Firefox also supports https://developer.chrome.com/multidevice/android/customtabs .
It also has a very nifty feature (IIRC off by default) where if you click on a link instead of switching to Firefox it shows a "Tab opened in Firefox" toast which you can tap on to switch to. This means I can for example click on the links in an email whilst still reading it, and then switch to the browser later to read them all. This does make opening links two taps by default (tap on the link, and then tap on the toast), but there's no tap-hold so it's fast and nice. Plus my workflow prefers opening tabs that i look at later, not immediately.
Note that none of the Quantum work has been turned on for mobile Firefox yet. I hear it will be coming online in nightly this cycle, targeting Firefox 58.
I do have to find the webextension equivalent of half my add-ons though.
The thing that is not on mobile Firefox is Stylo.
> And since it's Chromium based I don't see the sluggishness I do in Firefox for Android.
The point of the article is that you'll be able to have a quick experience with Android, without using that one tracker called Google.
Interesting because for me it's the exact opposite: Firefox is fast but when I need to open Chrome (webview or full) it's a slow and painful process (tested on two phones, one 3 year old). Maybe it's because Firefox has everything cached and Chrome needs to load from network... Not to mention full screen, aggressive ads :)
For instance, it takes me exactly one click to open a link from the HN app I'm using in Firefox.
Trying the beta now though, fingers crossed!