Enhancement: add label to mouse-over tooltip

[dhowe]

Excellent addon. Not sure how much work this would require, but would be even more excellent if the label could be displayed on mouse-over, something like "Firefox (Label)", rather than just "Firefox":

[jf]

Good idea; I'm not so sure how much functionality is exposed to the plugin system right now, though, to be able to do this. Needs some research.... Have u seen any other plugin (so I can reference code) that's been able to do this?