Horizontal scroll problem on Firefox?

Don’t know if this has been reported but horizontal (left to right) diagram scroll doesn’t seem to be working on Firefox for Mac, Firefox version 57.0.3 64 bit. The vertical scroll works perfectly fine on Safari and Chrome.
P.S. I’m on a Macbook Pro using the laptops touchpad (no mouse).
Not sure if this is due to GoJS or Firefox… or something else…
Vertical scroll seems to be working.

We’ll investigate.

You are specifically talking about two-finger panning with the Mac touchpad, correct?

Yes, I am simon.

I’ve tried it on this sample (just now)

Thanks. I see the functionality difference here between Firefox and Safari. We’ll find a resolution soon.

Chrome also works as well as Safari. The problem seems to be specific to Firefox.