After the commit #876559fd908868842a9f3df9ec852c1f21d0bad9 the change at the file dark.css made the main menu (from the burger button) of Thunderbird to have white text, and unreadable, because it has light grey background. When I reverted the change, the color became again black.
After the commit #876559fd908868842a9f3df9ec852c1f21d0bad9 the change at the file dark.css made the main menu (from the burger button) of Thunderbird to have white text, and unreadable, because it has light grey background. When I reverted the change, the color became again black.
Thunderbird v.52.1.1 on Linux mint