Rated 5 out of 5 stars

per Bruce Fraser el set. 16, 2015 ·

CompactHeader may have had problems recently (according to Nemo_bis), but it's working fine now in Thunderbird 38.2. It was updated September 16, 2015, so that may have been the fix.

This review is for a previous version of the add-on (2.1.0).