I am having trouble with https://support.microsoft.com in firefox and getting this message. It works fine in chrome though, After i disable decryption for it, it works fine in firefox as well. Why it is breaking in one browser with decryption enabled. Maybe there are other sites as well that i yet don't know are breaking as well for same reason.
Decrypting Microsoft is generally a bad idea as their site and applications use certificate pinning and will break if you try to decrypt it.
Here is a good article on resources:
Could you possibly provide more details about your setup - Chrome version, Firefox version, PAN-OS version? Configuration of Decryption Profile used in the Decryption Rule this traffic is hitting (from CLI: show profiles decryption <decryption-profile-name>)?
Have you checked the ciphers negotiated by Chrome and Firefox through packet-sniffing the TLS/SSL handshake?
Wouldn't you agree that properly implemented HPKP for a website would result in error reported by browser, not by PA?
Also it looks this website does not implement it (according to the https://gf.dev/hpkp-test).
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