Rated 5 out of 5 stars

by Benia on Dec. 13, 2018 ·

https://addons.thunderbird.net/en-US/thunderbird/addon/minimizetotray-reanimated/

Rated 5 out of 5 stars

by Benia on Dec. 13, 2018 ·

Работающая замена: https://github.com/ysard/mintrayr/releases/tag/1.4.7dev
Прочтите дисклеймер, возможны осложнения.