In gnome under wayland the swiping tracks, i think. Its new - might not be in the version in ubuntu yet. Also, wayland has its issues so im not using it yet.

You’re painting this as a fault with Linux, but it’s almost certainly the fault of a desktop environment. Were you using GNOME? You can adjust the way that trackpad scrolling works in Firefox and in GNOME Tweak Tool, IIRC.

The fact you have to configure anything for scrolling to work smoothly on a web browser paints linux in a bad light itself. The main reason i do not watch to switch to linux [apart from missing adobe catlogue and sketch] is stuff like the track pad, being able to navigate around using various gestures, having little things like invisible scroll bars etc. Subtle animations and visual queues really make the experience smooth. Its not even about eye candy, just seemlessness so your mind doesnt notice the workflow - which is what you want. The latest ubuntu doesnt even let you drag drop on the desktop? i really want linux but it still seems miles away from sleekness of osx

Hey you might be right that has changed recently - https://bugzilla.mozilla.org/show_bug.cgi?id=1564238

I'll have to dig into it more