ModdIt
I think the users will have to work in home, or a mini script be offered to make things easier.
User would have to run that.
Replace/restore config and privacy settings is the most bothersome part.
Put in perspective mozilla has in the past done way more than this to the detriment of users.
The present i9ssue may also by the mozilla man at head of the config file.
Maybe be nice to have an advice notice with fox update, something along the lines of,
due to an unauthorised upstream configuration change affecting user privacy, pls save your user.js prefs.js
if you have made changes, delete the home. mozilla config and cache folders. Check and/or replace your user
configuration .js files.
AntiX team is sorry for the inconvenience.