I use both Firefox and Chrome pretty regularly, but I'm under no illusions that the quality of Firefox isn't quite a bit lower in multiple very concrete ways for my day-to-day usage (presumably because Mozilla has less resources than Google).
In the past, I have switched family members to a _better_ browser, but I'm talking about IE6 to Firefox, the usability gap between which was 1) in favor of the switched-to browser and 2) waaaayyy bigger than Firefox v Chrome in 2017. Even then, if I had to make that same decision again today, I would probably first convince the person whose computer I was modifying. Especially for non-technical users, having things suddenly change out from under you can be really jarring in an environment that's already pretty confusing.
The price for me doing tech support for free on your laptop is the default browser gets switched to Firefox and Chrome gets uninstalled :-)