reinstalling Windows on my PC, I lost access to my Firefox Sync data, which includes years of bookmarks, saved passwords, and browsing history.

Before formatting, I had been using Firefox Sync with my Firefox Account (sometimes signed in via Google). However, after reinstalling Windows and logging back into Firefox Sync, my data no longer appears. At one point, I saw my account showing activity from just before formatting, but now that is gone as well.

I am worried that my synced data might have been overwritten or lost during this process. Unfortunately, I do not have a local backup of my Firefox profile.

Could you please help me: - Verify if my Firefox Sync data is still stored on your servers. - Assist with recovering my synced data or advise on next steps I can take. - Provide any guidance on preventing data loss in the future.

Thank you very much for your help. I look forward to your response.

Best regards.

hello i tried to synс FoxyProxy via FF Add-On Sync a expected proxy options transferred to another notebook but nothing happens

checked add-on sync on both notebooks - is on help me pls

Vasil Akhmetov