Firefox Community Forum

I installed firefox on other PC and I logged in with my account. Despite having synchronization for passwords, bookmarks, etc., I can't sync my data on my new PC. Why is that?

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.

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.

Hello Firefox Support Team,

I am facing an issue with Firefox Sync. I have logged in using the same Firefox account on my new device (or after reinstalling), but my bookmarks, saved passwords, and other synced data are not appearing.

I have tried signing in again, checked my internet connection, and confirmed that I am using the correct Firefox account. Despite this, nothing is syncing.

Please help me restore my synced data. I would really appreciate your support.

Thank you, Shubham Sen

I made sure to sign in and hit sync on my browser prior to moving over to my new computer. I've logged in on my new computer and manually hit the sync button but my passwords and bookmarks are not populating.

I reset Windows yesterday to attempt to fix a problem with my computer. After redownloading Firefox and signing into a few basic things (including my Mozilla account), I realised all my logins were gone. I have followed the steps in [[this tutorial|https://support.mozilla.org/en-US/questions/1310179]] but it didn't work - I think saving logins in this instance of Firefox overwrote the other logins file, as when I opened it, it only had the login info from what I logged into after I reset.

Looking at my connected services, it seems the instance of Firefox from before I reset is still open. I mention this just because it's possible that this would contribute to a solution.

Any help is greatly appreciated as I have a number of securely generated passwords and cannot access a good deal of my accounts.

Hi, I switched to a new phone recently, and wasn't able to outright sync all of my open tabs from the old device. It was, however letting me access them from the tab menu on my new device, so it wasn't a big deal.

Now I can't see the other phone in the tab menu, just the sync from my PC. I don't have the old phone anymore, because it was a trade in for my current device.

Is there any way to get my old tabs back? The sync must have timed out, because there was no activity for a period of time. I have Firefox synced on all of my devices.

Thank you.

I know the answer to this is probably going to be along the lines of this is not possible, but I thought I'd ask anyway since none of the information is entirely clear. Or answers my exact question.

I have one desktop install of firefox and I have two android ones. I have all three synced to one firefox account, so it's easy to grab links I saved while wiki diving on something. While this works perfectly for the desktop side of things, the mobile side is where the issue arises.

Currently all my bookmarks from both mobile firefox accounts are merged into one long set, regardless of device. While the desktop ones have their own folder. Is there a way to keep the bookmarks from each device in their own separate folder? Like say instead of having one big mobile bookmarks folder, having one named DeviceX, and the other DeviceY?

It's still semi functional on desktop where I have more screen real estate and have to deliberately go to the mobile bookmarks folder, but on the phones it can be confusing when a set of bookmarks from device 1 mixes randomly into those of device 2. As it can become a lot harder to keep track of things.

Now I know one can turn off syncing of bookmarks. This is not what I'm looking for as I do still want to be able to share them between all three devices. Just have them more organised.

I also know one can make different accounts for say work or personal, but again I want them all to sync, just not mix them into one list.

So in short is there a way to be able to have two android devices into a threeway sync and keep the bookmarks separate? Or is my only option the round abound way of making subfolders and hope I remember to save in those?

Thanks either way.

When you check the image, you can see two "HOME" entries. This is an issue I discovered after uninstalling and reinstalling the Firefox browser and using Sync.

HOME is my PC, and this image was screenshot on my laptop.

Additionally, the Sync for these HOME entries is not functioning properly. I tested this by opening several sites, and while Sync works well from my smartphone to my PC, it doesn't sync properly from my PC to my laptop.

Does anyone know how to solve this problem? I tried rebooting my PC, but it didn't work out.

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

Since Mozilla no longer supports Lockwise, I am trying to sync my iPhone to my laptop to get all my passwords. INstructions tell me "Sync Firefox on your phone or tablet 1. Open Firefox on your mobile device. 2. Go to the menu ( on iOS or on Android) and tap Sync and save data 3. Tap Ready to Scan and hold your phone over this code" First of all, this choice does not exist in the iPhone Firefox menu. If I go into "Settings" and press "Sync now" none of my passwords show up within Firefox. Please help. Thank you.

