Edge is probably what you're looking for, but don't discount the latest version of Vivaldi. Great little browser with tons of features and they've done a fair bit of work on speeding it up.

Stick to the built in chromium edge browser. It's a high class browser with very good startup and performance. The RAM usage and CPU usage is far lower than Chrome (not the lowest but still the best). For privacy, it has built in privacy and tracking blocking measures which you can customize to your heart's content. Brave does use less CPU and RAM and has better privacy options, but I'd stick with edge and not waste any storage downloading extra browsers for Windows 10.

I use brave, maybe you won't like it, maybe you will, but I'm happy now, after I move from Firefox. Btw Firefox is great too.