Vivaldi seems neat, which is essentially Chromium with a HTML5 GUI built by the old Opera folks intended to restore the best features of old Opera, with a heavy focus on customization.<p>My hope is that Mozilla will take the direction of using Servo to build something Vivaldi-like (instead of everybody running with Webkit&#x2F;Blink) and start to restore old API:s and frameworks from old XUL-Firefox that all the best old addons relied on (things llike NoScript, Session Manager, Vimperator, uBlock, Tab Mix Plus, etc...) instead of just sticking with a blackbox rendering engine and settling with Chrome addon API parity.