Ars Technica reports that Microsoft has opened up about "Gazelle," a new browser prototype of theirs that is modeled after the underlying concepts of operating system design. "A research team led by Microsoft's Helen Wang recently published a report about an experimental browser prototype called 'Gazelle' that uses processes to isolate page content elements originating from different domains. It builds on the concept of multiprocess browsing but uses more fine-grained isolation to expand on the security advantages that are already delivered by existing multiprocess browsing models. But is it an operating system, Microsoft Research's analogue to Google's Chrome OS? Not quite."