Customers using Firefox have been seeing SSL errors when using the custom branded URL. We can duplicate the error using FF, with version 27.0.1.
If you continue to see these errors, please contact support so the issue can be investigated and resolved!
System Support Team
SaaS Email & Web Security Technical Support
I already did and it's now a known issue. However I did not see a service alert for it. Just though I would see if anyone else was seeing the same.
The issue has been corrected so far. We use the domain.console.mcafeesaas.com URL. The direct URL console.mcafeesaas.com had no issues.