oleh David Adler (Pengembang) pada Feb. 23, 2015 · tautan permanen

It's working for me: I see pop-ups when I enter search text into the "Search Facebook" field at the top of the page, and hover thumbs in the drop-down list.

I can investigate if you can tell me more specifically how to reproduce the problem; you can email me at firefox.add.on@davidadler.name