Rated 5 out of 5 stars

Από τον/την Askalick στις Νοέμ. 4, 2019 · μόνιμος σύνδεσμος

This is one of the best add-ons in Thunderbird. It makes it possible to include an image as part of a signature. Not just possible, but easy. Plus the option to choose whether or not to enable it in a particular email.

So it is really annoying that Thunderbird has not approved it for use in the latest version 68. I have had to find and download the previous version 60.9 and replace the installation for it to continue working.
My signature is vital for my voluntary work, so the only other alternative is to use webmail which I really hate.