Рейтинг 5 из 5 звёзд

Thank you.
----------------
Dear developer,

This add-on is great.
I want you to support Thunderbird Ver100.0b4 or later.
Thank you.

Это отзыв для предыдущей версии этого дополнения (3.3). 

Hello,
It should work fine in the current Beta and also Alpha 101.
But Thunderbird is a bit broken sometimes, you can try to uninstall it, restart Thunderbird and install it back.
Alternatively, there is another (probably even better) dark mode addon - Dark Reader which may work.

Best Regards,
Juraj Mäsiar