CONSOLE ERROR: line 121: Mixed Content: The page at 'https://web-platform.test:8444/mixed-content/link-prefetch-tag/http-csp/same-host-http/top-level/no-redirect/optionally-blockable/opt-in-blocks.https.html' was loaded over HTTPS, but requested an insecure prefetch resource 'http://web-platform.test:8001/mixed-content/generic/expect.py?redirection=no-redirect&action=purge&key=80a8b149-da95-47b0-a45e-b9752c108d2d&path=%2Fmixed-content&content_type=text/html'. This request has been blocked; the content must be served over HTTPS.
