Rated 5 out of 5 stars

Από τον/την Paul στις Ιαν. 17, 2019 · μόνιμος σύνδεσμος

@Peter Landstreet

Go to the Add-ons page in Thunderbird. Click on the "gear wheel" icon at the the top of the page and select "Install Add-on from file...".

Hopefully it's straight forward from there.