At that point its out of your hands. Once the users have fully decided only one browser is all they're going to use, because most websites only develop for that browser (gee sound familiar?) then whoever owns that browser owns the web. That's the point people are trying to get you to understand and you aren't getting.
its not like we wont notice a shift like that. It would be very easy to adapt
This has has happened before. It took over a decade to get people to start using other browsers. Your little company can't wave a magic wand and make the entire internet ecosystem shift, even though you were part of the cause.
Firefox market share is going up. But because small vendors not testing on it, it's preventing its adoption. So you're letting Google own the web.