Password Management Software for Firefox
MultiPassword
MultiPassword provides users with secure password management and storage. MultiPassword is available for all platforms via modern web browsers.
LessPass
With LessPass you can manage your registrations, login and passwords with is. LessPass is a password manager that computes a unique password using a site, login, and a master password for you mobile Android or iOS device or as a browser extension for Google Chrome and Firefox. Since a password manager, or any software for that matter is as secure as it is transparent, the LessPass source code is available on Github and can be inspected and perfected by anyone in the community.
Buttercup
Buttercup is a free and open-source password manager, available on all major platforms. With Buttercup you can track and store your login information for any service and device that you use. The application's securely encrypted vault allow you to store account information securely with additional support for 2FA/OTP (TOTP).
LastPass
LastPass is a freemium password manager that can keep your information private, secure, and hidden. The software store encrypted passwords online, so that you can enjoy unique and hard to crack passwords for each service you use, while providing a single login mechanism. LastPass is available for various web browsers and as applications for your smartphone.