Quote Originally Posted by Calinou View Post
It's not entirely their problem: to block it, they have to do something against it.

In this case, they are doing something to promote it. To "block" it, they would just have to do nothing.
The whole point here is that the browser is just running regular javascript and accessing the WebGL api. Mozilla has no control over whether that code is from a proprietary codebase or an OSS one.