Rated 2 out of 5 stars
Wanted to keep this theme, nice layout, but it does not work in Thunderbird version 78.4.0.
1. The folder icons are not showing unless that folder is highlighted by clicking it
2. New emails, the text color is all white until that email is clicked, then it changes to black and becomes visible.
I have been seeing these 2 problems in many of these themes, so your not the only one impacted.
The newest update of Thunderbird has made all these themes incompatible and the above issues are symptoms of that incompatibility. Why? - I tested the default themes that came with Thunderbird and they work fine.