function FirefoxPlugin() {
  if ((typeof window.sidebar == "object") && (typeof window.sidebar.addSearchEngine == "function")){
    window.sidebar.addSearchEngine( "http://www.link-archiv.info/plugin/search.src",
                                    "http://www.link-archiv.info/images/bmark.gif",
                                    "link-archiv.info search",
                                    "link-archiv.info.com");
  }
}