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by geococcyxc 4595 days ago
Care to elaborate? I do not think you will get a warning if the MITM is done with a certificate signed by a valid CA, even if you have approved some self-signed certificate before for that site. At least I have never seen this in any browser.
1 comments

You'll be protected against NSA-style snoop-everything passive attacks.

CAs will always be able to MITM you. Like I said: "the notion of CAs is problematic."

There are two caveats:

1) certificate pinning: your browser has a hard-coded list of certificates for all major websites (e.g. Chromium: https://code.google.com/p/chromium/codesearch#chromium/src/n... (scroll down!))

2) there are add-ons (ie Certificate Patrol) that warn you when the certificate changes