Rated 3 out of 5 stars

very useful but unfortunately very buggy add-on: its preferences don't get saved and, more importantly, when the addon is active the message window stop resizing when in vertical view layout so the message get cut.
A real pity because there are no other similar extensions compatible with actual thunderbird versions

(I'm running the actual Thunderbird version 68.10.0 64-bit)

This review is for a previous version of the add-on (3.8.0).  This user has a previous review of this add-on.