Rated 5 out of 5 stars
I find this addon super helpful alongside my Nextcloud Carddav setup. Only thing I find annoying, when you create an email from a category it forces you to BLIND CC everyone due to some German Data Protection law. I am in --CANADA-- This option should be location specific.
That's my only complaint.
*Edit. Just found out this can be achieved using the contact sidebar and selecting the category... So.. 5 star for me.