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The electricity here went out briefly. My I-Mac shut down. When the electricity came back on, the bookmarks were gone. And also, now I cannot bookmark anything-cannot initiate a new bookmark

bold textFirefox does not allow porting of bookmarks from one profile to another!!!!@!!!!!!!!! I can copy bookmarks to an external drive, but then how am I supposed to get them into another profile when the folder is the same as the one I copied--there is only one folder under library/application support etc. so doing it manually doesn't work; new profile gets error message, as account only allowed on 1 profile so Sync doesn't work.

Ok, I screwed up.

I was trying to solve a problem I've been having with regular releases of Firefox and it occurred to me try the ESR release so I downloaded and installed it. The good news is that it solved my problem, the bad news is that I just barrelled into it without thinking, assuming that my logins and bookmarks would just transfer over like with regular releases. They did not. It turns out I should have made a backup of those things first and I can't open the old regular release of Firefox to properly back-up those things now. Oops.

I've been reading lots of forum posts here and elsewhere trying to get those files into ESR and I haven't been successful. From the profile manager I've located the profile that still contains that info and I've tried:

Copying and pasting the "logins.json" and "key4.db" files from the "default-release" profile into the ESR profile which didn't work.

From "about:profiles" I also tried to "launch profile in a new browser" of the default-release profile so I can open that profile and properly back-up bookmarks and logins but I get a prompt to create a new profile which I tried several times and only resulted in several profiles of the ESR release.

Then it occurred to me that If I could just delete all instances of ESR and open the old default-profile then I could back-up the logins and bookmarks, THEN download and install ESR again and import those files but before diving into that I need to make sure that won't loose my original default-release profile info.

So experts, does that sound reasonable? Delete all instances of ESR so I can open the regular Firefox? What's the best way of going about that?

Thank you.

When I opened my Firefox browser this morning, all of my bookmarks were gone, the ones in the bookmark menu and the ones on the toolbar. I am unable to get any bookmark to save.

Hi,

i can see all my previous tabs in history but can't reopen window?

I didn't close those tabs, one time i opened mozilla and they were all closed.

Help me, thank you

bold text'I am so fed up with these updates loosing my passwords and data, why ? All my settings are messed up and last time it took two weeks to get everything back, why? I give up total idiots for releasing updates that are sub par!

""What happened:"" Yesterday I updated Firefox to 151 and noticed a "Profile" feature for the first time. I created a new profile, then saw a small icon with the Firefox icon that bothered me and realized it belonged to the new profile. I thought that the newly created profile is safe to delete and has to data within, so I deleted it. After that, Firefox deleted all old data and created another new profile and I lost old bookmarks, passwords, and browsing history.

Note: no warning was showed before deleting the profile.

What I tried: 1. Checked about:profiles profiles: no old data. 2. Opened the profiles folder in C:\Users\[my account]\AppData\Roaming\Mozilla\Firefox\Profiles: no old data found. I noticed one of the default profiles contains a places.sqlite file that’s about 2 years old: no old data, only default bookmarks are there. 3. Used Recuva to try to recover files — I recovered key4.db, login.db, and places.sqlite-shm but nothing useful so far. Environment/details: • Firefox version: 151 • OS: Windows 11 • No Firefox account Questions: • Is there any way to restore the old profile data from the files I recovered (key4.db, logins.json/login.db, places.sqlite-shm)? • Any other recovery steps I should try? • how to prevent the same thing in the future? Thanks

All but 2 of my previous saved windows have been lost. They are not recoverable or present when trying to use "Recently closed windows." How could this happen? More importantly, how can I recover them? They contain numerous tabs that will be impossible to recreate from memory.

Dear Mozilla // Firefox persons - you really know how to shoot yourself in the foot.... I am fed up having lost all bookmarks and not able to initiate anew despite intolerable checks for updates, restarts & reinstalls. Really pissed me off. Your "help" pages are grossly overpopulated with waffle and dead end links.

I got logged out of my Firefox account and upon logging in a bunch of dummy "sync" data replaced all of my bookmarks, settings, ect. Is there any way to undo this?

Hello,

I hope you're doing well. Unfortunately, my Firefox account was still signed in on my old mobile phone, which is now being used by my father. He accidentally deleted all of my bookmarks, and I have completely lost access to them. To make matters worse, I do not have any offline backup of my bookmarks.

I was wondering if there is any way for your team to restore the bookmarks associated with my account to a state from before December 31.

Thank you very much for your time and assistance.

How can I Recover Deleted Firefox (build 151.0.2 (64-bit) Browsing History in my version/edition of Windows 11 Pro, Version = 25H2, installed = 12/06/2024, OS Build = 26200.8524. Can you help me recover my Browsing History from Friday, 05/29/2026? Please.