High-res scrolling only works in chromium & electron programs

[Sycration]

I've tried to set up the high resolution scrolling with the MX MASTER 3, but it only seems to work in Chromium and electron based software.
Here's a screen recording of my computer and you can see the libinput events at the bottom showing that the mouse wheel really is working in high resolution mode. How do I make it nice and smooth in all programs, like it is in Chromium?

My config is dead basic, as follows:

devices: ({
  name: "Wireless Mouse MX Master 3";

  smartshift: {
    on: false;
    threshold: 15;
  };

hiresscroll:
{
    hires: true;
    invert: false;
    target: false;
};

  dpi: 800; // max=4000
});```

[Zaczero]

The software needs to support it. You can enable support in Firefox/Thunderbird with MOZ_USE_XINPUT2=1 env var. That's where my knowledge ends.