New Firefox: Firefox Quantum -> Is it fast?

Firefox said Firefox Quantum is over twice as fast as Firefox from 6 months ago. It is built on a completely overhauled core engine with brand new technology. Its features:

1. Uses less memory

2. Surf a ton of pages

3. Open a zillion tabs

....

Source: https://blog.mozilla.org/blog/2017/11/14/introducing-firefox-quantum/?utm_source=twitter&utm_medium=social&utm_campaign=quantum-launch-2017&utm_content=launch-blog