Other Tips

How to restore lost firefox session

close firefox

Select a file based on the date from this dir:
/home/ndemou/.mozilla/firefox/b0yfebj4.default-1512752060170/sessionstore-backups

copy it to this location:
~/.mozilla/firefox/b0yfebj4.default-1512752060170/sessionstore.jsonlz4

You can see the contents of the files using this online tool: https://www.jeffersonscher.com/res/scrounger.html

You may use your backups if any