content composer jar:composer.jar!/content/composer/
locale composer en-US jar:en-US.jar!/locale/en-US/composer/
locale branding en-US jar:en-US.jar!/locale/en-US/branding/
skin   composer classic/1.0 jar:composer.jar!/skin/classic/composer/
style  chrome://global/content/customizeToolbar.xul    chrome://global/skin/
style  chrome://global/content/customizeToolbar.xul    chrome://composer/skin/composer.css