Don't be sad, it doesn't seem to work on Chrome either :) To the authors: Personally I wouldn't put too much effort into cross-browser compatibility early on f

Don't be sad, it doesn't seem to work on Chrome either :) To the authors: Personally I wouldn't put too much effort into cross-browser compatibility early on for the sake of satisfying the users of niche software, but ... almost all modern DOM features are available cross-browser/platform these days and it will likely save you a lot of effort further on down the road dealing with deprecated APIs and other headaches to use it as a smoke test for code quality.