Well I would say that the firefox userbase is 3%+ across all platforms (over 7% on desktop) and that is larger than a rounding error.
When you have 97% of the market, you own the market, right? It's actually problematic to own 100% because then it's strictly a monopoly. Whereas with 97% you can pretend it's not a monopoly.
Can we agree on "the vast majority of people don't care", then? Does 97% or even 93% qualify for me to say "the vast majority"?