Really , the user interface of Firefox 3 rocks. Text boxes and other form fields have a nice smooth corners and select menu item is similar to the one you find in gnome 🙂 .
The old form elements are shown in this image.
Click image for a clear view
New here comes the new interface of the same webpage in Firefox 3 🙂
Click image for a clear view
Wow, looks like any web developer can make web pages which will look really cool in Firefox 3.