I am not sure I understand. Mozilla is more dependent on those 400M than apple on 10-15B so (hypothetically) they are more willing to please Google or at least

I am not sure I understand. Mozilla is more dependent on those 400M than apple on 10-15B so (hypothetically) they are more willing to please Google or at least not to disturb them much, than Apple. So, purely from revenue pov Firefox is nearly as much concerned about google's bussiness as google is.