Nope, not from Mars.
This one was from Mozilla. I went along to EchoEcho.com (careful now…) to quickly find the syntax for hidden fields in an HTML form.
And this was the warning I received in the Mozilla Firefox web browser:
This is a first for me, I didn't even realise there was such a service.
Luckily I use SmugBuntu GNU/Linux, and I am Immune To All Virii!!