From http://www.ghacks.net/2014/03/02/lastpass-updated-mozilla-add-ons/: Comparison: https://lastpass.com/upgrade.php?fromwebsite=1&releasenotes=1 vs https://addons.mozilla.org/en-US/firefox/addon/lastpass-password-manager/versions/.
https://addons.mozilla.org/en-US/firefox/addon/lastpass-password-manager/reviews/626466/ FYI: The XPI distributed at their website is configured to update from https://lastpass.com/... instead of AMO.
1. The latest version offered at Mozilla is v3.1.1.1-signed, from February 26, 2014! 2. Manual Firefox add-on update checking had not warned me that I was using an older version of LastPass.