У вашего броузера проблема в совместимости с HTML5
buttons:
"pause" - for free camera
"page up" - for fly up in the free camera function
"page down" - for fly down in the free camera function
"q" - for enable CameraForwardOffset in the free camera function (0,0 be default)
"p" - center to some object (not for all scene mesh, only for guns, peoples, animals)
"n" - show some object coordinates in the free camera function
"b" - show object or pivot name
"+" - increase FOV
"-" - decrease FOV
"*" - activate debug menu
"/" - increase speed time
"e" - show bones your soldier (you can see this if your camera be around your soldier in the free camera function)
"num lock" - decrease speed time (freeze speed time)
"f10" - disable HUD (button work not in the free camera function)
if you stay and press "pause" and then very-fast shoot and up your mouse - you can fly with your person\soldier.