I prefer FF over Chrome on mobile. FF mobile allows extensions such as uBlock Origin and Google Link Fixer which I find essential. FF supports sending tabs to other devices, if that's what you mean by Chrome tabs.

Firefox on Android has awful scrolling physics. I will never be able to use it while the scrolling is different to every other app on my phone.

Last I checked they were using the native Android scrolling physics. I could be mistaken though.

If so then I don't know why it has felt so different to every other app on all 3 of my Nexus devices (currently the 6P).

I guess it depends on the phone. Scrolling is smooth on my HTC One.

It's definitely smooth. Too smooth, in fact. It feels like my finger is slipping on the screen. No other app does this.

Glad I'm not the only one - I love everything else about the app but, as you said, it scrolls differently to every other app on my phone. So frustrating. Sticking with Chrome for now.

FF is insanely slow on mobile. Scrolling in janky and rendering seems to be about 50% slower than Chromium

Maybe it's your phone?

Nexus 6 and yet doesn't make sense that all my non Firefox browsers are perfect

I don't know about iOS but the Firefox Android app is great and works with Firefox Sync, of course.

Yes it does. The feature is called Custom Tabs in FF but it's there.

Will it sync with another browser though.

That's asking a lot (chrome does not do that AFAIK) but that's the only way to allow me to use multiple browsers on different devices fluidly (and also to continue using chrome where it has an edge, like on mobile with chrome tabs)

The Firefox equivalent of Chrome Custom Tabs on Android is Firefox Focus, IMO. I use Focus for opening links from other apps, but full Firefox (beta) for actual browsing.