Firefox Community Forum

I had ~500 saved logins on Firefox prior to it updating to version 121.0 - now I have 15.

Firefox Lockwise app on iPhone still shows all my saved passwords.

How do I get these back and why have you deleted them?

I was having some hard drive trouble so I formatted my pc. I did not think much of the browser favorites and tabs because they should have been synced.

This time, however, I seem to be unable to retrieve the data from my old computer, there is even a computer in my synced items (I'm hoping from the system before restoring, windows 11 on what used to be windows 10) but am unable to get anything from it, or see the history ect

For the past two months, I've been trying to sync Firefox (114.1.1) on my Samsung Galaxy phone (SM-N950U) with Firefox browser (114.0.1) on my Windows 11 Home laptop. On the phone, it works fine. On the browser, when I go to firefox.com/pair ... I get to the screen with the bar code, when I scan that bar code on my phone, the windows Firefox browser gives me an Error 500 (see attached.) Your help is appreciated!

Using OSX 12.7.5 on two laptops and a Mac Pro. Selling one of the laptops. Removed personal data for Firefox by 'trashing' the Firefox folder in Libaray/Application support. Then disscovered that the 'Privacy/Security' folder in both the laptop and Mac Pro were now empty. Nothing else affected. Went into TimeMachine and restored the entire Firefox folder from a recent backup. Privacy/Security folder not restored. Anyone have any ideas?

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.

This all started when i wanted to use a user.js file for firefox.

I followed a youtube video to create a new profile to use the user script but I wanted to change the directory so I deleted it, made it anew and somehow the default profile file that i used was gone (I realised this only later). I think I had somehow overwritten it, but its weird because in my trashbin i did not find anything.

When asking me to login to sync I gave my password but it said it was wrong i realised I was using a vpn so i turned it off and then it worked, however then it asked me for a confirmation code from my email wich I also gave but it still refused saying it was wrong, which it wasn't!

After that I gave up and made a backup of my profiles and resetted my password still thinking I had my old profile file. My logins were gone and copying and pasting the login.json with the key4.db files from other profiles didnt give them back.

Luckily am still logged into my mobile app where i have my logins but there is now a warning sign to reconnect to resume syncronizing and Im afraid if i reconnect its going to delete my saved logins on the app instead of using them.

What do i do now? Is there a way to export all my data from the mobile app? Do I need to copy my logins one for one? Or can everything be resolved by reconnecting?

According to this support page (https://support.mozilla.org/en-US/kb/sync-custom-preferences#), setting ``services.sync.prefs.dangerously_allow_arbitrary`` to True will sync all my preferences.

I have set it to true on the two devices I want to sync (2 desktops, Windows and Ubuntu). However, the preferences are not synced. For example, ``browser.compactmode.show`` keeps its default value "False" on my Ubuntu installation, despite it having the modified value "True" on my Windows installation.

I have tried pressing "Sync now", and restarting the browsers - to no avail.

Could anyone tell me what am I doing wrong?

Firefox has always maintained that current tabs will be restored after a reboot of the browser, and indeed that was the case for the first half-dozen years I've been a subscriber. That has not been the case for the past 4 - 6 months however. I have the correct Settings for this, so it is not on my end. Why do I always get a fresh Firefox browser whenever I update the version (which is quite regular lately . . . maybe a new version of Firefox every 3 weeks). Please help.

Hi,

This has been brought up before, but not with this exact question (not that I could find, at least).

I understand that cookies cannot be synced across devices, but this is not what I am asking for. Is there a way to make firefox sync the list of exceptions? Meaning, only the specified website URL and its status, not the cookies from these sites.

I am using Firefox Developer Edition in a work environment that only saves directories between weekly restarts by explicitly managed rules. As a result of some missing folders from my weekly restarts, I need to sign in to my Firefox account and enable sync each week. Currently my machine retains the %APPDATA%/Mozilla and %LOCALAPPDATA%/Mozilla directories + children.

What other directories are needed by Firefox Developer Edition in Windows to retain the user profile/syncing, et. al.?

Thank you for your time!

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

Both my computer and my tablet are logged into my Firefox account, the page at accounts.firefox.com lists both devices, yet for some reason they won't sync. I've synced two mobile devices before, and it worked fine. I've spent a good portion of today trying to figure it out, and have gone half mad from frustration. Please can you help me? Thank you!

I work at a small company I had to do a windows recover on a users laptop. He logged back in to firefox which had all of his passwords saved and now none of them are populating is there anyway to get them back? They are vital to his job.

Hi. I am a graphic designer and Web master. I use your browser since I think it's the best. I did a format of my pc and I forgot the password of my account. So I did forgot password. Thinking all my password would of sync and follow me. But it didn't. I had over 1000 password from site that I have recently work on and some still working on it. Which were most of them auto generate. Which I wouldn't have a clue of any of them. PLEASE Is there a way for me to regret my passwords? Only the password. Please thanks!

I changed my firefox account password and lost all of my saved logins and bookmarks is there any way to restore it please help its very imp coz i dont have backup.

My company just pushed out new group policies for Firefox that blocks use of Firefox Sync. That also, apparently, blocked use of my saved logins and passwords.

I can find the encrypted password files in my profile: key4.db logins.json

but I can't open them.

Is there any way to get my login and password information?

MJA

Hi Support,

I have always been struggling with the idea of syncing two devices, that is main and secondary devices, and that when logged out of the secondary device, user details such as passwords, booksmarks and other important things are left bare on that browser or secondary device.

It is my believe that, after completing whatever task that led users to sync both devices, the moment the user logs out on the secondary computer, or any of the computers, the passwords, bookmarks, history and other essential details should not display again on such computer or browser anymore but apparently thats not the case with Mozilla Firefox browser.

Kindly look into that and work on it....THE SECURITY AND SAFETY OF THE USER IS LEFT WIDE OPEN!!!

I have to computer with totally different tabs. Will Firefox sync combine the two sets of tabs? I realize that I may have duplicates and a LOT of tabs. I just don't want to lose any tabs or bookmarks when the computers sync afterward. I am currently assuming that the tabs sets will be merged and that I will have to remove duplicates.