Safari is the first thing I launch when I open my Mac and it's the last thing that I quit before shutting it down. If you're looking for battery life and RAM to spare for other applications, use Safari.

Safari is a fantastic browser, actually.

It's as fast as Chrome and Firefox. (Firefox is curiously sluggish on the Mac, even when the latest Quantum improvements.)

Sure, it tends to lag behind when it comes to adopting certain newfangled web technologies, but it supports everything that's important (even web workers now? I think?), and it's super stable.

I use Chrome for web development, though, because of the built-in dev tools. (The tools are pretty gnarly for 2019, but they get the job done, for the most part.)