* verifying the signature of the bypass list within the database.
   *
   * If the signature in the database is invalid, the database will be wiped
   * and the stored dump will be used, until the settings next update.
   *
   * Note that this may cause a network check of the certificate, but that
   * should generally be quick.
   *
   * @param {boolean} [firstTime]
   *   Internal boolean to indicate if this is the first time check or not.
   * @returns {Array}
   *   An array of objects in the database, or an empty array if none
   *   could be obtained.
   */
  async #getFallbackDomains(firstTime = true) {
    let result = [];
    try {
      result = await this.#fallbackDomains.get({
        verifySignature: true,
      });
    } catch (ex) {
      if (
        ex instanceof lazy.RemoteSettingsClient.InvalidSignatureError &&
        firstTime
      ) {
        // The local database is invalid, try and reset it.
        await this.#fallbackDomains.db.clear();
        // Now call this again.
        return this.#getFallbackDomains(false);
      }
      // Don't throw an error just log it, just continue with no data, and hopefully
      // a sync will fix things later on.
      console.error(ex);
    }
    return result;
  }
}
PK