[mistaken]

Strafing works for me on linux with firefox. Maybe it's an OS or browser setting that prevents it?

[hnlmorg]

It’s not available on touch screen devices.

[plussed_reader]

Bluetooth keyboard to the rescue!

[casenmgreen]

I also FF on Linux.

But I always redefined A and D as strafe-left and strafe-right.

I literally did not know the keyboard shortcut to strafe, because I have probably literally never used it.