What you are seeing is coming from the network and browser, and not from EEM.
I see that you are also using the IP address to access EEM and not a DNS name.
If you use the FQDN in the URL instead of the IP, do you see the same behavior?
You can disable the warning in the browser by doing the following in FireFox:
(1) In a new tab, type or paste about:config in the address bar and press Enter. Click the button promising to be careful.
(2) In the search box that appears above the list, type or paste redi and pause while the list is filtered
(3) Double-click network.http.prompt-temp-redirect to switch its value from true (the default) to false.