When you sign in, the extension offers to capture the credentials you want to keep. Nothing is saved without your action.
Saved credentials are encrypted before they leave your device, then kept inside your VerityVault account with the rest of your private records.
Open the extension when you need a credential. Your vault stays locked until you choose to unlock it.
On a matching website, the extension can fill the saved username and password for you, so you can get on with what you came to do.
Credentials belong with the rest of your private information. The extension makes them easier to use without making them easier to expose. When you choose, you can also share an encrypted credential with trusted people in your circle.