I just installed Firefox today due to slowness I was experiencing with IE8 on my XP system; 1 GB of RAM with a 1.7 GHz 2 core processor wasn't cutting it for IE8 for some reason... I also only have 128 MB of video memory, so that might have something to do with it.
I noticed the version number; I think I last installed a few weeks ago with the previous version. Thanks for the info!