They probably should've linked to a better intro to Secure Contexts than a standards document. Here's a simple explanation for them from Mozilla: https://devel

They probably should've linked to a better intro to Secure Contexts than a standards document. Here's a simple explanation for them from Mozilla: https://developer.mozilla.org/en-US/docs/Web/Security/Secure_Contexts https://developer.mozilla.org/en-US/docs/Web/Security/Secure... Features Restricted to Secure Contexts: https://developer.mozilla.org/en-US/docs/Web/Security/Secure_Contexts/features_restricted_to_secure_contexts https://developer.mozilla.org/en-US/docs/Web/Security/Secure... Chrome's Secure Origins seem to be the same thing: https://www.chromium.org/Home/chromium-security/prefer-secure-origins-for-powerful-new-features https://www.chromium.org/Home/chromium-security/prefer-secur...