Well, with Chrome, I have the PA cert imported as trusted publisher, root, etc. But, even if Google.com is in the decryption profile, Chrome itself ignores the Palo cert. I go to google.com or YouTube.com and look at the certificate, instead of my cert, it's google's own cert. But all other websites that use SSL do show my cert correctly, so I know it's working. It's only HPKP (or it might just be google's own sites). As for Firefox, I'm using the latest version on my test machine. While I can easily make any conf changes here, the main issue is that there is no practical way to add certificates to Firefox on an enterprise-scale. It doesn't use GPO, so the cert has to be manually added to each installation. Then it wil work with "normal" websites and I verified that it decrypts. But it will not work with HPKP, unless each Firefox installation is manually changed with that setting you mentioned earlier (which I haven't had a chance to test yet). Chrome isn't the main issue, because it just overrides the PA cert and allows the user to pass without a warning message. I'm not too concerned about decrypting Google's websites. Firefox on the other hand, presents a hard security warning and prevents bypassing it.
... View more