The Safeguard extension verifies the identity of the briefgeheimnis-application to protect it from modifications.
The Safeguard verifies all HTTP GET responses by hash comparison and defines a Whitelist of allowed URLs to prevent unwanted modifications of the briefgeheimnis-application. This functionality only works for the briefgeheimnis application.
Safeguard uses an Icon in the address bar to shows the correctness of the briefgeheimnis application. If the validation fails the Safeguard shows an error message instead of the application, to indicate the failed verification.