Great! Plus a suggestion Rated 5 out of 5 stars

I installed v. 6.7. So far so good. It allowed me to drop a few extensions and get what I want: favicons and colours for secure sites.

I also notice on your screenshot that you have a dark-coloured URL bar for secure sites. Is it a Unix-only feature? I don't see it with Windows 7.

In the same vein, there is one idea I really like: a light yellow address bar for secure sites. Is this a possibility for a future version?

This review is for a previous version of the add-on (5.5.1-signed). 

Great! Plus a suggestion

It's a local css theme that I use for the urlbar security levels. If you wish to email me with your system and Fx version, I will be happy to share. I am on Windows 7 Fx Aurora 17.0a2