> (62.5% market share – although given the amount of broken websites (some explicitly Chrome-only!) I’ve found since switching to Firefox.

There is a reason why this percentage is high. Other browsers suck, firefox for me takes forever to start and don't get me started about how long it takes to load a website. It has been copying chrome with it's last few updates but still way too far. I would happily switch to an alternative to chrome which is equally good or atleast is near it but there aren't any I believe.