Rated 4 out of 5 stars

Bonjour et merci pour le travail accompli. Je ne parviens pas à installer l'extension "déplacer les dossiers" dans la version 102.9.1 (64 bits) de Thunderbird, est-ce normal? Merci, Yves

This review is for a previous version of the add-on (3.3.2). 

Bonjour, merci!
Is it possible you are asking about a different extension :
https://addons.thunderbird.net/en-US/thunderbird/addon/move-folder-context-menu/?src=ss
If yes, that is not my extension. If you are asking about LocalFolders then can you post your issue in the github repository, we can discuss there:
https://github.com/cleidigh/Localfolder-TB/issues

Christopher