If you're mainly on a Mac/within Apple's ecosystem, use Safari as your main browser.
Very fast, super easy on batteries on laptos, very good compatibility and great privacy controls.
There's also ad-blockers available that don't invade your privacy (they provide rule sets, not active code that could spy on you), e.g. 1Blocker.
If you're on other operating systems or often switch between them, Firefox is a great choice.
Personally, I use both these browsers.