Convenient, but anything truly important requires multiple forms of notification anyway since you might not be in front of your browser. I usually set sticky reminders (e.g. order more contacts) to send an email, and do-it-now reminders (e.g. ZeroPage Homebrew is live on Twitch now!) to both email and SMS. Browser notifications are pretty redundant after that, but nothing's wrong with having multiple fail-safes if you're really paranoid about forgetting something.
