Firefox Community Forum

Is there away i can get my browser history and data back ,i logged out of windows couldnt remember my password ,logged in with a new password and all my data is gone .....

firefox updated to 128 esr all of a sudden (i didn't click update or download for this) and when i went to open firefox, the appearance and everything changed. it looked like google chrome and none of my bookmarks and settings and layouts were there. they just DISAPPEARED. i tried googling how to to fix this and for some reason every time i search it takes me to another search engine instead of google. (this is beside the main point though). I'm so frustrated right now since all my bookmarks are gone (literally having a breakdown). I tried looking through the help articles and all of them just say to use the backup profiles or that there are bookmarkbackup files in my profile folders or that firefox would download a folder with files from the old version but none of that happened. I looked into my folders for older profiles trying to find places.sqlite files but NOTHING. there is literally NO backups or profiles dated to before July 16 2025; the day it updated (shown in screenshot) and there is NO bookmarkbackup files anywhere. i have signed in to firefox prior and had my devices synced for awhile and no issues so there should have been previous profiles and data saved onto my computer. Please help, I really need my bookmarks back!

I upgraded to Firefox 143.0.4 and lost all of my Bookmarks. How do I find and reload my Default Profile? Also, I cannot load anything in Firefox I am forced to use Edge which I do not like at all!!!!

I quit Firefox and when I restarted it it said it was a new version! It said something about restoring but I assumed it was just restoring my prior pages! DAMN! I can't even find a place to import bookmarks!

I am so angry I could chew nails!

iMac 2013 Catalina 10.16.7

Synced my new computer, received bookmark toolbar and 10 year old bookmarks from when i switched from interent explorer, but all my more recent bookmarks and bookmark folders are still missing on the new computer. Also didn't seem to transfer passwords and autofill info.

When I opened Firefox, all my profile settings were back to a Default. Lost all my settings. Looked up solution on Google, couldn't find an "Old Firefox Data Folder" anywhere.

Tried the other listed "profiles" in my profiles folder, none were my most recent profile with all my settings from the past months.

How can I find the profile that was used before my update which was done 7/27/25 ish.

Thanks, Jean [email removed]

у меня стояла функция открытия вкладок из предыдущих сессий, но сегодня я открыл firefox сначало все вкладки были подписаны типа autoblock(или как-то так), я решил перезапустить браузер, в итоге открываю и ВСЕ вкладки исчезли, а у меня их там очень много и я точно не все вспомню, попробовал восстановить через журнал("восстановить резервную копию от" я выбрал от 21.10.2025, но она просто выдало сообщения, что текущие вкладки заменятся, на те, что в резервной копии и больше ничего не произошло) есть ли способ восстановить все вкладки не прибегая к тому, чтобы листать историю вручную?

Hello,

Several passwords were saved by Firefox. They are only saved locally ( no sync with Mozilla account). I recently upgraded my laptop from Windows 10 to Windows 11. Since the upgrade, no password is available in "Saved Password" section. I checked my profile and I can find logins.json file ( with all encypted logins and passwords) and key4.db file. I suppose my passwords cannot be decrypted as they were encrypted with Windows 10.

Is there a way to recover my passwords?

I've been backing up my opened tabs for the past 4 or 5 years with the steps in this legendary post: https://support.mozilla.org/en-US/questions/1257866

But this time it failed me and I don't know why. I just switched from Debian to Linux Mint, put everything up to date, but when I copy the sessions-store folder back into my session folder, as described in the post, nothing happens. I tried restoring only the 2 files listed there, and also dropping them in the general user folder, outside sessions-store, but still nothing. I've also noticed that the sessions-store folder isn't created automatically, even if I open a bunch of new tabs now and close the browser.

I don't even know how to begin troubleshooting this to be honest, this is the first time this method's ever failed me :(

I also saw this post: https://support.mozilla.org/en-US/kb/how-restore-browsing-session-backup But it doesn't help either.

I need to recover a `.jsonlz4` file to restore a Firefox session with 8 active instances, as the "Restore Session" feature only opened 5 due to the `browser.sessionstore.max_windows_undo` setting being capped at 5, and the full original `.jsonlz4` file is now missing.

In the`firefox/Crash Reports` directory, there are numerous files I can’t interpret, can I retrieve my session data via telemetry or other methods using this crash information. I’m using Linux Mint with Flatpak Firefox, and I also have crash logs containing a "last crash" text file and a string of numbers, could these be useful for getting back my session?

My passwords are apparently lost today after updating Firefox.

What went wrong? How could that happen? Why, Why Why?

Anyway to get them back? Are they hidden somewhere?

Anyone else suffering from this update too?

Any help or insights as to why would be greatly appreciated.

w

So Firefox just wiped my cookies, my tabs, including my tab groups, and my settings in both about:preferences and about:config after an update. My history, passwords, and extensions are still intact, so it was not a true refresh. I can deal with the settings and cookies again, but my tab groups are nigh-unrecoverable. "Recently closed window" is greyed out, so that did not help either.

In the "Add Tab to Group -> Closed Groups", my old tab groups are still listed, but as far as I am aware there isn't support to access them yet.

I checked the root profile folder and, following the instructions from this thread, managed to fetch my tab groups from previous.jsonlz4 and recovery.jsonlz4.However, I could not for the life of me get mozlz4 to launch.

Additionally, I have an older backup of the same profile from 2 weeks earlier. This backup also confirms there was some unspecified data wipe, since it is 2GB more than the current profile folder.

With the available recovery data at hand, I have a couple of outcomes that I can live with.

1. I can indiscriminately replace my current profile with the old backup and hope that when I restart Firefox will correct itself to match the current version.
2. Someone could help/instruct me on which files to pinpoint to recover my site data/cookies/tab groups discriminately from all the files in the backup, so I don't have to fully replace the current profile.
3. Someone could help me troubleshoot the guide outlined in the link above to figure out why mozlz4 is not working.

This has been driving me nuts over the past 24 hours and I honestly do feel like I'm a bit out of my depths. Any help is appreciated.

Siguiendo sus instrucciones facilitadas, he conseguido recuperar la carpeta de mi perfil anterior pero no se qué hacer con ella para que aparezcan los marcadores de siempre en la aplicación, cómo lograrlo Gracias

Today I opened Mozilla at my laptop. It malfunctioned (videos froze, pages did not fully download), so I closed the window and after a couple of seconds I reopened it. My previous session was gone. I read your articles regarding this issue, did what was described there, but nothing has changes. I lost everything! Job videos, hobby pages - everything! A couple of pages can be restored via history, but that's it! I didn't do anything special before closing the window!

Getting ready to replace my computer. Is there a way to take my Firefox bookmarks and passwords along with me. I know there are 2 profiles in different directories.

c:\users\jer\appdata\roaming\mozilla\firefox\profiles AND c:\users\jer\appdata\local\mozilla\firefox\profiles

Don't really know difference between roaming and local, except roaming is a lot bigger.

I doubt I could copy the whole profiles as they would contain information that is about current computer and wouldn't work on new computer. However, it seems that I have read or seen there are files within these profiles that just contain my bookmarks and passwords and they can be moved to another profile.

I just need to know the name of the files that hold his information.

Any help would be appreciated.

I don't what or how it happened.

But one night all I can remember was I updated my Firefox in Windows and my account was synced. I use to have all my browser history on my Macbook air. But suddenly the next day I discover that all of my history is gone. I have no idea what caused or how I can recover it again. I tried the internet and nothing helped me with my problem. So now I'm resorting to this and hopefully someone can tell me what to do.

David