I use Safari. It’s fast, simple, and it integrates well with other iOS/macOS devices. I don’t use many plugins, prefer to keep things simple. At this moment, Ka-block! is the only one (appears to be an excellent free ad blocker) that’s active here.
I have Firefox (since I think it’s always a good idea to have a 2nd browser available), but I don’t use it a lot. It’s not faster than Safari, but it always feels a bit bloated. The GUI is busy and there’s options galore. I prefer Safari’s slick and simple.
I try to stay clear of Google as much as I can so no Chrome. Tried it a few years ago and we use it at work on some stations. Not a huge fan. It’s not faster than Safari. I used to like that it bundled Flash internally, but fortunately Flash has finally died. I couldn’t stand the updating-behind-the-scenes thing Google uses on it. Sure, not having to update yourself is nice, but not knowing when they change things on you just stinks. Adam’s mention of Brave got my attention. Sounds like a nice idea to reap benefits of their dev effort, while keeping Google out.