> Firefox only survives because of Google, and that's so they don't hit antitrust problems.

Yes, that is what I meant. They should be hesitant to lockdown completely and (grudgingly even) allow alternative options and/or workarounds due to legal concerns like anti-trust.

Firefox was existing before Chrome, but in this case we either need a different OS or need an android based option like Graphene/3rd party stores gain enough marketshare to trigger anti-competitive laws.