I'm saying if Google can't throw billions at other companies to push Chrome over Firefox, Firefox can get those users for pennies on the dollar, or even be considered the free better choice for product vendors to include.
If Android OEM's aren't locked into Chrome, they'll probably request payment from Edge, Brave and other startup browsers to be the default. Whoever pays most will get the spot. And that browser will end up being ad-ridden to help pay for that.
I could totally imagine browsers having ad-blockers that don't block ads, but merely replace "bad" website-provided ads with browser-provided "good" ads.