Do you use a site called extfeed.net?

I'm using Chrome version 38.0.2125.104 m on a Windows 7 Service pack 1 computer to access doit.im on the web. The browser sometimes displays messages like "waiting fro doit.im..." which I understand. Recently I've seen unexpected messages like "waiting for extfeed.net...." Sometimes these messages flicker as does the icon on the tab which represents doit.im. Since I've been using doit.im for a few years and have not seen this message before, I was concerned that extfeed.net might be an example of a malicious site.

Do you use a site called extfeed.net in operating the doit.im system?

Thanks.

Doug