- The Mozilla Festival and the Importance of a Free and Open Internet Last month, WITNESS was invited to participate in the Mozilla Festival held at Ravensbourne University in London. The festival brought together some of the Mozilla community’s best developers and put them in the same room as some of its most innovative online content creators to collaborate hands on to create new features and build actual working demos. The cry of "Less Yack, More Hack!" served as reminder to keep things concrete and tangible and not to veer off into the theoretical as so often happens at conferences.