Engines are important, both in cars and in browsers. That’s why we’re so revved up this morning – we’re releasing the Beta of a whole new Firefox, one that’s powered by a completely reinvented, modernized engine. Since the version number – 57 – can’t really convey the magnitude of the changes we’ve made, and how much faster this new Firefox is, we’re calling this upcoming release Firefox Quantum..

• Start Your Engines – Firefox Quantum Lands in Beta, Developer Edition, 26.09.20017 - https://blog.mozilla.org/blog/2017/09/26/firefox-quantum-beta-developer-edition/