У вашего броузера проблема в совместимости с HTML5
[Unity3D] [Javascript & C#] [Intermediate]
SphereCasts and CapsuleCasts are basically just thick raycasts. They just about as easy to use as regular raycasts.
Basic Raycast Tutorial: https://www.youtube.com/watch?v=hHaeiaXwSO8&index=4
RaycastAll Tutorial: https://www.youtube.com/watch?v=EmhOPJh7zUw
Raycast Layers Tutorial: https://www.youtube.com/watch?v=XO6KCCtGPpA&index=7
Spherecast & CapsulecastTutorial: https://www.youtube.com/watch?v=QbkGf74OehA