Both chariot and mounted horse racing were events in the ancient Greek Olympics by 648 BC and were important in the other Panhellenic Games.
This was despite the fact that chariot racing was often dangerous to both driver and horse as they frequently suffered serious injury and even death.
All game activity by players from elsewhere in the world where such skill games are not regulated under any local regulation do not fall within the UKGC licence.
We do however operate the game according to the principles of the UKGC regulation for all players.
In the meantime one of two things can be done to continue to watch races with Firefox.