Doesn't work on Waterfox ,no WebGL. ,not that i play browser games anyway :)
Apparently you can force it on in about:config if you're desperate.
It runs in HTML, not WebGL so I don't think that's the issue. Try refreshing the page or disabling extensions and see if that fixes the issue.
Oh ,weird ,it flagged up a warning about "missing WebGL".
Thanks for the info ,probably just related to Waterfox Classic ,i would think the normal Waterfox would be ok as would other browsers.