IME Firefox (esp with the right extensions, like autosuspend tabs) is very light on system resources. A bit more so than chrome. I run only Linux though.
All the "websites that should be a program" (Netflix, Hulu, Slack, Amazon Video) now run great in FF, without my computer overheating. (though some of them might be on the chopping block if they don't quit blocking me from seeing HD content)
I hear Apple does some special magic in MacOS so that on that platform Safari actually works (compared to the ~real~ non-Apple world, where Safari is slow as heck and why would anyone ever touch that with a 10ft pole.)
Honestly I do not think Apple does some special magic on Mac OS for Safari. I settled on Vivaldi (a chromium based browser with built-in ad blocking developed by former Opera devs). It gives battery life not much worse than Safari to be honest. Safari is very nice and snappy on a mac, but the extension support is extremely limited.
Orion has Safari-level battery usage and performance thanks to using WebKit, while providing much better extension compatibility and a built-in ad blocker: https://browser.kagi.com/
All the "websites that should be a program" (Netflix, Hulu, Slack, Amazon Video) now run great in FF, without my computer overheating. (though some of them might be on the chopping block if they don't quit blocking me from seeing HD content)
I hear Apple does some special magic in MacOS so that on that platform Safari actually works (compared to the ~real~ non-Apple world, where Safari is slow as heck and why would anyone ever touch that with a 10ft pole.)