lib/utils/openBrowser.js/openBrowser
module.exports = function openBrowser(url) {
  let browser = process.env.BROWSER;
  if (browser === 'none' || isDockerContainer()) {
    return BbPromise.resolve(displayManualOpenMessage(url));
  }
  if (process.platform === 'darwin' && browser === 'open') {
    browser = undefined;
  }
  const options = { wait: false, app: browser };
  return opn(url, options).catch(err => displayManualOpenMessage(url, err));
};