Local means
local.
ClipForge Lockbox encrypts selected images in your browser with Web Crypto AES-GCM and stores the ciphertext in local IndexedDB.
What it does not do: It does not upload, sync, analyze, sell, share, or recover your images or password. Clearing extension data or losing the password can permanently destroy access. It cannot protect a device that is already compromised.
The extension has no host permissions, no content scripts, no remote code, and no analytics. The two advertisement placeholders are static and load no ad code or tracking.