Q:

Notifications in browser tab

A very nice feature for Stack Overflow (and other Stack Exchange sites) would be to indicate the number of notifications (if any) in the browser tab like seen on Facebook:

Of course that would require automatic update if content has changed. Some kind of 'push-notification' which would be a nice feature as well.

A:

You might like the StackAlert extension for Google Chrome, which does this in a little icon off to the edge of your screen:

