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