nodejsはデフォルトのブラウザを開きます.

//       
const openDefaultBrowser = function (url) {
  var exec = require('child_process').exec;
  console.log(process.platform)
  switch (process.platform) {
    case "darwin":
      exec('open ' + url);
      break;
    case "win32":
      exec('start ' + url);
      break;
    default:
      exec('xdg-open', [url]);
  }
}
openDefaultBrowser('https://www.baidu.com')