I like it. It works for when the lyrics is there.

Only downside is it doesn't have the lyrics for all songs.

E.g. Full Fledge by icecoldbishop

thanks for adding it to firefox but the extension has stopped working on both chrome and firefox since this morning
update: started working again, thankyou for this
update 2: not working again sometimes, will show lyrics of previous song, i guess it needs more work and be more consistent