Firefox 4 was released recently with new features and improvements. Firefox 4 also had a refreshing new look but it was very similar to Opera browser theme. If you still did not like the Firefox 4 theme, you can just spice up your Firefox with some cool and refreshing themes including the most popular Mac theme. Here is a list of some awesome themes for Firefox 4.
1. Bloomind FT GraphiteGlow is a theme that has been created to transform the look of Firefox 4 for Windows users. It has been specially designed for Seven, but rendering is relatively accurate on XP.
2. FXChrome: FXChrome is another neat theme for Firefox 4 which is based on Chrome. If you love the interface of Chrome, you should be trying out this theme.
3. MacOSX Theme: It is based on original Firefox 4 Mac OSX theme and works on all versions of Firefox. It brings in the look and feel of MacOSX.
4. Phoenix Simple: Phoenix Simple is a very small theme. It only replaces the Back, Forward, Stop and Reload buttons and restyles the button surrounds and a few other tweaks.
You can also try out the Metro theme for Firefox (the theme currently not supported on Firefox 4).