Rated 5 out of 5 stars
I love this addon! It's so easy to use. The most difficult thing to figure out for the average user is how to obtain and install certificates, but this is explained via the website. I've not used pop email for some years now, so this addon is a welcome find!
As Bruce Tindall pointed out in an earlier review, most people don't use Firefox Password Manager so when you're prompted for a password, try leaving it blank and in most cases this should work.