Firefox Community Forum

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.

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

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!!!!

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?

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?

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?

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

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!

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 power cycled my computer in order to install some Windows updates, and when I opened up Firefox again, I had precisely zero bookmarks.

I found this folder, which is supposed to contain my automatic backups: https://i.postimg.cc/bwrWBswd/A.png

But I can't figure out how to use those files to restore my bookmarks.

When I click on Manage Bookmarks > Import and Backup > Restore > Choose File, nothing happens. No other option seems viable.

I had an ASSLOAD of bookmarks on this browser, so I need to recover them because there's just no way I'll be able to remember them all manually and add them all back one at a time!

What do I do?

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

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.

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 restarted Firefox and noticed my toolbar book marks were missing. In further inspection, I noticed all my bookmarks over many years are missing. This is obviously a disaster. What happened? Is there way to recover this information?

Some of my shortcuts were missing on Firefox when I started my laptop this morning. I tried restarting my computer but that didn't help. I really don't know what topic fits best. I am not at all tech savvy when it come to computers.

not all windows appear in the drop down "window" menu, and a different number when each window is on top. Weird.

Using Mac OSX. Nothing is "full screen." Seems to be nothing to do with if a window is minimized or not.

I have restarted. Recently updated, and lost profile, but recovered it, but lost all my open windows & tabs, so now I have only 5 windows open. Seems to be nothing to do with if a window is minimized (OSX) or not. Needs a better mechanism to save open windows & tabs along with profile data.

I accidentally refreshed Firefox when I was having problems and didn't realize Refresh meant wiping everything clean. I found another thread about this, but it's 8 years old and things have changed. How do I use the "Old Firefox" folder on my desktop to restore all my bookmarks, history, etc.?

Today my Firefox browser updated & all my bookmarks have disappeared. In place of my Bookmark toolbar is just "For quick access, placeyour bookmarks here on the bookmarks toolbar. Manage bookmarks(link). The bookmarks side bar is empty. I've followed the instructions to try to recover them but the page(Goes there from the "Manage Bookmarks" link) they send me to has no functionality. Whatever I enter goes nowhere, whatever I select. I've tried several different routes from the support/help pages to resolve but always end up at this dumb page. See here(https://www.dropbox.com/scl/fi/fop0kf0qb2nu442pqc6jz/Screenshot-2025-05-14-17.13.28.png?rlkey=3x1pchkfxq12whipytzzkte2x&dl=0)

How do I get my bookmarks back when the tools to do so don't seem to want to work?