Rated 4 out of 5 stars

Quite good, for a beta. glitches I found: when I mark a thumbnail for deletion or pinning, I need to reload the page for the change to take effect. Also, the usual Context Menu is disabled. Finally, a feature request: I don't need the search box; please include an option that lets me remove it.

This review is for a previous version of the add-on (0.5a5.4.3.1-signed).