CONSOLE ERROR: line 387: Mixed Content: The page at 'https://web-platform.test:8444/mixed-content/websocket-request/meta-csp/cross-origin-ws/top-level/no-redirect/blockable/ws-downgrade-blocks.https.html' was loaded over HTTPS, but attempted to connect to the insecure WebSocket endpoint 'ws://www1.web-platform.test:9001/stash_responder?redirection=no-redirect&action=purge&key=cfa34d46-8d96-4e29-995c-490d6b8b8860&path=%2Fmixed-content&content_type=application/json'. This request has been blocked; this endpoint must be available over WSS.
