Difference in Versions Rated 5 out of 5 stars

Why is it that the version of LastPass available here is always weeks behind the LastPass version available over at www.lastpass.com? The latest version for Firefox is v2.0.20 which was released on February 7th 2013. The current date is 4/5/2013

Can anybody shed some light on this.

This review is for a previous version of the add-on (2.0.0).  This user has a previous review of this add-on.