Rated 5 out of 5 stars
Awesome add-on! The latest update finally adds the great feature which warns you when you try to login using a weak or duplicated password. That way you can update your passwords easily while you are surfing and don't have to do a massive password update for all your passwords.
ALSO: To make sure you are using the latest stable version for Firefox, DOWNLOAD IT HERE: https://lastpass.com/download/cdn/lp_win.xpi
(unfortunately they didn't (yet?) release the latest version here in addons.mozilla.org)