I'm honestly astonished that Google hasn't pulled the plug on Mozilla yet. After all, their missions completely and utterly oppose each other and Mozilla probably causes the biggest losses to Google.

If your prediction comes true, which isn't unlikely, Firefox forks that already exist would probably take its spot. Or privacy friendly Chromium based browsers. I know, the latter sounds like an oxymoron, but they exist and one of them I would be hated on for naming has actually been proven to have better out of the box privacy than Firefox.