unknownEmbedShapePermissionOverrides

Overrides for unknown/arbitrary embeds that aren't in the curated embed definitions list. These restrict the most dangerous sandbox permissions to mitigate: - Same-origin sandbox escape (allow-scripts + allow-same-origin lets the iframe remove its own sandbox) - Phishing via embedded forms - Popup-based social engineering

unknownEmbedShapePermissionOverrides: TLEmbedShapePermissions;