Firefox Community Forum

Hi Team , I am using my firefox browser profile logged in with "[edited from public] @tothenew.com" . Today when i open browser and got to know my account has been logged out while trying to sign in again to my profile it required to get authentication code sent on mail id but i had lost that mail id . so could you please help me to gain acces to that profile i have bookmark some important document on this .

Firefox updated and all bookmarks and history has disappeared. Is there a way to get them back?

Thanks, Scott

Moderator note: This question has been edited to correct the formatting.

Firefox crashed with many open tabs. I went to History > Recently closed tabs > Reopen all tabs, clicked. Nothing. The list showing only very few of the tabs I had open, but none of them are restoring anyway.

I just went through this a few days ago but once again find the message ""The bookmarks and history system will not be functional...." I have recently downloaded and used CCleaner7 and wonder if that app is causing the problem. Help, please!

Hello,

To explain the issue at hand I will copy the email I sent on Sunday to the Mozilla support team, by a member of which I was subsequently redirected here.

I am looking for a solution to a serious issue that occurred on my Mozilla Firefox browser on Thursday this week. It concerns a website called blankslate.io, which I use very frequently for taking various notes. On this site, it is possible to create a permanent account for storing one's notes, which I did not do because I thought it would not be necessary (though after this incident my mind on that has been changed). Without a permanent account, the notes taken there are saved locally only on the specific browser in the specific device. Onto the issue itself. My PC had been running critically low on memory, and, because of some misleading information I had received, I thought it was not possible to free more than only a very small amount. On Thursday, while I was playing a game, the remaining amount ran out (which surprised me because there had still been enough for everything to function properly when I checked before starting to play). To free some memory space, Firefox then performed an action which I will not be able to identify (please describe to me what this action was if you can) that resulted in me getting logged out of websites in which I have created accounts. I had no trouble logging back in everywhere except for blankslate.io, where, because of the way the notes are saved on the specific browser only and my lack of a permanent account, I now have no way of accessing my work, the site displaying a message of "This note is private" if I try to open one of my saved notes from either my browser history or my frequently visited sites. Neither is there any way of contacting the website's developer, because of the site's nature, or finding advice online, as the site is not a widely known one. Is there any way for me to regain access to the notes I had saved on this PC's Firefox browser? I still have access to all of the notes I had saved on a different browser or on different devices, so all of my work has not been lost, but this PC's Firefox browser contained, among others, my single most important note, one I have been using daily for 5 years and am highly distressed about not being able to access anymore. Please get back to me at your earliest convenience and, if it is possible to provide me with a way to resolve this issue, I will be immensely grateful.

Thank you for taking the time to read my request, I truly hope there is some way someone can help. (I can add the optional troubleshooting information as well in the case the issue can be solved with its help)

I lost all my bookmarks after the Nov 2025 update for Firefox. Couldn't find the backup file - not sure if Mozilla backed up the bookmarks before the update! If yes, please share path to find backup.

Today I closed Firefox as usual. It wrote recovery.jsonlz4 and recovery.baklz4. (Sorry if I’m missing some details, I’m just a bit upset.)

On the next launch, it didn’t show a window (most likely due to gWSL). I knew that after the next exit it would rewrite the session files, so I backed up .mozilla. (At that moment I didn’t realize recovery.jsonlz4 was already overwritten.)

I killed Firefox and WSL, restarted, restored .mozilla, reopened Firefox — and it rewrote recovery.baklz4 with an empty recovery.jsonlz4. The session page showed nothing. I panicked, because my previous .mozilla backup is very old.

I found out there may be a way to recover if I don’t launch Firefox before copying recovery.baklz4 to recovery.jsonlz4. So I closed Firefox, restored .mozilla again, checked that the .baklz4 file was larger, copied it over the .jsonlz4, and opened Firefox. It successfully restored everything.

Why do I need to manually back up session files? Could they be versioned, or at least not replaced by an empty session?

If the only tab is about:sessionrestore, that usually means something went horribly wrong, and it shouldn’t overwrite the previous session.

Relying on third-party extensions doesn’t solve the problem. Replacing a valid session with a blank one leads to data loss.

As you probably understand, this isn’t the first time I’ve lost data because of this behavior. This time I managed to save it, but previously I didn’t know these steps and lost my tabs.

I had already done as Paul suggested, but there was only one profile listed, named Default. I have found the place where the profiles are stored, and I have a private back-up (.json file). But none of this is useful if Firefox won't open the Choose File window from the Restore option in Library. What else can I try?

Dear Support Team,

I am writing to request assistance with an issue I encountered after a recent Firefox update. After opening the browser, an automatic updat led to making all of my bookmarks, saved passwords and website data disappear. The profile I was using had been active for over two years and contained important information that I now cannot access (it wasn't a profile I created myself, I just used the browser normally).

I have already tried several troubleshooting steps, including restoring previous profiles, checking the profile folder, and attempting to recover data from backups. Unfortunately, none of these attempts have been successful so far. The about:profiles website tells me my old profile does not exist but in my Firefox folder, there is a (profile?) folder from 2023 which contains only one file.

Could you please help me recover my previous Firefox profile or guide me through any additional methods that might allow me to restore my lost data?

Thank you very much in advance for your support.

Kind regards, Sophia

Firefox updated. I know no longer have access to my bookmarks, saved links, and passwords. How do I revert back to previous version of Firefox? How do I retrieve access to my passwords, bookmarks, and saved links/pages? I will need easy step by step instructions.

Any assistance would be greatly appreciated.

Thank you.

it's my fault and i don't know what i did: set FF to always restore previous session but closed several multi-tab windows when tabs were restoring, including - i think - truth.social.com, which was carrying one of those windows, possibly misusing the restore all tabs selection.

the best way to help is for you to draw a picture of me, deleting by mistake, and then reporting to you.

i will continue on my own, reviewing the "help" focusing on "restore", and will put as many tabs (ugh) back in windows they belong in. don't worry. it was me, and the effort will be worth it.

thanks for everything moz and FF.

Whenever my laptop starts up,firefox with all of my tabs always starts up with it. When i rose up earlier in the day and started up my laptop firefox with all my tabs opened up as normal,but this evening everything is gone. I had at least 20 tabs open and they were all important. There was no option to recover the tabs and this isn't the first time this has happened,this is at least the third time that this has happened after the last year and a bit. This is incredibly annoying and frustrating. Is there even any point in asking the community how this can be resolved?

FIrefox version 145.0.1 on a Windows computer.

Recently, whenever I open Firefox all my bookmarks are gone.

Booksmarks Toolbar is set to Always Show.

The only way to make them show is to uninstall and reinstall. And I have to do this every single time I turn on my computer. Getting very sick of this very quickly.

Hallo mein firefox hatte pobleme weshalb ich es neu installiren musste seidem werden mir nicht mehr die passworter und lesezeichen angezeigt ich wollte fragen ob sie mir dabei helfen können.

After most recent update all my bookmarks and passwords disappeared and I cannot seem to recover them. This is extremely frustrating. Has anyone else had this happen? I tried using the recovery process but it did not work.