This theme is a modification from the fantastic theme Charamel. Many thanks to Alex W. for inspiration, support and for giving me permissions to use and modify his icons, artwork and code.
Silvermel is offered as bundle - it installs "Silvermel and Charamel XT" extension to support font uppercase and letter spacing for labels on Firefox's sidebars, Thunderbird's folder pane, Thunderbird's Address Book and Thunderbird's Account Configuration window. The extension also colorizes the url bar according to security state. The extension only applies if Silvermel is the used theme.
AERO OR NOT AERO! If you are using Windows 7 and want to disable the "aero look" from Silvermel, you can now do it switching the preference "extensions.silvermelxt.aeroEnabled" to false at the Preferences Editor: http://kb.mozillazine.org/About:config