Protect, Lock, Freeze ? Rated 5 out of 5 stars

This is a great add-on, one of my 'Musts'
Most of the features are obvious exempt the protect/lock tab features. Hence it would be nice to add it to the description, so we don't need to go download the PDF help file.
Locked: prevent from closing the tab
Protected: prevent from navigating away
Freeze: both the above

This review is for a previous version of the add-on (0.3.8.1).