Firefox, I've used it for years and I never quite got used to any other browsers. Plus I hate google and even forks of chrome I distrust a little since IDK how much google can get into those. Firefox works on most websites I throw at it, and whenever I have troubles I put it on safari or vivaldi as a last minute thing.
Firefox imo, gets better every day, containers, the built in pdf editor, and privacy features make it incredible. Plus you can still customize it with userchrome. I made mine look like the old australius layout from the mid 2000s with the wavefox customization.