@marcusxman you were not alone.
Yes, I faced the same security error lockout and reported it to you @jesta :
https://steemit.com/chainbb/@jesta/chainbb-com-temporarily-down#@ronmamita/re-jesta-chainbb-com-temporarily-down-20170801t013422119z

@jesta BUG REPORT!
Today, 31 July 2017 my firefox browser redirected my chainbb to the security alert and simultaneously blocking me from chainbb - the redirect warns me the connection is not secure. to protect my information from being stolen firefox has not connected this website. Furthermore, they claim the security certificate expired on 31 July 2017 at 8:27 PM Error code: SEC_ERROR_EXPIRED_CERTIFICATE

Below is a screen capture:

I closed the chainbb and stayed in steemit hoping for a reply from @jesta ...
When no reply came, I closed my browser for some rest and returned now.
Glad to see @jesta has manually fixed it. Cheers!