Rated 4 out of 5 stars

I really like this a lot, although strangely, not for the "thumbnail zoom" capability. Instead, I like to use it with Google image search - I can mouse-over an image and read the icon and see if the image is still available "live", or if it's being pulled in from a Google cache.

Which leads me to the one feature that I wish TZP had: I'd like to be able to turn off the image preview entirely and simply get a 'hover-help' that tells me the dimensions of the image. Maybe there could be options to tell me the size of the image in KB, and the URL / image name, too.

(If you've ever used Google to search for high-resolution images, you'll appreciate what I'm asking for).

This review is for a previous version of the add-on (2.4.3.1-signed). 

I've never heard of it being used like that... interesting.

If you don't want a pop-up, set Thumbnail Zoom Plus preference "Default Zoom (%)" very small (eg 1), so the pop-up will be small.