Gmail has this cool thing where when you get a new email, a notification will pop up on your screen.
The W3C spec:
What’s actually implemented in Chrome:
Also, I found this ‘experimental’ Firefox addon to add support for them:
It is supported in Firefox: https://developer.mozilla.org/en-US/docs/WebAPI/Using_Web_Notifications
I think it would be cool if one of these happened whenever the number on the notification icon changes - i.e. before the email notification gets sent out. This lets me get notified ‘more instantly’ and even avoid the notification email if I want to go check out what it was.
In fact, as I was writing this, the number went from 0 to 1. It really would be nice to have these popups with their short descriptions of what it is