I use Sync on multiple computers for passwords. I have forgotten the Primary password on one of them. If I do a password reset on the one computer, does it affect the passwords stored on the Sync server, or maybe just the key4.db and logins.json folders on the computer being reset? I will not do a reset if the Sync'ed passwords could be affected, I'll just look them up on my phone. Thanks for your help!

I'm attempting to set up sync between my windows laptop and my new android phone. The phone has firefox loaded, allows me to pull up the 'sync and save your data' page, allows me to choose 'ready to scan' and presumably successfully scans the QR code displayed on the laptop (the laptop prompts me to approve the new device). Then the laptop indicates I need to wait to approve it on my phone, and the whole process stalls. The phone continues to display the mostly blank white screen with only the "moz://a" at the top and the spinning blue circle in the center. Eventually the whole thing seems to time out and I receive an error message on the laptop saying "websocket unexpectedly closed" and "device pairing failed".

My two hypotheses are that either still having my old phone (which is being retired to at-home use only, and I'd rather not de-sync) still synced is somehow interfering (seems unlikely), or that something about the new phone's software is interfering in the sync (seems unlikely and way out of my league in terms of troubleshooting around).

Help please?

Hi. I need help. I was work in company Zanzarra. I haved corporated email '[edited] @zanzarra.com'. Today i not work in Zanzarra, and access to account not found. [edited] @zanzarra.com - this primary email, [edited] @gmail.com - this second email.

Please change primary email to [edited] @gmail.com . I used account to brouser data (Bookmarks, history). Thanks.

Dear Support Team

I hope this message finds you well.

I am reaching out to report an issue I am currently facing. I recently changed my device, and upon attempting to sync my Mozilla Firefox account on the new device, I noticed that all my data—including bookmarks and saved passwords—appears to be missing.

Please note that my previous device is no longer in my possession and has been formatted, so I no longer have access to the original data.

I would greatly appreciate your assistance in recovering my data and saved logins, as many of them are not stored in any other browser.

Thank you in advance for your kind support. I look forward to your response.

Best regards,

Hello, i have run Firefox for years on 2 separate computers each with their own data and now I want to sync them. My problem is I don't understand to the 2 different sets of data if I sync. Do the 2 sets 'blend' somehow? Does one set take primacy over the other (if so, how do I control which one it is?) or do I lose everything from both computers and start again? I've been wanting to sync for 12 months but I am so scared of losing information that I keep avoiding doing anything. Thanks Chris

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

Sorry to have this same issue again, knowing full well it can happen after finding this some years ago (https://support.mozilla.org/en-US/questions/1319823), I tried to carefully connect two older PC devices back to firefox sync, however on one I managed to enable sync before disconnecting my profile (it seemed as if reconnecting sync temporarily was the only way to disconnect a profile from firefox's UI - I should have been more careful and removed the profile from the filesystem level): at which point I polluted the sync server.

I've noticed that `about:sync` has an option under bookmarks/engine actions 'wipe bookmarks', which sounds exactly what I need, and if I watch what happens once pressed it does the right thing and repopulates the sever with the 'correct' PC's bookmark set (when run from that PC), however it also says 'other devices will act like a reset', which i'm finding NOT to be the case: eventually one of my other device repollutes the server with bad bookmarks which propogate.

I'm thinking the culprits are my phones, If I wipe and do a sync on a phone, my phone's bookmarks stay polluted. If i'm right about that, I think my question is: can I wipe my profile (or preferably only my bookmarks) from my phones' Firefox without having to entirely uninstall/reinstall (or do you have any other advice for not re-polluting the server from some already-polluted device's bookmarks?

thanks in advance