Rated 5 out of 5 stars

I love it.

Here is a bug.

Preferences->Security->Passwords->User master password

This conflicts with the addon and makes thunderbird almost unusable. I had to remove the add-on, remove the master password and reinstall the add-on.

This review is for a previous version of the add-on (1.0.1).  This user has a previous review of this add-on.