Diễn đàn hỗ trợ Firefox

For no apparent reason, all Firefox 140.0.4 on Windows 10 crashed and when it was relaunched it did not restore any open tabs, reverting instead to the home page. All history is gone, no previously open tabs are windows appear in the history list. This computer has syncing enabled.

I used about: profiles on the Win 10 machine and it only shows the one that is currently in use. I copied the 2 files found in the along with places.sqlite into a temp directory. I did a search for index.dat and it is not found on the Win 10 computer.

Even worse: another computer running Win 11 that is syncing with the Win 10 machine is also now missing its history. Is there a way to recover from this?

Note: I am generating this from the Win 11 machine, not the problematic Win 10 machine.

I am trying to recover my bookmarks/passwords/settings after a recent crash but when I sign into my mozilla account where I had everything synced, I get the default bookmarks. I have tried all of the backup options in the forums and searched my pc in AppData and my profiles are no longer there.

Is there a way to restore my synced data from a few days ago?

Hello, I just wiped windows and lost my bookmarks, passwords, and the like. I looked into the support options, as well Firefox profiles (about:profiles) but can't seem to get that data back. It's odd to me that it didn't sync because I also wiped windows last month and it recovered all of my data as soon as I signed into my Firefox account,so I was hoping that would happen again.

Any way to get this back?

Thank you.

I thought that synchronization would save my data so that I could prepare my PC for reinstalling Windows. As a result, after all the procedures and installing the Browser, synchronization does not restore my data. It's very disappointing. And the history of old sessions is completely erased.

I've been trying to get this computer to work. The last time a clean install was done a few days ago Firefox immediately remembered my favorites, extensions (or one important one of them) and the configuration of the browser.

Thanks for your Help

p.s. I sense there are changes at firefox. is there something I should know?

Hi there,

I know this is dumb, but I cleared my iMac's cache and nuked my entire history, password and bookmarks. This is catastrophic :( Can you please assist with any steps that may be able to allow me to recover this data? I have icould and it's synced, and I have a Firefox account but I cannot seem to find any way of restoring or accessing some backup. Please advise. Thank you!

Marcus

I have to do a clean install of Windows, how do I save all my firefox bookmarks and passwords as well as Thunderbird addresses and any other info I might want to import back into Firefox and Thunderbird once I've installed windows again.

I can't sync my history and bookmarks. As for my bookmarks, backups have stopped for about a month. I can't export them as html files either. As for my history, the file download history is no longer displayed at all. I've tried refreshing Firefox, but that didn't work. Is a reinstall the only solution?

I'm not sure I have the right topic as I didn't see what I will try to say. The problem is when I send an email (googlemail), I cannot insert a photo/picture in the email. The only thing I can do is attach which I do but want it inserted too. This only started happening about 2 weeks ago. It is now to the point where I have to use another browser to get it to work as it should. Any ideas why?

So.... I ended up getting a new laptop and I signed in on my mozilla account and it turns out I have lost everysingle bookmarks/saved stuff / passwords etc....

Now... the thing is I do not have my old laptop anymore cause it doesn't even turn on.. I did not make a backup cause I thought all this information is saved online...

What do I do now to get my old stuff back???

Thank you

Dear Support Team

I hope this message finds you well.

I am reaching out to report an issue I am currently facing. I recently changed my device, and upon attempting to sync my Mozilla Firefox account on the new device, I noticed that all my data—including bookmarks and saved passwords—appears to be missing.

Please note that my previous device is no longer in my possession and has been formatted, so I no longer have access to the original data.

I would greatly appreciate your assistance in recovering my data and saved logins, as many of them are not stored in any other browser.

Thank you in advance for your kind support. I look forward to your response.

Best regards,

For several days now, I have been unable to use Bank of America login and passwords. The login appears correctly but the password fails to appear. Also I can not put in my password. What is going on?

Hello there. I had to recently wipe my computer on 4/12/2025. I forgot to sync my bookmarks and passwords. Is there any way I can possibly get these back? I don't know how far back Mozilla itself keeps files, I've been told they do but I'm not sure how far back.