Rated 5 out of 5 stars
Got rid of the latest Firefox beta release for the sole purpose of being able to have your program "do its thing" as intended. Thanks for a great add-on.This review is for a previous version of the add-on (2.60). This user has a previous review of this add-on.
I have updated the add-on to work in Firefox 51. Can you please try now? :)