I just installed the recent beta 4 release of Firefox 3 (Firefox Portable, to be exact, thus making it run alongside my trusty Firefox 2). Firefox 3 is blazing fast, but this may be due to the fact that I've got almost no add-ons installed. My Firefox 2 has to carry the burden of 27 active extensions that may or may not slow down the whole applicaton, who knows. All in all, Firefox 3 seems to be very stable already, but I need my add-ons for web development and so on. That's why I've been looking for other things to do with the new beta. When I found out that Mozilla Labs released a new version of Prism, their stand-alone XULRunner applicication slash Site Specific Browser. If you install Prism 0.2 as add-on to Firefox 3, it allows you to create and export new applicatons from within the browser. The new apps then use the browser's rendering enginge, it seems (I'm not exactly sure how it works). Yet, again, the resulting app feels considerably faster than the old Prism. I'm using an installation of tt-rss on my server as web based feed reader. Now that it's running as a Prism app, it seems to respond so much faster than before - which reduces the amount of time I need to read all my feeds. Great!