Rated 4 out of 5 stars

This just seemed to work... until I needed to change my password. The instructions for changing a password in Thunderbird are already a little arcane (first locate a way to erase the password, then restart and you will be asked to fill in the new one); but with KSI enabled, I was not asked. This seems like a critical bug (at least need a doc fix asap). Note that I do have several email accounts that this Thunderbird knows about, each with a distinct password. (Thunderbird version: 24.6.0)

This review is for a previous version of the add-on (1.1.8.1-signed.1-signed). 

Hmm.. so Firefox asks you if you want to update the password whenever you change it on a website, but I'm not sure how Thunderbird handles that. The easiest thing will probably be to launch Keychain Access.app (inside the Utitlies folder in your Applications folder) and change it in the keychain directly.