Hello everyone,   I've been having issues the last couple of days, because the arcade physics seem to be working unreliably in firefox. I have had no problems and no failures with it in Chrome.   In firefox every now and then the game lags (more of a stutter, very short freeze) and the arcade-physic collision detection fails. I can walk through walls, fall through the ground and jump through ceilings. Looking at the framerate reveals a small drop in framerate whenever this happens.   I also noti