LeerenTabNutzen - Ersatz für Eval möglich ?

(function() {

  if (!window.gBrowser)
    return;
   
  PlacesUIUtils._openTabset = function PUIU__openTabset(aItemsToOpen, aEvent, aWindow) {
    if (!aItemsToOpen.length) {
      return;
    }
    let browserWindow =
      aWindow &&
        aWindow.document.documentElement.getAttribute("windowtype") == "navigator:browser"
      ? aWindow
      : BrowserWindowTracker.getTopWindow();
    var urls = [];
    let skipMarking =
      browserWindow && PrivateBrowsingUtils.isWindowPrivate(browserWindow);
    for (let item of aItemsToOpen) {
      urls.push(item.uri);
      if (skipMarking) {
        continue;
      }
      if (item.isBookmark) {
        this.markPageAsFollowedBookmark(item.uri);
      } else {
        this.markPageAsTyped(item.uri);
      }
    }
    var where = browserWindow
      ? browserWindow.whereToOpenLink(aEvent, false, true)
      : "window";
    if (where == "window") {
      var uriList = PlacesUtils.toISupportsString(urls.join("|"));
      var args = Cc["@mozilla.org/array;1"].createInstance(Ci.nsIMutableArray);
      args.appendElement(uriList);
      browserWindow = Services.ww.openWindow(
        aWindow,
        AppConstants.BROWSER_CHROME_URL,
        null,
        "chrome,dialog=no,all",
        args
      );
      return;
    }
    var loadInBackground = where == "tabshifted";
    browserWindow.gBrowser.loadTabs(urls, {
      inBackground: loadInBackground,
      replace: isBlankPageURL(browserWindow.gBrowser.currentURI.spec),
      triggeringPrincipal: Services.scriptSecurityManager.getSystemPrincipal(),
    });
  }   
   
})();