Rated 4 out of 5 stars

Seems precisely what I was looking for but asking "... full, unrestricted access to Thunderbird, and your computer" is a bit too much risk for my taste. I give the average 4 stars evaluation only for the idea.

I would like to see the TB API be more specific and or better organized to allow the functionality of this plugin without full access. I wait with using this add-on until then. I would like to know if there is a way to influence this, without being a TB developer.

TB 91.4.1 under Linux

This review is for a previous version of the add-on (11.1). 

Thank you for your kind review! Thunderbird's still evolving modern WebExtension API should eventually provide all needed functionality for this and many other add-ons. In the meantime one has to trust the thorough review each legacy add-on has to pass.

https://support.mozilla.org/en-US/kb/permission-request-messages-thunderbird-extensions#w_have-full-unrestricted-access-to-thunderbird-and-your-computer