Firefox Community Forum

Hello Firefox team,

I did update my Mac to IOS 26.0.1 and I have lost all the history and bookmarks, I have the "Sync" enabled with my browser.

All my important data has been lost, can you please look into this and help me please.

Thanks, Sajeel Irkal

When using "about:support" on Firefox I'm not seeing my "profile path". Are there instructions on this method to make sure I don't loose all of my OneTab-tabs, or should I use another method? A FF comment: If you have a backup of this profile folder than you can restore your data...where do I find this folder?

You also suggest using a backup program--not sure what this means. How do I run backup software on my computer to restore my Firefox profile folder (a file path) ? I do have an external hard drive continuously backing up my files, however I don't know if this will back up browser settings/data whether it does or not- do I need to search for doing this from the manufacturer or from you.

Another suggestion from your help articles: If you don't use our "backup/sync feature, then the only way to recover the deleted data is if (a repeat of the above suggestion )you run backup software on your computer that can restore your Firefox profile folder.

I'm confused on what the backup/sync feature is referring to, unless you're talking (install FF on my Chromebook" so that it puts all my settings and data onto that device? ...sorry.

My problem is Microsoft is giving ppl until Oct 13th (2 weeks away) to upgrade to windows 11. I'm afraid I'll lose all of the FF windows and tabs that I moved into OneTab. This was hundreds of hours of work not to mention the amount of money I've paid to access these websites for research.

Any response would be greatly appreciated...I saw a comment that FF is working on a solution for this but I may not get it until it's to late.

~~Sharp63 (LOL I'm now 78)

OMG..I just saw and update available for FF. Based on what I just read, it's possible I'll lose all of the data in OneTab, What should I do...thinking! First thing is I'll look to see what the update is about, then decide.

I know the system backs up bookmarks every day or so. I want to migrate all to a new PC. With a new Laptop it seems to have done so automatically, maybe through synchronize feature, I am not sure how I did that . I normally export bookmarks to a external flash drive as HTML. Just did also to a .json file type cannot find how to do that. Which format and method will be best? Have all of the old PC backed up through Acronis full back up. Will that have the full Firefox program with the bookmarks?

I last sync my data on 31, August,2025 and delete all password from the device now I only have my passwords and bookmarks etc all data sync to Firefox account. And today I tried to login back to get my passwords, I forgot the Firefox account password and reset the password by clicking on forgot password and reset my account password. But my all synchronized data , passwords, filling forms, bookmarks all gone and I had nothing left. Kindly give me my data and passwords back and if you need any verification from me that it's original me person. Kindly cleanse give me a backup of password as I really need them. My all PhD thesis , all data there and I didn't remember any passwords. What to do now. I am very much depressed please help me out

I recently logged back in to my Firefox account that I hadn't logged into in about 3 to 4 months and all my passwords and links in the sync part are completely gone that took me years to setup. Is there any way of recovering them? Where did they do? I am positive I did not delete the account sync information. I would greatly appreciate any help in this matter.

Hi, I’ve lost all of my saved passwords, bookmarks, and browsing history in Firefox. I’ve been a Firefox user for over five years, always tied to the same Firefox account email. My laptop recently had to be repaired, and the technicians performed a full reboot. After getting it back and reinstalling Firefox, all my data was gone. I tried recovering an old profile, but the reboot erased everything, so there are no old profiles or local data left on the device. Since my Firefox account has always been connected to the same email, I was hoping all of my data would still be recoverable, but I haven’t had any success. This represents over five years of saved information, and I really need help to restore it. Can Firefox support assist me in recovering my data through my account? Thanks in advance.

Hello, after changing devices, I had to change my Mozilla password because I could not access my password manager at the time. When syncing, I realised everything had disappeared. I still have the old password, have changed it back to the old password, is there anyway for me to get my data, I have no copy of my bookmarks or history or anything?

Today I find out that was logged out of my Firefox accounts. it happends few time this week. When I tried to log in, I found that all my passwords were gone. The logins-backup.json file is empty. after i restore firefox account synchronization happened and I'm afraid that I lost all my passwords. so What can i do?

My primary PC died about a month ago, and the SSD is fried. I had it synced to both my phone and a secondary one, so no problem accessing things. I bought a new one online, and it just arrived. Then, when I tried opening all my tabs on my new PC, I found that they were no longer available, on either that one, or my other devices. This is new, because I had already recovered a few individual tabs to my phone previously, but I hadn't thought to open all 50-100 of them then since I was waiting on a new primary laptop. The device still shows up among the connected services on my account, but it doesn't show the tabs anywhere I could find, and since the SSD doesn't work I can't go into the files and manually port them over. Is there a way to solve this?

After Windows crashed, I installed a new system and logged into Firefox using my account. But all my history, passwords, bookmarks were erased. I also went to my phone and everything was gone. I didn't erase anything myself. Is there any way to restore the previous state of the account? Are there any backups on the Firefox Sync server?

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.