Rated 3 out of 5 stars

per Firefox user 35e0b6 el nov. 21, 2016 ·

dont work on any site right now, any clue?

This review is for a previous version of the add-on (4.0). 

per David Adler (desenvolupador) a gen. 5, 2017 ·

Make sure the overall "Enable" checkbox is turned on in the Thumbnail Zoom Plus preferences, and that all the checkboxes are on in the "Site Checkboxes" tab.