There were days when Firefox was my go-to browser. It was years ago. Right now Chrome is my #1 choice for daily driver. Opera seems to be doing pretty interesting stuff with Neon, so I keep an eye out for it and actually use it from time to time. Heck, I even don't mind using the Edge browser at work just because I actually really like the Microsoft Windows 10.
Now, Mozilla/Firefox has faltered in too many product deliveries in the past 5 years (I am mostly disappointed in their Firefox OS effort) while neglecting the browser. So the brand name no longer inspires me, whether or not the browser itself is good.