Firefox Community Forum

Mozillers,

I depend heavily in my environmental and other work on Firefox and am grateful for its ability to restore previous tabs when my laptop, not infrequently, stops working abruptly.

Now the much-used bookmarks have disappeared. A search site states promisingly:

"To restore Firefox bookmarks, use the built-in backup feature by going to Menu > Bookmarks > Manage Bookmarks > Import & Backup > Restore, then select a dated backup or a manual file (like a JSON backup) to bring back lost bookmarks..."

But my Firefox's Bookmarks drop-down menu has no Manage Bookmarks option. PLEASE, what must I do?

Elsewhere I managed to find this file which apparently contains recent bookmarks:

"C:\Users\User\AppData\Roaming\Mozilla\Firefox\Profiles\unk14jlv.default-release-1647366062305\bookmarkbackups\bookmarks-2025-12-26_95_4IdGtYxezJpwuH1UIiT1bRwe1K6bcGO8rv0mqa9rUWU=.jsonlz4"

But attempting to open it with Applications\firefox.exe (default) accomplishes nothing.

FOOL-proof instructions would be wonderful. Thank you.

with this new version i lost everything i need to get back to an older version and get all my extentions my bookmarks back all my s desktop items that i had linked to firefox are gone i can no longer get face book or anything back to firefox book marks every thing i had with firefox

and

Aloha — An update to Firefox must have occurred, and I am unable to access my open tabs and bookmarks. I have had a Firefox account for 15 years at least and a lot of information was in my folders and bookmarks. Please let me know how the information can be recovered. I tried to follow several of the instructions provided and was not able to fix the issue. I have a recovery code/Mozilla key, but I am not sure where or how to use it.

I do all my work and personal stuff on Firefox so I need timely assistance to fix the problem.

Thank you, Mike

I have purchased a new computer and I want ot transfer al my bookmarks, login details etc onto the new one. I have followed the instructions given on your help pages, to no effect. My old computer ruins Firefox under Win 10. The new computer runs the same version under Win 11. I have copied the contents of Profiles from the old to the new, but Firefox says the profile is missing. When I copy and add the folders in Profiles to the Win 11 computer, there is no difference. The names of the folders in Profiles are different on each computer, so I think that it is looking for a particular file/folder name, but I don't know which one. Can anyone help me?

Hello -

My bookmarks (400+) that I have accumulated over several years were all gone when I signed into my computer recently. I tried to restore them, but I was unable to get them back from all of the 15 backup points. I kept getting an "unable to process backup folder" error message. I only have one Firefox profile that I am currently signed into.

I use CC cleaner to clean my computer weekly and sometimes use the custom clean feature to clean up cookies and browsing history, but by default the clean bookmark backups box is unchecked and I have never had a problem using it before. I suppose it's possible that I may have checked that box, but I don't know if that would have also wiped the bookmarks off my browser. I am also checking with CC tech support to see if they have any answers. Suppose I may be out of luck if so.

I also sometimes go into FF settings and clear browsing history and cookies, but I don't think there's even an option to wipe out all bookmarks. I have also been doing that for years, and have never had an issue before. Does anyone know if there's a way to re-download my bookmarks from the cloud, or do I have to start all over again?

Any tips would be appreciated, thanks.

I was, admittedly, perhaps doing a bit much on my ram at the time. but i didn't expect this. i didn't expect it at all.

screen went black a moment, firefox crashed. I figured it was fine! it crashes sometimes. it always restores my tab. the little bug report was there! willing and ready to restore my session for me. i let it restart fox.

i get the firefox sesion restore tab. but i already am filled with dread and upset. because i can see, in my peripherals, the blue button to restore session, is already greyed out. checking the little drop-down that shows you your session- [expletive]. empty.

God. what the [expletive]. I- what the [expletive]. it's a stupid thing to cry over, im sure. But some, most, of those tabs were YEARS old, from when i moved. and i've been having a hard time thinking about my old home lately. and now i've lost another bit of home. Some of those tabs may not even be in my [expletive] history anymore; i have a weird cut off of my oldest history in the history window, library window, thingy, where i can tell history was wiped, but i never wipe my history. i have no clue why this wipe even happened! Other then pushing it on my pc a bit much, but it's not been the first time i haven't paid attention; and it's restored before! what the [expletive]. Deeply upsetting. i've tried, even, to restore things myself; i have a 'upgrade.jsonlz4' file, few months old, but enough to have most of my tabs if it were stored inside; tried to rename it one of the recovery files, 'recovery.jsonlz4' and 'recovery.baklz4', then both, but doesn't work to get my windows back. This is awful.

Mozzila не открывает предыдущую сессию, соответствующая галочка в настройках стоит. Я пробовал разные способы, указанные в часто задаваемых вопросах. В том числе с подменой данных в папке sessionstore-backups: запускал браузер - находил эту папку - вставлял нужный файл .jsonlz4 - перезапускал браузер. В таком случае все мои вкладке были на месте НО после закрытия-открытия браузера сессия снова сбрасывается. При очистке браузера, появлялась кнопка "восстановить предыдущие вкладки", восстановление происходило, НО закрыл-открыл браузер - и снова пусто. Пробовал удалить браузер и установить снова - та же проблема. После запуска, если открыть журнал - в разделе недавно закрытые вкладки, недавняя история поиска - пусто, как будто предыдущей сессии вообще не было. Как исправить эту проблему? Примечание - мои закладки, введённые пароли и расширения на месте.

All my Firefox bookmarks are GONE. I followed the directions for restoration, and the Restore (etc) window has nothing in it. I saved the bookmarks to a JSON (HTML) file on an external hard drive, but I cannot find a way to restore them. I'm just about tired of Firefox and the consistent problems. Please restore my faith. Thank you.

I was browsing web pages and wanted to bring up a previously visited page, but when I went to my browser history, there was absolutely nothing. I had at least half a year's worth of history and now it's gone. How can I get that history back? For reference, I am using the latest update on a Win10 OS. I want to get this back, because there's a lot of pages I'd like to revisit but now cannot.

Good afternoon

Copied Firefox profile in W10

Pasting into Profiles folder in W11 but it won't let me do it. See attached.

I have enabled LongPaths in the registry but that hasn't solved the problem.

Please advise Michael

I logged in a few minutes ago and all my bookmarks are gone. It says my bookmarks are empty. I've used Firefox for years and never had this happen. How can this be fixed?

Absolutely furious. My bookmarks have completely disappeared and none of your suggested 'articles' is any help at all. I certainly won't be using Mozilla any more if you can't tell me how to rectify this.

Something or somebody emptied my bookmarks. I tried the import/restore routine but was told that Firefox "was unable to process the backup file." I also tried System Restore without success. Can you help me? I don't want to leave Firefox, but the problem reoccurs, which is maddening and time-wasting. Thanks, Bruce Berckman