Qutebrowser is a keyboard-focused browser with a minimal GUI. It’s based on Python, PyQt5 and QtWebKit and free software, licensed under the GPL.
It was inspired by other browsers/addons like dwb and Vimperator/Pentadactyl.
Ranked in these QuestionsQuestion Ranking
Pro Highly customizable
And quite easy to configure. You can even write your own config.
Pro Fast and light on resource usage
Pro Vim-style keyboard shortcuts and commands for rapid navigation
With suggestions/auto-complete to reduce the learning curve.
Con Requires additional support and plugins for video playback
Con Steep learning curve
If you're not a vim user it will take some time to get used to the shortcuts.
Con Poor adblock in comparision to ublock origin
Con Software rendering only with Nouveau Drivers
As it is mainly written in Python it's startup is slower than the competition.