overlay	chrome://browser/content/browser.xul	chrome://gbutts/content/gbuttsOverlay.xul
overlay	chrome://navigator/content/navigator.xul	chrome://gbutts/content/gbuttsOverlay.xul
content	gbutts	jar:chrome/gbutts.jar!/content/

skin	gbutts	classic/1.0	jar:chrome/gbutts.jar!/skin/