Firefox is responsible for such a low percentage it's sad (the stats I have for the sites I work on it's usually on the 1-2% range). I think it's mainly because of the horrible leadership at Mozilla. I want to use Firefox and promote it but every time I think they've changed Mozilla does something new that boils my blood. You can donate to Mozilla, but not directly to Firefox and they seem to spend a lot of money on political projects. It's a 'get woke, go broke' situation and I have watched the fall of Mozilla in real time over the past years.
I really wish Mozilla changed focus, I would gladly pay for Firefox+ or something if I knew that the money went to Firefox development and not to some racist white male hate project.
So I'll continue using Brave and hope for the best, the future the author is talking about is basically already here.
Surely, most of the time Firefox will work just fine or at least good enough and by that standard I am sure that a site that has put some focus for it being easier to read with a screen reader is more important?
Don't take it like I'm trying to be snarky, it was just funny to be in two minorities with contradicting significance for the developer.