The latest release - Firefox 2.0 - can be downloaded here. Yes...it is better! While IE 7 is a major improvement for Microsoft, Firefox sets the standard. As with all new Firefox releases some extensions don't work. I am not worried because the extension developers are always fast to get them up and running. The main reason I use Firefox for 95% of my browsing is an security. The code is open source and when vulnerabilities are found they fix them fast! It was easy and fast install with no loss off bookmarks. On a scale of 10 Firefox hits the top. I will give IE 7 a 7.5 - Mainly just for improvements, and adding tabs.
H/T to HDW