Welcome to Thunderbird Add-ons.
Add extra features and styles to make Thunderbird your own.Close
TT Deep Dark Rated 5 out of 5 stars
Best Design for Thunderbird! Too bad it is not working with the new updated version, I wished I could go back to 16, after using this for a long time!, Frustrating!!!This review is for a previous version of the add-on (3.0.6).