Has it actually got Quantum DOM as well? I was under the impression that it was merely Electrolysis and Quantum Compositor (i.e. the speedups from Firefox 54), and that the massive on from 57 was still set to arrive?

The prioritization parts of Quantum DOM have landed. There is some work around preemption that still needs to happen. We should have a post talking about this coming out in the next few weeks.

I tried Android Nightly but there are still 2 small yet noticeable things Mozilla should improve (which are not at all linked to the page rendering in itself) - when it's done, it could really rival Chromium-based browsers:

- when you swipe fast, the page only scrolls by like 30%, instead of scrolling by 200% like in Chromium browsers. Basically it's impossible to quickly scroll a long page on Firefox (maybe it's configurable somehow in about:config?)

- when you long-press a link, it takes like 2-3 seconds for the menu to open. As I "open in new tab" by default, this quickly adds up.

Do you have to install the nightly build manually or can you opt-in via the default version?

Nightly and beta releases are available as separate apps.

Google Play store link for Firefox Beta: https://play.google.com/store/apps/details?id=org.mozilla.fi...

Google Play store link for Firefox Nightly: https://play.google.com/store/apps/details?id=org.mozilla.fe...

Wow, I didn't know Nightly got into play store, I installed it as an APK from mozilla site (upgrading APKs is painful in comparison to play upgrades).

Thanks!