ZDNet took a look at Google and their black listing all digital certificates issued by the organization that manages the .cn extension. The article goes on to discuss what steps Firefox may take with regards to CNNIC.
Full Article: http://www.thedomains.com/2015/04/03/google-to-blacklist-all-digital-certificates-from-cnnic/Google, Mozilla, and Microsoft last week responded to a mis-issued digital certificate from an Egyptian company called MCS Holdings, which could have allowed an attacker to impersonate a Google site and intercept traffic to and from it.
While the error was MCS Holdings’, Google blamed CNNIC for delegating “substantial authority to an organization that was not fit to hold it”.