Hello. I am a linux user. I updated firefox yesterday. I am using several profiles for my convienience, and exactly one (1) lost its ability to create new history, all the saved passwords, and all the plugin data. Along with the message "another application is using firefox file", which sadly give no useful details about anything. I have done a backup of that profile, and poked a bit at it ; all files seem here and are apparently correct. In particular, login.json is not corrupted, and I could add new passwords, which would appear in that file, but the 100+ passwords that I had before are invisible I have tried to see if firefox give any useful logs, but found none both on command line and in journalctl. Do you know how/where to find out what firefox don't like in the profile files ? I would *very much* like to not lose my passwords and login so it's my main area of concern.