CONSOLE ERROR: line 121: Mixed Content: The page at 'https://web-platform.test:8444/mixed-content/link-prefetch-tag/http-csp/cross-origin-http/top-level/swap-scheme-redirect/optionally-blockable/opt-in-blocks.https.html' was loaded over HTTPS, but requested an insecure prefetch resource 'http://www1.web-platform.test:8001/mixed-content/generic/expect.py?redirection=swap-scheme-redirect&action=purge&key=f5b6df15-cb2b-47c3-b944-5f01d506df2e&path=%2Fmixed-content&content_type=text/html'. This request has been blocked; the content must be served over HTTPS.
