Firefox Community Forum

I think that this recent update removed all of my tabs and tab windows, it has done this before and I don't understand why, I have the old update session file still (The 11/11/2025 One) and I tried to use that one to bring the tabs back by putting the file in the sessionstore-backup folder with no other file in it, but they didn't come back. I am genuinely confused as to why it doesn't work, I have renamed and deleted sessionstore.jsonzl4 files but it still comes up as a new session.

This is the message I get when I try to access my Bookmarks: "The bookmarks and history system will not be functional because one of Firefox's files is in use by another application. Some security software can cause this problem." I have already tried to find out from Microsoft if their latest reinstallation of Office Professional could have caused the problem. They say they have nothing to do with Firefox. How can I get my Bookmarks and History back?

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After trying suggested "fixes" still unable to get bookmarks restored on my Firefox account, and can't add any new ones either. Should I reinstall Firefox?

Everything changed with last update. just today was able to get bookmarks back. Some still not working correctly, tool bars and theme are not correct either. unable to restore or sync to old settings. Please any advise? Toni

if the browser ever crashes it likes to forget all my login cache forcing me to login over and over again. it also forgets my last session even though i have load my last session of tabs on startup. this POS keep loading no tabs from the last session.

Old Bookmarks had utube music selections for okctrlrs@sbcglobal.net. After Best buy merged Owner and P. R. Patterson, Owner bookmarks w/music selections was gone. They said Firefox might have them somewhere. It would be VERY helpful if you do have them.

Hi, there.

After performing the most recent Firefox update, I was greeted with the "create a new profile prompt", rather than having it open my old one. When going to "about:profiles", ALL FILES in the Root Directory of my old, default profile have the same date as the update, or after. Not a single file is older than that and all my history and bookmarks are gone. The option "Restore Previous Session" was not shown after the update.

PLEASE HELP!!

Thank you.

PS: This happened on a Macbook Pro. All other profiles are the same as they were before the update, having kept all history and bookmarks.

You forced a download of of the new FireFox and it wiped out everything - favorite, history, etc.. even though I have signed into my profile. I don't even have the option to import from my previous version. WTH?!

Hi - firefox recently updated and when it did I lost many of my recent bookmarks - also in the bookmarks backup folder dated when the update took p[lace there is not a backup there - folder is blank

i followed one of your posts and did the verify integrity check and here is results

> Task: checkIntegrity - Unable to fix corruption, places.sqlite will be replaced on next startup > Task: checkCoherence - The task queue was cleared by an error in another task. > Task: expire - The task queue was cleared by an error in another task. > Task: vacuum - The task queue was cleared by an error in another task. > Task: stats - The task queue was cleared by an error in another task. > Task: _refreshUI - The task queue was cleared by an error in another task.

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??

Does anyone know how to restore a previous profile? I had a situation like this: I had Firefox 140. I decided to upgrade to 147. Then I upgraded to 145 and all my data disappeared. The system is Linux Ubuntu.

I did not have an account, (i made it js now to ask the question) but every time i opened firefox everything was saved, my search history, pinned pages, PASSWORDS, (which are all gone and its the worst thing in this situation) accounts on multiple websites, and this type things, EVEN when there were some updates to the app. And the latest profile update, yes i was scared for a second that itll all be gone when i made the new profile but i saw theres another profile with all my things saved. But now, i open the app, and its like i just installed firefox. There are some business tings to set up, they asked me if i want to create a new account, some things i just skipped, then i look and its a whole fresh app. No passwords, no extensions i had, no theme i set up, no saved search history, NOTHING. Now is this normal, and my fault because i didnt have an account? Because im pretty sure that shouldnt happen and i really need all those things. But if its my fault then i get it, although im still a bit upset but if theres any way to recover, or prevent this from happening next time, please let me know.