Rated 5 out of 5 stars

The two icons are a great addition and are very useful.
Maybe is better change the background color instead of the lines because is very hard to see the difference in my opinion.
Thanks.

This review is for a previous version of the add-on (1.2.6). 

Rated 5 out of 5 stars

About:compartments no longer exists.
Please update.
EDIT: Firefox 26 beta3

This review is for a previous version of the add-on (0.0.0.5m.1-signed). 

about:compartments is working in Firefox 25.