Strange text appearing in header

I don’t see any strange code in Firefox 35. Would you please quote the code you’re seeing?

Hi James, Thanks for your reply.

Please take a look at these screenshots:

https://postimg.org/image/469h3wdwp/
https://postimg.org/image/s1z06ltc9/

Ah, I see that in Chrome too, so I figured it was part of your site.

If you’re saying that you didn’t add it yourself, remain calm and carefully follow this guide. When you’re done, you may want to implement some (if not all) of the recommended security measures.