Yeah, a few months (a year?) ago I was getting back into Javascript so I went to the mozilla website [1] to refresh my knowledge of prototypical inheritance. And it seemed all wrong. So I actually ran their short bits of example code in firefox and they worked like I expected them to. Their documentation is just nonsense.

There hasn't been a lot of activity on it recently so it's probably still wrong.

[1]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guid...