Rated 5 out of 5 stars

Από τον/την eroock στις Οκτ. 7, 2019 · μόνιμος σύνδεσμος

Looks nice. For anyone wondering why the background in emails did not change to dark, this has to be done manually via following setting in Thunderbird:
Tools : Options : Display : Colors
(make sure to set "Override the colors..." to "Always")