Rated 4 out of 5 stars

Very nice add-on. However it no longer centers images when shown apart. And when showing them all in one page the images are reduced to thumbnails. It also no longer allows custom background colours but that isn't such a big deal.
I think the thumbs thing has something to do with incorrect iframe size but don't know where to look to fix it.

This review is for a previous version of the add-on (0.4.1.1-signed).