Rated 5 out of 5 stars

per Marky Mark DE el nov. 26, 2012 ·

some Themes don't work with the current TB 17 in this case you can try "Titlebar Tabs Cleaner"
https://addons.mozilla.org/en-us/thunderbird/addon/titlebar-cleaner/

This review is for a previous version of the add-on (3.0.6).