У вашего броузера проблема в совместимости с HTML5
Here I'm using a newly grinded (with a slight curve) skew chisel. It is very similar to Alan Lacer / Hamlet skew chisel, but it's some old Delta skew that I've sacrificed to see how it works. With this said, I'm definitely getting an Alan Lacer skew chisel! It's a must have!
Enjoy!