Even new and shiny stuff uses client certificates. RE: Kubernetes (<a href="https:&#x2F;&#x2F;github.com&#x2F;kubernetes&#x2F;kubernetes&#x2F;blob&#x2F;master&#x2F;docs&#x2F;admin&#x2F;authentication.md#authentication-plugins" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;kubernetes&#x2F;kubernetes&#x2F;blob&#x2F;master&#x2F;docs&#x2F;ad...</a>)<p>Loading this into the browser is often desirable for access to the proxy API.