Rated 5 out of 5 stars

per bsdaddict el feb. 24, 2021 ·

5-star, but broken again... With addon enabled the header area doesn't show at all, with addon disabled header area with 3 lines appears.

This review is for a previous version of the add-on (2.18). 

per Dillinger (desenvolupador) a feb. 24, 2021 ·

No headers at all? You possibly clicked "Hide Headers".
Right click a message or the message list and select "Show Headers" near the bottom.