Rated 1 out of 5 stars

On Firefox – works great, literally the best, but on Thunderbird – quite the opposite. Extension only works after installation when Thunderbird is not restarted. The first restart after the installation causes selected theme not to be applied in messages. Fix this, please. It used to work perfectly on Thunderbird too. I am currently using Thunderbird Beta 127.0b3 (64-bit).