Rated 5 out of 5 stars

Από τον/την MrThompson83 στις Νοέμ. 6, 2020 · μόνιμος σύνδεσμος

Works like a charm. Just installed the add-on and activated "Minimize to sys tray" option in the Thunderbird settings.
Now, when I click on on the X, Thunderbird is minimized into the tray.
Perfect!