"Oh sorry, I can't remember exactly what my comment was originally, but IIRC it was just a link to news.ycombinator.com. Either way, one has to be careful with extensions, I agree. They have all sorts of security holes. We try to be as open as possible about what we do though and keep it super simple. Less code means less chance of a hole. Here's a talk I gave on how we made ours and how they work in general: http://www.youtube.com/watch..." - Oleg Podsechin