Microsoft researchers were working on building a new kind of Web browser that would be more secure by isolating the browser from the operating system. "Gazelle, revealed a few interesting new tidbits. For one, Gazelle (formerly known as MashupOS) has morphed again and is now part of a research project known as ServiceOS. The focus of Gazelle was on security/protection; ServiceOS fleshout out the vision for what resource access and management would like like for Web apps. Two of Microsoft researchers behind the project — Helen Wang and Alex Moschuk –published late last year a white paper explaining the evolution of their new ServiceOS vision.
From an introduction to that paper: "Existing browsers rely on resource access control and sharing mechanisms built into traditional OSes. Unfortunately, such mechanisms are ill-suited for many complex web services, such as those embedding mashups of other web services." The ServiceOS platform "tightly integrates a multi-principal browsing architecture with the underlying OS," the authors explain.