Extension:Popups works wonderfully on the wiki I contribute to, aside for one visual quirk. Sometimes, for taller portraits, it tends to cut off a little bit of the top and the bottom. Is there a way to set the y offset to zero for mwe-popups-is-tall class images to avoid portrait decapitation and to have it only crop the bottom of the image?
Topic on Extension talk:Popups
I believe this is because of a known issue related to portrait images, see phab:T255549.