Rated 5 out of 5 stars

Works great. Also works on Linux unlike "Thumbnail Zoom". To the developer, you may want to make the options for "thumb" and "other" a little more clear as to what they do in the options menu. As you know I was under the impression there was no way I could turn the preview off for links.

This review is for a previous version of the add-on (2.3.1-signed). 

To disable previews for links (as opposed to thumb images) turn off the "Others" checkbox in Thumbnail Zoom Plus' Preferences or toolbar menu. Email me at firefox.add.on@davidadler.name if you'd like to discuss more.