Firefox Community Forum

For years I had my Firefox sync working fine between Win10 PC, Android and several Win10 laptops. However yesterday I installed Windows 11 on the same PC I have Windows 10 (bought new disk) just to have a fresh install. Started with installing firefox - and here when problems begin. It couldn't let me log in into Sync, I was being immediately logged out ("Account disconnected"). Somehow I managed to log in, but then all my previous data was erased (passwords, bookmarks). I thought ok, maybe later it's gonna sync. Started installing extensions, saved one password. When trying to sync tabs with Android phone it didn't work, it couldn't see any tabs (but it could share tabs between devices!). On Android I still have old passwords and bookmarks saved, same as on old Win10 (on which I got logged out). Alright - it didn't sync after restart so I removed Firefox profile on machine, started again with logging in - and it synced only ONE password that I saved previously on same Win11 machine, with extensions I freshly installed back then. So it saved to sync improper data, forgetting about old? Logged out from all of my machines in Firefox Account. Now I'm back to my original machine on Windows 10. And what? I can't log in! Same error as on Win11 after install - "Account disconnected". Checked about:sync-log and found error logs - pasted into "Troubleshooting information" of this post.

Thanks

Is 'Sync Firefox data' a way to 'back-up' your browser?

(ie: Can I retrieve all my urls even if I change my iMac (etc) to a later one?) Is 'Sync Firefox data' the way to do this?

Thank you.

Hello,

I have a firefox Account "accountA" which has the primary eMail-Address "mailA". I had an other Account "accountB" with primary eMail-Address "mailB" and secondary eMail-Address "mailC". Sadly I lost access to "accountB" and it's primary Mail-Address "mailB" (which is ok) but want to change the Mail from "accountA" to "mailC".

However, this is not possible since "mailC" is locked to "accountB" which I can no longer access (since I need the primary Mail Address. This meens I can never again use "mailC" for my Firefox account, which is now my primary Mail-Address. Is there should be a way to disconnect a Mail-Address from an account, if one has ownership of this Mail-Address?

Sincerly Robin

Yesterday, I noticed after I closed and re-opened Firefox, my browsing session was completely gone - all my tabs and windows, my entire browsing history, website sign-in status, all completely gone. I've been troubleshooting since then.

I've noticed that the 'sessionstore-backups' folder in my profile folder is missing. When I open Firefox, this folder is created and Firefox writes some data to it, but Firefox seems to delete the folder as soon as I quit Firefox. Firefox should not be doing this. My Firefox is configured to open previous windows and tabs, and is NOT configured to wipe any browsing data of any kind when it closes.

As a sanity check, I spun up a Windows Sandbox (briefly, it's a clean, isolated Windows environment) and installed Firefox there. I also enabled the option 'Open previous windows and tabs'. Firefox behaves normally - it re-opens the tabs/windows I had open when I quit Firefox. Great, that's what I expect. The trouble starts as soon as I sign in to sync. After signing in to sync, and letting the initial sync process complete, I open a couple of windows and tabs, then quit Firefox. Firefox begins nuking my browsing session again - the 'sessionstore-backups' folder is erased, and next time I start Firefox, all my windows and tabs are missing, and my browsing history is missing.

So, at this point, I'm assuming something in my synced data has become corrupt. I haven't installed any new extensions lately. I haven't changed any of Firefox's settings that would cause this to happen. The only thing I have done differently lately was enable Firefox Sync in LibreWolf and sign in to sync there. It seems like this session-nuking trouble started after I signed in to sync in LibreWolf. I assumed, since LibreWolf is a fork of Firefox, and because there were no warnings or indications the feature was incomplete/unstable/experimental/etc., that it would just work, that it wouldn't cause any issues. But it seems like it has caused issues. I checked LibreWolf's issues tracker for anything related to 'sync', but I didn't see anything noteworthy.

I've been using Firefox and Sync for numerous years without issue. This session-nuking thing started yesterday.

I use Firefox in a few places, and based on what I saw happen in my Windows Sandbox, this session-nuking issue is going to happen in every Firefox I'm signed in to as soon as it has a chance to sync. Obviously, I do not want this to happen.

What can I do to determine what the issue is? What can I do to check if something in my synced data has become corrupted? What can I do to reverse it? I'm not opposed to completely wiping/resetting my synced data, but I'd rather not if I don't have to. The only thing I would lose sleep over is my bookmarks, but I know I can export them. Are there any debug logs I can enable/look at? Anything I should look for in Event Viewer?

Thanks.

I have profiles on desktop , i had enabled sync in all profiles when the feature was first introduced. the account icon always showed that it is syncing , but in the sync tab , no visited tab list appears of any profile in both the desktop .,, i installed firefox on the android today to check synchronization but its tabs never show in desktop profile and the android tells last synchronization never....neither the desktop tabs appear in android history

Hello,

Earlier today I reformatted my device but when I logged in to firefox I can only see my history is getting synced my bookmarks are empty, I've checked and bookmarks are check off and they should be synced. How do I get them to sync? It has worked fine in the past. Thanks.

Hi,

I changed my password in my Mozilla account and now I can no longer sync my firefox for android.

I scan the QR code and on my android screen proceeded normal and asking me to confirm but in my desktop I get an error.

"General application error Something went wrong. Try again later."

I also tried in safe mode with no luck.

What to do now?

I can't get open tabs to sync from my other computer. Bookmarks synced and other info but I don't see anything about tabs from other devices. I've synced both ends, both are logged in and I've selected open tabs in both. Nothing,

I have an email account blocked (jgcaller129@gmail.com) and have tried the sync tab at the top corner of my computer. It sends a message with a number to this blocked email to unblock it- how am I supposed to get an email from you on a blocked account. How do I unblock this account. I have tried several times with the same result now the icon to sync isn't there anymore. PLEASE HELP This email is very important to me. You can send a reply to an alternate email account (also linked to Firefox -jgcaller15@gmail.com).

I had issues with my computer which got me into a situation where i had to delete all partitions of my drives, starting from 0. Signing in my firefox account in a fresh win install suddenly recovers NOTHING and i am now panicking as i had very important accounts & passwords, bookmarks, tabs, extensions, etc. I have tried other devices too without any luck. I need help recovering all these asap.

My firefox crash, I uninstall and re-install. i logged to my Mozilla account and the sync does not work. I don't have my password or my bookmark.

I still have everything on my phone How can I force the sync or retrieve data in an xml/csv file ?

I recently deleted accounts and passwords that were stored in Firefox under my web browser account. Is there anyway I can get that data restored? I have access to the same email/account in Firefox, but need to restore the deleted website account/credential data.

I just got a new Mac Powerbook so I'm starting over getting all my old stuff transferred here.

I've been trying to sync my account and every time I ask for the code to be sent to my email address, it is NOT sending the code for me to use to log in!

HELP!

I had a Firefox debian version installed on my desktop running Ubuntu Ubuntu 24.04.3 LTS and now I just installed the latest 143.0.1 "Mozilla Firefox Flatpak" version.

How can I synchoronized or migrate all my data such as bookmarks, add-ons, open tabs, settings for syncing ?

Thanks in advance for prompt clear step by step answer.

I am attempting to think my mobile Firefox with Firefox on my new laptop and it's been following directions and there's no selection no choice to pick what it says I'm supposed to do