Google on Tuesday released the beta version of its new open-source Chrome Web browser. The 7-Mbyte download is available now via http://www.google.com/chrome/ in 122 countries and 43 languages. It will run on Windows-based computers running XP or Vista, but Mac and Linux versions are still in the works. News over Chrome broke Monday after Google inadvertently published a Web comic book with details about the browser. "What we wanted to build was not so much a traditional content viewer but more of a window manager for web pages and applications," Ben Goodger, a Google software engineer, said during a Tuesday press conference. Will Chrome encroach on Internet Explorer territory? Google officials took pains to not even mention Microsoft's name during Tuesday's press event, though Google co-founder Sergey Brin did acknowledge when questioned that if "IE9 was much, much better as a consequence of Chrome, we would consider that a success."