Rated 4 out of 5 stars

- The ability to disable per site with version 3.1 cured a big pain. But you still can't exclude a site from the tool bar menu button; you have to open the extensions page, find this extension, open the options, find the corresponding section and type the name of the address of the site for each website! It is so cumbersome!
- Still the keyboard loses focus if you forget your mouse on a small image.
- If the thumbnail is the original image itself, and it is not loaded fully, TZP shows only the loaded part of the image (TZP assumes that the browser cache is always trustworty and uses the erroneous image data from there.).
- Has a very high miss rate; especially for large images.

Example:

Goto this URL: http://electronics.stackexchange.com/q/141739/5542

There are three images:
A) http://i.stack.imgur.com/FPxoi.jpg
1.228px × 694px (scaled to 630px × 356px)
B) http://i.stack.imgur.com/2347i.jpg
362px × 234px
C) http://i.stack.imgur.com/3lDxp.jpg
1.293px × 415px (scaled to 630px × 202px)

TZP opens images (2) and (3), but ignores the image (1).

This review is for a previous version of the add-on (3.2.1-signed).  This user has a previous review of this add-on.