Pretty much every single browser today with the exception of Safari and Firefox are built on top of chromium. Google owns it and will direct it whatever way it wants.
If Firefox market share continues the small amount it is, there’s a good chance that websites will just block anything not running on chromium after v3 goes out. As it’ll be a decent price to pay to lose 4% of your users but force the other 96% to watch ads that they can’t block anymore.