f (Persistence.getItem(TOGGLE_STATE_INDEX_KEY) === null) {
        logger.debug(`First review, setting Persistence to ${0}`);
        Persistence.setItem(TOGGLE_STATE_INDEX_KEY, 0);
      } else {
        logger.debug("Persistence is available. Not the first review, so nothing has to be done.");
      }
    } else {
      logger.debug("Persistence is not available! Unable to init Persistence");
    }

    // visual interface for whether images should be blurred or not
    infoCircleSettings.appendChild(sett