Firefox Community Forum

15/12/2025 I need to sync my firefox data from my old windows 10 laptop to my new windows 11 laptop. Do I have to download the firefox app on to my new laptop before I can sync it, and will I need a new password if I have to download the app. Im using my old password on my old laptop to write this. On the new laptop, I tried to sign into firefox on the internet but, it said my password is wrong. I'm an oldie and have no idear what to do. Iwill be very grateful for any help. Many Thanks,

                                                                                           Janet.

For some reason after I restarted my laptop (firefox was opened) Mozilla was reset. I was logout from my acc and also firefox isn't my default browser (I didnt anything with it). Btw if I tried to open any link system will open it via firefox. But firefox still said that its not default browser in system. And if I open default apps in Windows I have 2 firefox there (and both recommend me to set is as default). Except FF I have only edge that also said that I can set is as default. After I login in my acc in firefox I haven't anything. No history, no passwords, extensions etc. What I can do here? I tried to use sync but as result I still have nothing.

Never cough smth like this before in same cases.

Hello,

How can I remove all my saved passwords from Firefox Sync? On my desktop, I went to Menu > Passwords > Three Dots > Remove all passwords, and they're gone. However, on my mobile phone, they're still there. So the sync functionality is borked. The question is, are the passwords still on Mozilla servers, or is just the sync to my mobile buggy?

Even if I were to delete my FF Sync account, for good measure I'd like to manually delete all passwords from it first though.

Any help welcome.

I have 4 macbooks and iphone w. about 10000-19000 bookmarks. Last n. I noticed what I bookmarked on 1 machine wouldn't show on another. A pop up said "your profile has reached a limit. A device can have ony one identity..make another (sic)...." I did that, and found the bookmarks from "classic" profile, WHICH I'VE HAD ABOUT 20 YEARS, weren't imported. I uninstalled, reinstalled Firefox, managed to get the bookmarks back via a desktop folder I'd made, thank god! It didn't restore the 50 passwords, and still won't accept the previous password..which is another can of worms-it actually won't let me change my p/w w.o "you may lose your personal bookkmarks passwords etc!:" Even the 32 digit code (which I had saved) is not working...and it doesn't let you get another one unless you have a p/w!!!! Is this sounding a vicious circle....I am going to not use sync or another profile, b'c I'd rather keep my personal data (bookmarks) and rightnow, I was able to 'restore' to the original profile!!

Recently, Firefox has been slow and crashes regularly. I try to sync tabs but after it crashes and I reopen it goes back to a much older save and lose tabs I've recently opened or sometime after a crash and reopen it tries to open a window with no tabs and I lose all my tabs

Yesterday I only change the photo in my Firefox profile. Today I can't log-in to synchronize my account. When I click on "Anmelden" (German for "log-in") at the top right corner, a new tab opens, I can enter my e-mail adress, klick onto the button "Anmelden oder registrieren" (German for "log-in or register") it fades out and nothing else happens. I can access my account here as I logged in to send this message. What is the issue? How can I start synchronizing my account again? My Firefox version is 146.0 Thanks in advance, Chris

I have switched from chrome to firefox on my windows 11 laptop. I want to do the same on my pc but after signing into the Mozilla account, the bookmarks do not come in. History, and other things seem to work fine. I tried manually synchronizing in the settings over and over again but nothing works.

about:sync-log has the following: File:error-sync-1756470933956.txt 7 KB 29-08-2025 18:05:33 File:error-sync-1756472283448.txt 10 KB 29-08-2025 18:28:03 File:error-sync-1756472834423.txt 4 KB 29-08-2025 18:37:14 File:error-sync-1756475717646.txt 15 KB 29-08-2025 19:25:17 File:error-sync-1756537352383.txt 11 KB 30-08-2025 12:32:32 File:error-sync-1756550876616.txt 7 KB 30-08-2025 16:17:56 File:error-sync-1756555300057.txt 4 KB 30-08-2025 17:31:40 File:error-sync-1756596355421.txt 25 KB 31-08-2025 04:55:55 File:error-sync-1756614480046.txt 30 KB 31-08-2025 09:58:00 File:error-sync-1756616854913.txt 21 KB 31-08-2025 10:37:34 File:error-sync-1756638623482.txt 12 KB 31-08-2025 16:40:23 File:error-sync-1756639451332.txt 17 KB 31-08-2025 16:54:11 File:error-sync-1756652104368.txt 4 KB 31-08-2025 20:25:04 File:error-sync-1756653367478.txt 6 KB 31-08-2025 20:46:07 File:error-sync-1756704617631.txt 12 KB 01-09-2025 11:00:17 File:error-sync-1756802293749.txt 18 KB 02-09-2025 14:08:13 File:error-sync-1756824621856.txt 30 KB 02-09-2025 20:20:21 File:error-sync-1756881547437.txt 9 KB 03-09-2025 12:09:07 File:error-sync-1756910518609.txt 22 KB 03-09-2025 20:11:58 File:error-sync-1756914122579.txt 32 KB 03-09-2025 21:12:02 File:error-sync-1756945880430.txt 17 KB 04-09-2025 06:01:20 File:error-sync-1756956775316.txt 19 KB 04-09-2025 09:02:55 File:error-sync-1756970167229.txt 6 KB 04-09-2025 12:46:07 File:error-sync-1757001011892.txt 11 KB 04-09-2025 21:20:11 File:error-sync-1757001024107.txt 29 KB 04-09-2025 21:20:24 File:error-sync-1757046224475.txt 16 KB 05-09-2025 09:53:44 File:error-sync-1757046230938.txt 30 KB 05-09-2025 09:53:50 File:error-sync-1757057610720.txt 19 KB 05-09-2025 13:03:30 File:error-sync-1757081977371.txt 26 KB 05-09-2025 19:49:37 File:error-sync-1757093018785.txt 148 KB 05-09-2025 22:53:38

