Works smoothly in Firefox. But the default key mapping is busted: fire at Alt means that it opens and closes the menu in Firefox with each press. Also, Alt + left arrow ends the game and goes back in history.
Interestingly, it was more choppy in Chromium.
I could not find a key for moving sideways ("strafing").
All in all, quite mind-boggling.
Strafing is implemented on A and D at least, but having one hand on the arrows to turn and WASD to move is a bizarre mix of modern and original controls
There are some new key-trap ApIs that can handle that, IIRC FF don't handle that part as well as Chrome.
> Interestingly, it was more choppy in Chromium.
Firefox's WebRender is truly a great creation. While Chrome is faster at most things especially involving JS, Firefox puts so much of its rendering on the GPU so moving elements around is incredibly fast.