Review for LocalFolders by Graham Miller
Rated 4 out of 5 stars
All popup dialogs repeat their message following straight on from the end of the 1st.
I also had some trouble with the display of mailing list members in the address book which "seems" to have gone away once this extension was disabled. Not sure why that would be.
I am on Windows 7 pro with Thunderbird 45.1.1
To create your own collections, you must have a Mozilla Add-ons account.