How to customize or silence Chromebook notifications

You already get too many notifications. Your phone, tablet, and maybe even your smartwatch are constantly buzzing with emails or news alerts. PCs are the last refuge for the notification-weary--but not for long. Google's Chrome browser is getting ready to join the chorus, as web sites and many web-friendly apps are gaining the ability to send you push notifications. Fortunately, there's a way to tame the noise on your Chromebook. With just a few tweaks, you can take complete control over the ale...