this.add("externalProtocol", "@mozilla.org/uriloader/external-protocol-service;1", "nsIExternalProtocolService");
this.add("favicon", "@mozilla.org/browser/favicon-service;1", "nsIFaviconService");
this.add("file:", this.PROTOCOL + "file", "nsIFileProtocolHandler");
this.add("focus", "@mozilla.org/focus-manager;1", "nsIFocusManager");
this.add("externalProtocol", "@mozilla.org/uriloader/external-protocol-service;1", "nsIExternalProtocolService");
this.add("favicon", "@mozilla.org/browser/favicon-service;1", "nsIFaviconService");
this.add("file:", this.PROTOCOL + "file", "nsIFileProtocolHandler");
this.add("focus", "@mozilla.org/focus-manager;1", "nsIFocusManager");