Web Secure Contexts
Fleeting- External reference: https://developer.mozilla.org/en-US/docs/Web/Security/Secure_Contexts
web secure contexts
Locally-delivered resources such as those with http://127.0.0.1 URLs, http://localhost and http://*.localhost URLs (e.g. http://dev.whatever.localhost/), and <//> URLs are also considered to have been delivered securely
— https://developer.mozilla.org/en-US/docs/Web/Security/Secure_Contexts