From eWeek’s story on the new Firefox 1.5 beta:
With the extension problem out of the way, though, no matter whether you run Firefox 1.5 on a Windows, Linux or Mac OS system, you won’t be able to tell the difference between this beta and the currently shipping Firefox 1.06.
This is a far cry from Microsoft’s Internet Explorer 7 beta, which will only be available in its fully secured version on the forthcoming Vista operating system. IE 7’s improvements are largely surface features such as tabbed browsing.
Oren Sreebny 