How to Customize Firefox 4 Appearance ? Apart from using Firefox 4 Themes, here is nice Add-on to fully customize the Firefox 4 user interface by styling App Menu Button, input Buttons,all the icons,and Tab Color.
Stratiform is an add-on for Firefox 4, allows the users to tweak Firefox 4 appearance settings to the maximum level. The extension also customizes the theme, allowing users to enable toolbar styles, which suit their tastes. Tab bar, Add-on bar and Address Bar and Navigation Buttons aslo easily customizable using Stratiform.
Four Group of Customization available : Toolbar, Tab Bar, Add-on Bar and App Menu Button.
Change the Firefox 4 App Menu Button using Stratiform
Change Tab Size,Tab Color,Nav Buttons :