od sc7390 (Vývojář) v Led. 26, 2023 · trvalý odkaz

So if you would like it to work, could you please provide more info about what you are encountering, what version of Thunderbird you are using, etc?

Also, did you install the macOS app that is required to communicate between the add on and Things? Information at https://github.com/snchong/thunderthings (which is linked to from the add on page).