User Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:71.0) Gecko/20100101 Firefox/71.0
Steps to reproduce:
Updated Firefox to version 71 on Fedora Linux.
Extensions are unable to save settings, and keep resetting to defaults upon closing and reopening Firefox. The output of 'df -h' is currently showing 791G of free disk space on /home.
This issue report from Privacy Badger has additional people reporting the same thing, across different Linux distros: https://github.com/EFForg/privacybadger/issues/2474
My settings should have been saved and restored upon opening Firefox.