笔者的环境：
OS: Ubuntu Linux
Browser: Chrome, Firefox
每次希望启动chrome浏览器，系统都会报错：
1 browser-sync start -s --directory -f **/* --browser chrome
Couldn't open browser (if you are using BrowserSync in a headless environment, you might want to set the open option to false)
正确的启动方式应为：
browser-sync start -s --directory -f **/* --browser google-chrome