Rated 4 out of 5 stars

per Michael el jul. 31, 2013 ·

User NaTong claims this function is built into TB v17 but it does not appear to be anywhere.https://addons.mozilla.org/en-US/thunderbird/addon/flat-folder-tree/reviews/476672/It does still break any folder sorting done by "Manually Sort Folders 1.1", which is unfortunate that they don't work together.