That depends on behaviour.
> I've read it this week in some interview with the FF developers that ever since MS gave up on homegrown Edge engine and adopted Chromium/Blink their voice on the standards committee is weak and lacks clout.
As if they had much to say before... But that's the point, your influence depends on what you do and who is backing you. Chrome-Edge is just too small and Microsoft is not doing much to build their influence at the moment.
> Well yeah. But it just sounds a bit simplistic to say "just earn that $500 million profits somewhere so you can sponsor your side project Firefox".
If you have a budget of some hundred million dollars and a very big and enthuastic community, then it's very easy to make money. Even having enough money at all can make you money, though this might be ruled out for Mozilla because of their legal status.