Download the signed extension from the releases page and Firefox should prompt you to install. If not, go to (in Firefox)
Settings -> Add-ons -> Settings icon (Top-left) -> Install Add on From File
PRs are always welcome.
CryptoJS v3.1.2
code.google.com/p/crypto-js
(c) 2009-2013 by Jeff Mott. All rights reserved.
code.google.com/p/crypto-js/wiki/License