The plug-in is simple to use. Just install and enter a password from the plug-in setting menu and save it. Each time you start the browser will need this password.
If the password does not match the browser immediately closes. You can change your password in the plug-in settings.
NOTE: Do not lose or forget your password. There is no option to recover your password. You’ll have to reinstall your browser. You can install Simple Startup Password at Chrome extension gallery here.