Last.fm Scrobbler for YouTube
Simply scrobble watched YouTube videos into Last.fm with this extension. Automatic scrobbling takes place 4 minutes after a music is played or at the end of the track if the track is less than 4 minutes. You can also manually scrobble the currently played song by pressing the count down label. Using this extension you can also like or dislike YouTube songs without the need to open the actual Last.fm website. Note that to prevent unwanted scrobbling, the extension pauses the count down when the song is paused. Also, the scrobbling label, as well as the like button, only appear if you are on the "Music" or "Entertainment" categories.