function FirefoxPlugin() {
  if ((typeof window.sidebar == "object") && (typeof window.sidebar.addSearchEngine == "function")){
    window.sidebar.addSearchEngine( "http://www.bookmarkz.org/de/plugin/search.src",
                                    "http://www.bookmarkz.org/de/images/bmark.gif",
                                    "bookmarkz.org search",
                                    "bookmarkz.org/de");
  }
}