content scuttle             chrome/scuttle/content/
locale  scuttle en-GB       chrome/scuttle/locale/en-GB/
locale  scuttle de-DE       chrome/scuttle/locale/de-DE/
skin    scuttle classic/1.0 chrome/scuttle/skin/classic/

overlay chrome://browser/content/browser.xul            chrome://scuttle/content/scuttle.xul
style   chrome://global/content/customizeToolbar.xul    chrome://scuttle/skin/scuttle.css