Firefox Support Forum

I'm running version v92.0 (64) on ubuntu 21.04. Firefox would crash upon opening when signed in. It would stay active enough for me to disable the extensions & themes. After doing that it still crashed. I tried going into Troubleshooting mode and it would still crash. I went into Troubleshooting mode and did a refresh. It was still crashing. Finally I signed out of my mozilla sync account and the browser has stayed active long enough for me to type this report.

I've submitted all crash reports in about:crashes, and I'm not really sure what to do next.

Perhaps a local version of the Mozilla Sync profile has been corrupted? if so, is there a way to remove it and pull down the "sync"ed version from Mozilla's servers? What if the version on Mozilla's server's has been corrupted? should I back up the local profile (wherever it is) before removing?

I hope I've given enough information. Please let me know if you need further, more specific information.

Hi everyone,

Every morning when i start firefox i have problem like picture attach.

I try remove firefox and reinstall but not fix.

How do i do for fix?

I've had a smooth ride with firefox sync for a few years now and I have admired how quick and safe it has been. I was a long time xmarks user. However today it went off the rails. I booted a virtual machine for the first time in years and while on that vm I used firefox. That copy of firefox had never had sync enabled and the bookmarks were very old. I uncautiously turned sync on, thinking that it'd favor the current bookmarks over years old bookmarks. Nope. Now I find all of my active instances of firefox (all windows flavors) have bookmarks from 2016. Two things.

1. 1 What's the best way to restore my current bookmarks? I have backups from last night and maybe even more recent. I know how to restore bookmarks...but I'm concerned that sync will just repeat the same error and adjust to the 2016 set.
2. 2 How did this happen? I have gotten to trust sync so much that I just enabled on the old firefox without taking any precautions. That was probably a mistake plain and simple - sync is complex and that sort of gap in dates could be unanticipated. But still it seems odd that sync would favor an ancient set over the current set.

Firefox is a great browser and sync is part of that greatness. Thank you mozilla.

I'm trying to log out old and duplicate accounts from my firefox account list, I've managed to logout from all of those except 2 old account, if I press "sign out" button and enter the reason why I'm doing that it simply doesn't work, no errors no anything, it'll just stay there. any fix?

I've bought a new Win10 PC to (eventually) replace my old one.

I've signed up for a Mozilla account on the old PC, signed into it from the new PC and the favourites, history etc have come across ok onto the new one. The saved logons however haven't.

How can I get my saved logons to sync across from the old PC to the new one?

On my device list I can see old PCs which don´t exist anymore, but clicking the "sign out" button doesn´t sign them out. What can I do to remove these old devices from the sync-list ?

Firefox continiues to wipe all of my saved password and bookmarks. After fresh windows install, I signed into my account and figured out that all of my bookmarks are gone. It happend for the second time. I have a mobile device running firefox which is lincked to my account. It's also gone there. How can I fix it or restore my data?