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Firefox did an automatic update today. But now all of my saved bookmarks, saved passwords and items are gone in the new version. How can I retrieve them or return to my previous version of firefox?

I have enabled the option to open the previous windows and tabs. I had one window that I always closed last as it had a lot of groups that are important for my work, so it used to open every time I started Firefox. Sometimes, even if I closed the window by mistake without closing other windows, I was able to get it back by pressing ctrl+shift+n.

But yesterday, I might have closed it by mistake and when I pressed ctrl+shift+n , it didn't come back. I wasn't able to access my window and now it's all gone. I don't see anything in recently closed windows in history.

I need those tabs back as they are very important for my work. they were a lot of tabs. I had many groups but now all are gone. I tried by using the previous.jsonlz4 in the sessionstore-backup by renaming it in the default-release profile as sesstionstore.jsonlz4 but still wasn't able to access my window.

I didn't clear my history as the tabs opened in the window still show up in the history.

Kindly help as soon as possible

Firefox updated and all of my tabs I had open are gone. I used those for organizing and remembering things. There's no option to open recently closed windows. No history of the tabs as a group. What do I do?

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.

Greetings and Good evening Windows was reset on 03/06/2026 due to problem. Option chosen was removal of Apps only No data was removed When Mozila was opened on 03/06/2026,It had all data since 2021. It was already registered with -removed-@gmail.com. Still history and bookmarks from 2021 were not restored. On 02/06/2026,0ne drive back up was also initiated. Please guide me as how to restore this.

Thank you Regards Himanshu Kotecha

email removed by Isaac H

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.?

I had a lot of tabs open in Firefox, and they always stayed there even after restarting my PC. But suddenly, all of my tabs disappeared, and I can’t recover them using “Recently Closed Tabs.” Can I get them back?

I asked a question about a week ago. I can't even see the question anymore. While this was going on I received these emails. All times are in Australian CST.

Thu 2025-07-31 11:04 PM Your Mozilla Support request has been updated 305857

then I got tha same message again

Thu 2025-07-31 11:04 PM Your Mozilla Support request has been updated 305857

the next day I couldn't get in so I had to reset my password

Fri 2025-08-01 11:18 AM Forgot your password? Fri 2025-08-01 11:25 AM Your password has been reset

Then this appeared about 50 minutes later

Fri 2025-08-01 12:14 PM Forgot your password?

I found out about Mozilla Monitor and thought it might help

Fri 2025-08-01 12:14 PM New sign-in to Mozilla Monitor

Fri 2025-08-01 12:21 PM Mozilla Monitor found no known breaches

Then I got:

Fri 2025-08-01 12:30 PM Approve sign-in to Mozilla / Did you sign in to Mozilla?

again

Fri 2025-08-01 12:31 PM Approve sign-in to Mozilla / Did you sign in to Mozilla?

and again

Fri 2025-08-01 12:31 PM Approve sign-in to Mozilla / Did you sign in to Mozilla?

and again

Fri 2025-08-01 12:33 PM Approve sign-in to Mozilla / Did you sign in to Mozilla?

Then I got

Fri 2025-08-01 11:32 PM Mozilla Support Request: Share your feedback with us

which contained a copy of my post [I have made a bit of a hash up with my mozilla related logins]

Thu Jul 31, 2025, 07:34 but was appartntly sent by "Anonymous User"

this email wanted to know if I was satisfied - how could I be, when the problem wasn't solved?

next I asked another question {Which I can't see in my Emails} which netted me this reply,

Sun 2025-08-03 08:52 AM Mozilla Support Forum<no-reply@support.mozilla.org>

next I was back to this again

Mon 2025-08-04 03:59 PM Approve sign-in to Mozilla / Did you sign in to Mozilla?

and again just this morning!

Thu 2025-08-07 10:08 PM Approve sign-in to Mozilla / Did you sign in to Mozilla?

I am as much a believer in security as the next person but I don't understand what is going on,

I have had no response to my original ticket, which I beleive was number 305857 which I can no longer find any refernce to in my account, and I still have a completely blank Library! and I can't even make any new bookmarks!

Plaes help, Yours sincerely, Ms Jacq Felis (AKA Kaelkitty).

I updated Firefox to 145.0 this morning, and after Firefox had restarted, it had lost all bookmarks and the bookmarks toolbar. I have spent all day following links to correct the problem and got nowhere. I have restarted Windows and Firefox countless times - no change. I've even tried reinstalling Firefox over the existing version. If I go to bookmarks > manage bookmarks > restore and backup, sometimes that will load, others not. When it does load, it fails to find a file to restore from. 10 years of bookmarks, links & research vanished.

Can someone please provide a solution (preferably in Layman's terms) to this??