Term Kind Topic What it is
Origin Isolation Sandbox Origin, User Content Origin practice Frontend Security Serving user-uploaded or untrusted content from a separate origin, so that content executing there has no access to the application's session, storage or DOM.
Third-Party Script Governance Page as an Execution Environment, Vendor Script Review practice Frontend Security Reviewing and constraining what executes on a page, because every third-party script runs with the page's full privileges - and each one is added individually while the aggregate determines the security posture.