The new version of Firefox 1.5 Beta1 is released with new features like automated updates, faster browser navigation, clearing private data along with many more.
When I tried with the new beta found that it really rocks. During the first startup of the browser reported imcompatible themes and plugins that I had for earlier version
(1.0.6). It also asked and allowed me to upgrade to the new ones which are available and those they are not left as un-supported (for example I use outlook 2003 theme, advaced tabbed preferences and IE view). I found a minor bug that in themes and plugins it still reports the browser version as 1.4 as opposed to 1.5 BETA; but thats negligible in beta releases. The install also went clean on Windows Vista build 5112 and it also imported the IE 7 bookmarks and history.
Online reviews about Firefox 1.5 Beta1: