Earlier quoted context omitted.
Firefox on mac used to be like that, but recent versions (last year or two) haven't had that issue You're probably being downvoted for negging others' beloved browser
Yeah, I gave Firefox a second chance with the quantum updates but, I ran into all the same performance issues I’ve associated with Firefox since version 3
For example, one of the popular cargo-cult ‘fixes’ for the addons issue instructs Firefox via about:config changes to make 86,400 extra network requests per day, because the instructions are extremely badly written by people who don’t know/care about that impact on your battery life.
Expert user footguns are responsible for far more performance issues than expert users realize, both in Firefox and in all other software they operate. It’s so reliably a problem that I’ve been using “are you an expert” as the most important triage question for the past two decades of IT support.