Add a QuickInfo Button to show the current song title/artist/image within a small dropdown window. As used for e.g. [Ghostery](https://addons.mozilla.org/de/firefox/addon/ghostery/):  Or the [Youtube Player](https://addons.mozilla.org/de/firefox/addon/media-player/): 
Add a QuickInfo Button to show the current song title/artist/image within a small dropdown window.
As used for e.g. Ghostery:
Or the Youtube Player: