I am also getting quite confused.
There are two different issues. The first one is about tests and quarantines. This is discussed above.

The second one is who is allowed to enter France.
It used to be that people from a list of ten countries (Australia, Japan, etc...) were allowed to enter even if they were not French nationals. Apparently that list has disappeared. Maybe it is just that websites have not been updated yet.
Anyone in the know?

Of course, any foreigner arriving from EU+ is still allowed in with proper travel documents.