Simple but very useful Rated 5 out of 5 stars

Nice addon.

This review is for a previous version of the add-on (1.0.1). 

Yes, it does work on Windows. Look at the third image on Add-ons page how to make it visible!
https://static-ssl-cdn.addons.mozilla.net/img/uploads/previews/full/67/67458.png

Tested up to FF16.0a1.

*****

Thanks