TLS is a system designed to support both authentication and encryption. Losing authentication is actually a pretty big deal, so of course browsers won&#x27;t do it.<p>Encryption without authentication isn&#x27;t really a good idea, because you can trivially MITM someone, serve them your certificate for google.com, open up a connection to google.com yourself, and it&#x27;s now effectively as good as plain-text.<p>The security community was really upset with SuperFish and the recent Dell eRoot for the same reason -- you effectively lost accurate authentication, making it pretty easy to degrade someone&#x27;s connection to plain-text.