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.
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Pro Vim-style keyboard shortcuts and commands for rapid navigation
With suggestions/auto-complete to reduce the learning curve.
Pro Fast and light on resource usage
Pro Highly customizable
And quite easy to configure. You can even write your own config.
Pro Great for Privacy
Makes no unexpected network requests by default, unlike most other browsers (Chrome, Chromium, Brave, Firefox, etc).
Call custom scripts on web pages or links (hinting mode).
You can use this for downloading of videos (youtube-dl, adfree), saving web pages as pdf or adding news sources to your RSS reader (newsboat).
Con Software rendering only with Nouveau Drivers
Con Steep learning curve
If you're not a vim user, it will take some time to get used to the shortcuts.
As it is mainly written in Python, it's startup is slower than the competition.