I have no idea what to do other than going back to chrome where things just worked and I didn't have to spend hours looking at forums for solutions that do not work...

here's a screenshot from the last txt file

I just bought a new PC, part by part, and used my storage devices from my old PC. I formatted the windows drive and am on a fresh installation of windows 11. I tried to log in to my mozilla account, but couldn't remember my password so I used the "Forgot password" function. When I logged in, no bookmarks or history was saved. Is it possible to restore my synced data?

Hello,

I synced my data today in mozilla and after that i reinstalled windows on my PC. now i installed fresh mozilla and logged in into my account but my data is not synced... i lost a lot of open tabs,bookmarks etc... what can i do? is synced version still somewhere or what? i did everything as i supposed to do but i cant see my previous open tabs and bookmarks..

Dec. 13 2025 08:44.hk m920t DESTKOP-FO76QM5 rbe..hN Attachment:1 Good day,

When 2D scanned to Sync mobile from Desktop-FO76QM5, error "Pair ...App" Using system camera ? ref. [Screenshot_20251213_083657_WeChat].png

To sync @gmail.com with Firefox, likely one PC won't Sync two accounts.Email, how to do that please? To change password of logging Sync at Firefox how to do that please? Regards [email removed]@netvigator.com HUANG, Li

I've installed FF on new computers a few times in the past year and I've noticed that it never syncs the Search settings (things like default search engine, adding StartPage, etc.). Is that by design? Is there a way to make them sync?

Solved, there is delay of 15 minutes before password appear on other device.

Hi,

I've labelled this thread as (dec 2025) as there is a lot of issues dating back to years ago so this is mark it down just as a fresh review of the issue.

The only thing I'm looking from a browser is to sync Passwords between Phone and Desktop and for whatever reason Firefox is not doing it. Absolutley nothing gets synced even though both windows 10 and Android browsers have been sync manually with all of the options to be synced.

I've followed all the others people checks of settings, account login etc. and I'm just giving up for now.

I had to have my laptop serviced. When it came back, I downloaded Firefox and logged into my account. Usually, all bookmarks and passwords would load back up, since they were bound to my account. Unfortunately, this time after had synchronization finished, none of my data was present. It's as if my whole account was wiped. The only thing I did was change my password. How can I restore everything?

Hi, i synced everything, in your browser, checked it few times, i had all my bookmarks from chrome to firefox few months ago, reinstalled windows, downloaded firefox and connected to account its clean, no of my information is there, wtf? i forgot the password, so recovered it. Give back my data for fuck sake, or it was mistake comming from chrome to firefox?

I have about a dozen computers synced to Firefox. The Bookmarks go nuts when an older seldom used machine powers up. I spend days cleaning out my bookmarks only to have old ones come roaring back. I have began manually backing my bookmarks up to a hard drive. Firefox has failed me. I wish to delete all, or some of the backed up bookmark files.

How do I do that!!! I've spent hours over weeks online trying to stop this madness. Can I wipe out all the files by deleting any of the three "places.sqlite files? Is there a way to selectively kill the very large files that keep coming back and keep the other recent backups?

Does someone sell a pay to play bookmark manager similar to Foxmarks / xmarks?

Thanks for your help Lee

Hello, my old laptop broke. I bought a new one, installed Firefox, and signed into my Firefox account. My add-ons synced, but my passwords and bookmarks are gone. I can't access the old laptop now. Is there a way to fix this without a backup file? Or are add-ons the most I can get? Both devices have been added to the devices in the Firefox account.

The subject says it all. The "tabs from other devices" are a) Shown as a long flat list of links, not in their individual tabs, which is disappointing b) right click does nothing - doesn't open them as advertised

Dear Sir or Madam,

I'm recovering an older Firefox Sync Account. I can login on https://accounts.firefox.com. My password is valid. I cannot login within Firefox (activating Sync). It simply does not continue - After entering the E-Mail-Address and clicking the Button "Sign up or sign in". The browser network debug show no (obvious) communication error.

Please advise.

Kind Regards, Stefan