Updated to latest FF. Now session restore no longer works. I have checked, the sessionstore-backups folder for changes. When launching FF the folder is created and recovery.jasonlz4 is created. As tabs are added a recovery.baklz4 is created. When FF is closed, the sessionstore-backups folder disappears and is gone. When FF starts again, the above repeats. So as such when it starts it sees no session restore so it just continues to the default homepage.

How do I get session restore to work properly again?