Rated 5 out of 5 stars

Love the addon.

However, I have a couple questions on privacy.

1) Are pictures in an https page requested with https?

2) Are pictures in private browsing mode handled any differently?

This review is for a previous version of the add-on (2.6.1-signed). 

1. Pictures are often but not always requested using the same protocol as the web site's thumbnail for the most part. On certain sites TZP uses http even when the original thumbnail is https.

2. TZP honors the Private Browsing setting of the current window. For example, it doesn't add to history in Private Browsing mode and when an image is saved via 's' it tells Firefox that the image is private (which may affect how Firefox handles it).