Rated 2 out of 5 stars

This addOn looks set to satisfy a need. Yet, on Thunderbird 115.1.1, on Windows 10, using dark mode (in Windows and Thunderbird), the addOn's preferences are black-on-black, rendering the addOn unusable.

This review is for a previous version of the add-on (1.5). 

Hello,
dark Mode should work now. See Screenshot.
Kindly let me know if it works for you now.
Kind Regards!