Rated 2 out of 5 stars

per gracefool el feb. 6, 2012 ·

Customize Titlebar has more options https://addons.mozilla.org/en-US/firefox/addon/customize-titlebar/

This review is for a previous version of the add-on (2.0.0.1-signed.1-signed). 

per Jelle Geerts (desenvolupador) a feb. 7, 2012 ·

That's why this add-on isn't called Customize Titlebar but Hostname in Titlebar.