
While the technologies used on the web have always been mostly free, with non-free technologies delegated to non-essential parts of the net, this has been changing fast, lately. The popularity of YouTube has demonstrated the pervasiveness of Adobe's Flash, to an extent where not having Flash is one of the big downsides to any alternative operating system. And to possibly make matters worse, Microsoft is pushing its proprietary Silverlight technology. The founder of Mozilla Europe, Tristan Nitot, warns for "the dangers of the proprietary web".