I am not too concerned. I think Mozilla will simply have to switch to a donation based system (like Wikimedia Foundation), with relevant restructuring to a non-profit. And I think they will be able to raise 10s of millions of dollars.
We'll see if Mozilla will be able to achieve that. I hope so. I want it to succeed, but according to Mozilla that donation based structure would be impossible.
While you could be cynical, I think people using Wikipedia are way more numerous than people using Firefox.
I think it's inevitable that the future will be dominated by a Blink based browser. It's omnipresent on mobile and the desktop will probably just be Edge (a Blink derivative).
If they crash and burn someone can just fork the project from their ashes. I think some group will take it on because it's important to have another rendering engine that's not Konqueror-derived.
That is simply not true, if we take the fact that 60% of search traffic in USA comes from iOS that is all from WebKit and not Blink. Even Chrome and Firefox on iOS uses WebKit.