content-packs.jar:
*     content/content-packs/contents.rdf                (content/contents.rdf)
      content/content-packs/prefOverlay.xul             (content/prefOverlay.xul)
      content/content-packs/pref-contentpacks.xul       (content/pref-contentpacks.xul)

en-US.jar:
      locale/en-US/content-packs/prefOverlay.dtd        (locale/en-US/prefOverlay.dtd)
      locale/en-US/content-packs/pref-contentpacks.dtd  (locale/en-US/pref-contentpacks.dtd)
*     locale/en-US/content-packs/contents.rdf           (locale/en-US/contents.rdf)