Rated 4 out of 5 stars
I saw in a previous review by "Pref" that a user can edit the CSS of this theme to change it, but I couldn't find chrome/MonterailOverlay/css/root.css on Windows 10, is it in a different place? :/
Edit: Great, thank you. But there isn't a class for unread messages, unless I'm missing it?
You can find the root.css file into the theme xpi/zip: "/content/skin/root.css". The xpi/zip is located in "\AppData\Roaming\Thunderbird\Profiles\<random numbers and letters>.default-release\extensions" and can be opened with any zip tool. If you need more support, feel free to open an issue on github: https://github.com/conema/monterail-fulldark/issues