I don't think it's possible to buy a certificate with a dot at the end, so I don't see how this is Google's problem. It seems to be either a problem with Firef

I don't think it's possible to buy a certificate with a dot at the end, so I don't see how this is Google's problem. It seems to be either a problem with Firefox or with the domain name system in general. It looks like the problem should be fixed in 2016 because then all non-FQDN certificates will have expired. Then browsers can go ahead and assume that google.com. in a url is the same as google.com in a certificate.