Proper intention but doesn't save settings and have to reset on browser restart.
Lacks of information about the MITM. No notification when redirecting. Therefore it's hard to learn the cheating players in the internet game. We need a PRISM icon on links or something similar like a Snowden face doing "nono".

On the same topic i found this: https://addons.mozilla.org/en-US/firefox/addon/are-links-vulnerable-to-mitm/ that indicates if there is a MITM (broader than just Cloudflare) with FDN's API.