messenger.jar:
+   content/messenger/msgOfflineOverlay.xul                (content/msgOfflineOverlay.xul)
+   content/messenger/mail-offline.js                      (content/mail-offline.js)
    content/messenger-offline/contents.rdf                 (content/contents.rdf)
    content/messenger/pref-offline.xul                     (content/pref-offline.xul)
    content/messenger/pref-offlineOverlay.xul              (content/pref-offlineOverlay.xul)
    
en-US.jar:
+   locale/en-US/messenger/offline.properties              (locale/offline.properties)
    locale/en-US/messenger/offline.dtd                     (locale/offline.dtd)
+   locale/en-US/messenger/pref-offline.dtd                (locale/pref-offline.dtd)