Martijn
About a year ago I went back to Safari for day-to-day browsing. Empirically it seemed to boost my battery lift a lot when at university, which is great. I still miss extensions from Firefox/Chrome though, Safari's extension ecosystem really isn't too great.
John Olinda
Yeah, I switched to Safari for a little, and just couldn't get past the extensions being so limited. I run both Firefox and Chrome, but just having to learn to switch to Firefox when on battery to save my MBP from melting into a pile of battery acid and aluminum.