There's obviously more to a browser than its battery consumption, but nevertheless that is an important consideration. M2 App Monitor's Community Reports provide a useful guide.
Well, I came here to post a thread asking about most energy efficient Web browser for android and I found this thread.
I can't believe chrome is most energy efficient. Is there something more energy efficient than it? It still drains my battery on my oneplus one. I usually have 10 or less tabs open.