A window with all its tabs dissappeared, won't show on restart...
Merely typing an email when the tab and window it was in shut down (am using linux mint and most recent FF build.) I have difficulty understanding programmer directions as typically given but can follow a path > to files and folders. I found firefox old backups and sessions folder but none of the session restore files are dated, won't open and won't restore. I wish there was a straight-forward path to restore "my sessions" when issues develop. Just show me where the file path > where the files are > and what to click. Thank you.
As a backup to Firefox's built-in feature, you could consider a session management extension. This is my 2021 list, and I don't know whether these are still the most popular options:
Use database storage:
Use bookmark storage:
Bookmark storage is more robust in that Firefox backs it up regularly. However, having the extra data show up when you are searching your bookmarks may be annoying.