Perfect Addon! Rated 5 out of 5 stars

This addon is great and I consider it as a must-have addon for Firefox.

btw, one suggestion: Any plans to add support for ASOS.com?

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

asos.com is in 2.4beta3

I just added support for ASOS.com, now available in 2.4beta3. https://addons.mozilla.org/en-US/firefox/addon/thumbnail-zoom-plus/versions/