Very Helpful Rated 5 out of 5 stars

This is a really useful addon. I haven't tried out the various enhanced security like locking. But this solves a serious irritation for me. On Thunderbird (11) with Lightning and 3 Google calendars being read, I was being prompted for the master password 4 times on startup! With this add-on I now enter it once on startup, and that's it.

This review is for a previous version of the add-on (1.17.1-signed).