Show “album art” and song information when hovering the mouse over the currently playing tab: When the cursor moves to the currently playing tab or icon on the toolbar, the extension will show a small pop-up with the album art, song title, artist, from the web music service. Simple: just read metadata from the tab (if available) or gently call the API. Why it is not popular: because getting metadata from a web tab is sometimes difficult (service is closed or protected) and many simple addons do not highlight this “hover tab” part.
