Webrunner was a Prism reimplementation and enhancement.
It was a platform developed by Salsita Software using the same technology that underlies the Firefox browser. It maked it easy to turn web apps into standalone desktop applications that:
better engage users by integrating more closely into their desktop environment. are more robust and stable. provide enhanced security because they are isolated from cookies and scripts that come from other websites. run on Windows, Macintosh and Linux without needing to worry about the quirks and idiosyncracies of various browser platforms.