Here’s one of the many small improvements in Firefox 3 Beta 1 that I really like:

Browsing a local folder in Firefox 2:

Browsing a local folder in Firefox 3 Beta 1:

This makes it so much easier to navigate your local files. And it’s not just eye candy — you can now sort the file listing on Name, Size, and Last Modified!

For a more complete coverage of Firefox 3 Beta, this article by Ars Technica is a good start.