Mozilla Firefox 0.9 has been released for Windows, with availability for Linux and OS X as well. Users are encouraged to upgrade from version 0.8. While some reports indicate that version 0.9 is buggy, others have not experienced these issues and note improved page loading speeds and a new theme. The browser appears stable for many, particularly on Linux systems. Additionally, a web developer extension is highlighted as a useful tool for developers. Despite the improvements in Firefox, some users still prefer Safari for its speed and intuitive keyboard shortcuts, especially on OS X.