Method isFirefox

src/openlayers/mapping/WebMap.js:5396–5399

* @private * @function WebMap.prototype.isFirefox * @description 判断当前浏览器是否为 firefox * @returns {boolean}

()

   * @returns {boolean}
   */
  isFirefox() {
    let userAgent = navigator.userAgent;
    return userAgent.indexOf('Firefox') > -1;
  }

  /**
   * @private