Earlier quoted context omitted.
Reading comments here about problems using Firefox is odd to me as I never run into them. I feel like people are taking about totally different browsers. I don't remember the last time I had page rendering issues or was asked to use a different browser.
Its the same kind of people that claim Linux is too unstable for them, and when you ask when they tried it they say 15 years ago.
A few: Developer tools are quite slow; Airline websites often break during checkout; JS games and video players sometimes stutter or use a lot of CPU