Firefox Community Forum

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]

I recently downloaded and installed the update to Firefox browser. After installation I find that all my bookmarks (and I mean ALL) are gone. They are gone completely. First time that has happened with an update. Very frustrating!! I had a lot of bookmarks. Lots of music and specific web sites that I frequently use. Now they are gone. Totally disappeared What happened? Is there any chance for recovery. The installation instructions say that I will not lose any data, etc., etc. And I believed it.

I have spent the last two hours trying to get my Bookmarks amd history back. I am exhausted and very worried. Firsty I tried going through the Menu, but there is no list of backups there. and there is no history, either!

Then I tried looking in about:profiles - I only have three:

oi853qa9.default, 7sh8b0ii.default-release, and d41afk6n.default-release-1. Only the first one of these contains any bookmark files.

https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2025-07-30-04-40-08-1414cd.png

Ideally, I would like to restore the most recent of these, or the second most recent, if the newest one is corrupted in some way. However I cannot find a way to do that from the information I have seen tonight. I hope you will be able to help me out,

Yours Sincerely, Ms Jacq Felis.

I have been trying for days to get back my passwords and bookmarks. The support articles are not terribly helpful. All I want is to restore my bookmarks and passwords that Mozilla wiped out. I have the old Firefox folder but the support page says just copy what you need. please, is there a simple way to restore my bookmarks and passwords without having to jump through hoops.

Hello: I am trying my hardest to figure out how to move my existing Firefox profile folder (with bookmarks, passwords, etc.) to a new system. I have tried repeatedly to take the contents of the existing profile, and past them into the default profile on the new system. None of the information shows up.

The existing profile is version 115.25.0, running on a Windows 7 Pro platform.

The system I'm trying to move the profile to is a Windows 10 Pro 64 bit system. I installed the same version of Firefox on the target system.

All the files from the existing system seem to copy over to the new default profile folder fine, but no luck when Firefox is opened.

I also tried copying the entire profile folder over (leaving the folder name intact), and removing the default profile that was set up by Firefox. When I do that it just gives me a message saying it can't find the profile.

Don't know what else to do here. I have a lot of data in the old profile that I don't want to have to re-create.

-S

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.

Updated to 115.26.0esr and it lost my profile, so I recovered it using about:profiles. I have my bookmarks but the "restore previous session" is not highlighted, so I have lost 40 something windows with maybe 5 tabs each. It would take forever to go thru Bookmarks and re-open every one of them.

how do I recover "restore previous session" after updating version & recovering Profile ?

Probably lost the Profile when I changed the filename - I like to show the version in the filename. How can I change the filename without losing my Profile & losing "restore previous session" ?

hello I have the following questions

I used Firefox browser on my laptop for 4 years, but later updated my hard drive due to insufficient memory. But before, the account did not enable the password synchronization function, and it was found that the password saved in the browser on the old hard drive was not synchronized back.

At present, I can still log in to my old hard drive through websites and search methods. I have tried copying all the folders on my old hard drive to my new computer, but it is currently not working. At present, I have saved the key4 file and logins. json, which are the original system passwords, but I don't know how to import them into the new system.

So please advise on how to solve my problem.

thank

Had accessed and used computer (Windows 11) today and all of a sudden all bookmarks disappeared as well as bookmarks toolbar. In addition I cannot bookmark any site. This is the 2nd time this has happened since upgrade to 141.0. Did a "refresh" on the first occasion but probably lost all my extensions - (I had not recorded what I had). Have had to revert my searches to Chrome but would prefer Firefox - which I have been using "trouble-free" for 20 years. Very disappointing.

I accidentally uninstalled firefox on my phone. it was the only login i had for my account/profile and unfortunately could not find my recovery key or old password. I reset it (same device, with 2fa) however it said that it could not recover my data. no passwords, no bookmarks.

Is there any possible way to recover my password through mozilla I also have an ssd from a laptop with a login and iirc passwords. Could I use that? thank you.

