Rated 1 out of 5 stars

by Firefox user 85f008 on Jan. 4, 2018 ·

FF 57 has been out for over 1 month. Developer has not indicated here or on his website that he has any intention of making it compatible with 57.

THIS ADD-ON IS DEAD.

Either re-install 56 or learn to live without it or find an alternative, even if it's not as good. Those are the only choices.