Microsoft Edge for Windows 10 is a very good browser. It's fairly standards-compliant (much better than any version of Internet Explorer has ever been), it's fairly lightweight - something that a lot of browsers (I'm looking at you, Chrome) aren't anymore these days and it is fast, too. The only real issue is that there is far less customisation compared to Firefox, and the poor legacy of Internet Explorer makes people think Edge is bad. Best of the best for me.
If you don't have Windows 10, I strongly recommend Pale Moon, a fork of Firefox that uses a different layout engine (Goanna, fork of Gecko) and keeps the original interface and will also be compatible with NPAPI add-ons after Firefox scraps them.