I've been tracking lots of programs with powertop, including many browsers, in the quest of an efficient desktop and Firefox is pretty good.

I also appreciate its great plugins. With vimperator I can configure Firefox using a dotfile, and setup lots of neat things like:

1. A ssh proxy mode that also routes DNS queries

set! network.proxy.socks=localhost

set! network.proxy.socks_port=8888

set! network.proxy.socks_remote_dns=true

command -nargs=1 proxy set! network.proxy.type=<args>

2. Site-specific Google searches, with autocomplete for the site URL

command -nargs=+ -complete=url site open google site:<args>

map s :site<space>

All this is really neat functionality, and very simple to achieve. I am waiting for good per-tab sandboxing, but in the meanwhile I have aliased firefox to /usr/bin/firejail so the whole application is sandboxed.

Apologies for the offtopic, but it's really exciting how a program that seemed to have lost development momentum is becoming really great again. Quite close to being the emacs of browsers if you ask me, with so many features and scriptability. Paradoxically you can get best access to these features with a plugin that tries to emulate vi, but you get the idea!