Step 1. Jurisdiction passes law restricting encrypted secure social platforms, requiring back doors, etc.

Legislation has criminal penalties for non compliance.

Step 2. Jurisdiction will take 1-2 years to "police the perimeter" and identify entities within scope of the legislation.

Step 3. Ban-Hammer nails down non compliant platforms, enforcement phase. Usually 3-4 years after passing of legislation. 

We are (in UK, Canada, aus, EU, ) currently in step 2.

Mozilla and all other entities may bring enforcement matters to court however once a law is passed it's really hard to argue against it.  Judges enforce the laws and interpret them.

I wouldn't assume mozzila backing protects from 1984 government.  Problem is most of those entities are doxxed and thus have balls to grab.  Government will grab them and squeeze.

solution : don't be doxxed. dont use legal entities like foundations or not for profits for your projects.  Do them a-la-satoshi and give a finger to the central state