This means your browser or some other security app is probably expecting something over SSL but we don't use SSL for anything. You can either ignore the warnings, or configure whatever it is giving you the warnings to stop doing so. It may be that your browser is just asking for everything over https by default, but I don't think Firefox (which is what it appears you're using?) has any default means to do that, so it'd be some sort of additional add-on or plug-in that's doing it in that case.