У вашего броузера проблема в совместимости с HTML5
A review of recent mods that I found kicking about on the Steam Workshop, none of which are worthy of installing.
1 - The Fork of Unbelievable Power
2 - That's My Horse (Sound Replacer)
3 - Meaty Boners
4 - John Cena
5 - Some Really F*cking Weird Chickens
Enjoy!