I'm crazy :-) so I use Firefox 99% of the time for both work and fun

Pontifications

I’m crazy :-) so I use Firefox 99% of the time for both work and fun; if stuff doesn’t work or I need a second user, I use Safari NOT Chrome.
I use Firefox on Windows 1-2 hours per day at work but my main work and fun machine is a Mac. (I’m probably going to switch my main work machine to a Windows machine (i.e. real Windows laptop from Microsoft or Lenovo or some such NOT Bootcamp on a Mac) at the end of this year because I’m crazy. I know I will hate it but sometimes it’s nice to use what most other people use!)
I use Chrome only 0.5% when google unintentionally or intentionally b*rks FF & Safari
Chrome appealed to me with its speed back in the day but since 2011 the speed difference for me has gone away enough not to matter #ymmv
And even back then 2008-2011 I only used Chrome <50% of the time!
Plus I don’t like the idea of Google knowing more about me!
But honestly they can mine all my photos and my emails for advertisements, so I’m not exactly on firm moral ground here :-)
Disclaimer: I don’t know anything about the Firefox code or Chrome code and I work on the Firefox support team so I am biased of course :-) I also don’t use E*ge on Windows because I irrationally still don’t like M*crosoft. #ymmv
More perspectives: Nick Nguyen - Jumping over guardrails and Eric Petit: Browse against the Machine