Nice ... But ... Rated 4 out of 5 stars

About 1080p option, could you use the cache of FF after I played the video at 1080p ? thanks for this addon =)

This review is for a previous version of the add-on (2.1.6.1-signed). 

Youtube removed the option of downloading 1080p and 480p qualities - working on a fix though.

Sorry for the inconvenience.