by cbaker_admin » Fri Dec 20, 2019 5:02 pm
I'm sorry, but no.
FEBE/CLEO/TEBE are written with the now deprecated XPCOM/XUL apis and cannot be ported to the WebExtenions platform. FEBE requires deep access to Firefox internal files (bookmarks, passwords, history, etc.) and WebExtensions simply does not (nor ever will, apparently) offer the needed apis. FEBE/CLEO only work with Fx v56.0.2 and below as well as the Pale Moon browser.
TEBE, however, still works with Thunderbird - at least with the version I am using (v52.0). Have you tried using it with Tb v68?
Chuck