Browser extension for Buttercup
Manage your online identities and credentials with Buttercup: An open-source, free and secure credentials manager. Buttercup uses the strongest industry techniques to encrypt and store your details in a variety of locations of your choosing. Use Dropbox, ownCloud or a WebDAV connection to remotely host your archive for high accessibility.
Buttercup's browser extension also allows you to capture newly entered details when you login or signup to a website. Credentials that you save are securely encrypted and stored in a service provider of your choice. Only your master password can open archives that you create and save.