Hello, I'm not sure which genius decided it would be a good idea to have the latest update (141.0) automatically change the Firefox settings to 'clear history when Firefox closes' but that is what happened on both my computers... I obviously didn't notice just lost years of research history as well as all my tab groups. No information in session history at all (before today). Nothing at all in session restore. Is there ANYTHING that can be done to restore my history? Genuine suggestions appreciated.

Just updated from version 140.0.4 to version 141.0 and all my bookmarks AND browsing history are gone! I do see the appropriate files in my Firefox profile folder.

I tried following the instructions in the "Fix "The bookmarks and history system will not be functional" error message" article (https://support.mozilla.org/en-US/kb/fix-bookmarks-and-history-will-not-be-functional?as=u&utm_source=inproduct&redirectslug=The+bookmarks+and+history+system+will+not+be+functional&redirectlocale=en-US), but they are not correct, i.e., Solution 3: Update Security Software definitions does not apply as I have Defender turned off in favor of using ZoneAlarm. And those instructions say to update the definition, but there's not place to update the definitions.

I tried to import bookmarks from the Bookmarks folder, but when I click on "Choose file", Firefox either does nothing or shuts down without displaying any error.

100% disappointed with this update!

Greetings Ya'll,

Firefox Bookmarks are no longer being initially placed in "Other Bookmarks, they are now being placed in the "Bookmarks" that is under the "Open Application Menu" Tab.

I've found that the "New Bookmarks" can be "Dragged" as a copy to "Bookmarks", from the "Bookmarks" located in the menu, for they will stay there unless I delete them

I can not move the "Bookmarks" back to "Other Bookmarks"

Would I lose My Bookmarks, If I "Refresh" Firefox, as suggested in the "Troubleshooting Section? If there is a chance of this happening then that would Absolutely Be Catastrophic!!

"Give Firefox a tune up

The Refresh Firefox feature can fix many issues by restoring Firefox to its default state while saving your essential information. Consider using it before going through a lengthy troubleshooting process."

I am on revision 141.0 (64-bit). I believe it automatically updated on 7/20/25 or 7/21/25) PDT. All of my history is gone! There are some bookmarks missing too but those aren't important compared to losing my history.

I only have one profile.

Can someone help?

Thanks.

I just lost all of my bookmarks and am unable to add new bookmarks. I am not aware that I made any changes, nor was anyone else using this computer, they simply disappeared. When I log into a familiar site and hit add bookmark, nothing happens. Also, if I go to manage bookmarks and attempt to manually add the book mark it doesn't work. Any suggestions? I prefer to use Firefox as my browser, but will have to switch if I can't resolve this!

I was working away on copying some files, nothing to do with Firefox. Firefox was open, though I hadn't used it in several minutes. Upon returning to Firefox, I noticed that although my browser had been open, it was not open anymore. All that was open was the download window.

At times in the past, I've accidentally closed the browser window while the download window was still open. I thought maybe this was what had happened this time, even though I absolutely didn't do that. I closed the download window and clicked on the icon on my desktop to restart it.

And that was when I discovered...no more tabs. Not a single one. Just a plain single blank tab.

In searching for an answer, I found this page: https://support.mozilla.org/en-US/questions/1396868 but in my confusion and horror and anxiety over needing to get the tabs restored, I had missed this part: "Assuming you found the .html file, it should indicate which .jsonlz4 file it was listing out. Is that the file you want to roll back to (the .jsonlz4 file, not the HTML file)?" and I had started to follow the procedure below it, and after renaming the two files as specified, I realized...I don't have a file to restore.

And so now I have nothing. I don't know how to restore my tabs at all. I literally have no access to anything, because all was tied up in those tabs. How do I restore them? I did find another procedure elsewhere that used "History" and "Restore previous session," but the problem with that solution is that in the "History" there's no such option at all. (This is where I found that one.) https://www.bleepingworld.com/restore-previous-session-firefox/

I'm so afraid to try anything now, I haven't had this problem in years and now I'm totally lost and afraid to mess this up more.

As for the browser I'm writing about, it's the latest Firefox, as I have it set to automatically update. OS is w10.

Also, I only have sync set for passwords. I don't have it set for tabs, for the reason that I use different ones on different devices.

Please, please, help!

Thanks in advance.