When trying to connect to well known sites, for instance
hotmail.com Firefox shows that
This Connection in Untrusted. In the Options>Advanced>Certificates it's configured to select one matching certificate automatically. Why Firefox does not trust current connection? Can it be Man-in-the-middle attack or it's something like broken certificate storage on my computer?
Solved: the problem is Antivirus Web Access protection. It interferes with HTTPS connection. Similar to Man-in-the-middle? Why ESET cannot do it correctly?