This add-on talks to a companion desktop app (Secure Vault) over a token-authenticated localhost connection (127.0.0.1). Without the app running and unlocked it stays idle and shows "Can't reach the app" — there is no remote service and no account to log into. All credentials stay on the user's machine; the extension transmits nothing externally. You can find the app on github: https://github.com/Wazard/AES-Local-Password-Manager
