If an artist or song name contains a ", it's not parsed completely
the string is cut off just before the first instance of a quotation mark.
As in this song:
Epitaph - Including "March for No Reason" and "Tomorrow and Tomorrow"
gets displayed as:
Epitaph (Including ) - King Crimson

This is because of how this extension extracts both strings from d-bus

  var titleBlock = data.substring(data.indexOf("xesam:title"));
  var title = titleBlock.split("\"")[2]

  var artistBlock = data.substring(data.indexOf("xesam:artist"));
  var artist = artistBlock.split("\"")[2]

As you can see, it gets artist and title from a string(substring?) surrounded by quotation marks, so if either string have a quotation mark somewhere it gets cut.

I have a fix to this for a week now (and few others).
I will submit a pull request right away.