I tried going to https://recursiontracker.com/ to re-download the stat tracker just now.
And it gave me the "Your connection is not secure" error along with this message:

recursiontracker.com uses an invalid security certificate.
The certificate expired on 20 May 2016 13:19.
The current time is 20 May 2016 19:59.
Error code: SEC_ERROR_EXPIRED_CERTIFICATE

Dont know if that helps at all.