[jntrnr]

website owner here: odd, what configuration of firefox gives you that warning. When I connect with a recent OS X version, it seems to work okay.

[sp332]

Firefox on Windows here. Looks like it's getting the certificate for github, but throwing an error because your domain isn't listed in that certificate. https://imgur.com/a/UeXtC

[jntrnr]

Yeah, it's not set up for https. Do you see the same thing with http://www.jonathanturner.org/?

[sp332]

Nope, that's fine. Not sure why 0xmohit posted the HTTPS link in the first place.

[heinrich5991]

Same error for Firefox on Linux.