Two disgruntled tech whizzes, Jim Clark and Marc Andreessen, join forces to exact revenge on the companies that wronged them, building a browser so fast and powerful that it wipes their competitors off the face of the web. In private, they call it a “Mosaic Killer,” but in public, it’s called “Netscape Navigator.” The launch of their new browser will mark the beginning of a new era in computing, the birth of a new economy based on the web, and the moment Microsoft put a target on their backs.