Leak Lookbook

Wisdom Vault
Passwords are safely inaccessible to 3rd party JavaScript vendors due to use of an invisible iframe leveraging cross-origin isolation (CORS).
Firefox Verification
Security and authentication related data must not be visible to any 3rd party vendor, particularily session replay.
Github Secret Gist
Because the user has marked the gist as secr4et, the contents should not be accessible to any 3rd party vendor.