tsoncrant

Have corrected this issue with the last entry in the attached userchrome file [userchrome.txt](https://github.com/conema/monterail-dark/files/9598781/userchrome.txt)

1. To allow Thunderbird to detect userchrome.css, you need to use the Config Editor (Settings | General, button at the bottom) to set the preference: toolkit.legacyUserProfileCustomizations.stylesheets to True. Just type...

Fixed with attached userchrome [userchrome.txt](https://github.com/conema/monterail-dark/files/9598792/userchrome.txt)