In terms of newer browsers, I started playing around with Zen after seeing a post about it on HN some weeks ago. So far, really liking that experience. It's not without bugs (i.e, 'compact mode' shortcut works about 50% of the time lol).
But, the UI is good (to me), and I like that it's based on FF rather than another Chromium shell.
I should say though, I don't consider myself a 'power user', and I'm not a web developer so never user the dev tools.