Developer reply by Jeevanandam M.
Rated 5 out of 5 stars
Loved this until version 128.
Not working in the least.
EDIT:
The developer has been very responsive and concerned about his add-on. It turns out that the add-on didn't work with Owl based Exchange accounts, only IMAP As of today, I have a debug / dev version installed that takes a different approach to identifying accounts and can verify that the problem has been resolved!
Hi Bryan Licenser - For TB v128, you need to install the latest version, RWH v3.0.0
V3 is written from the ground up with a web/mail extension model.
Could you go ahead and uninstall the previous version of RWH and install the latest?
To create your own collections, you must have a Mozilla Add-ons account.