I assumed that you watched the video tutorial link that I posted in my previous post that demonstrates and explains how to check your website with the hidemyass.com Proxy. You can of course use another Proxy, but I think that is the best one available.
This is an essential video tutorial (link posted again below) that explains how to check your website as if you are a visitor to your website. Using the hidemyass.com Proxy allows you to visit your website with a different IP address, which simulates that you are visitor to your website. The BPS Pro Plugin Firewall automatically whitelists your current IP address and dynamically updates your current IP address. So if you are checking your website normally/with your current IP address then everything will always display correctly to you since your IP address is always whitelisted in the Plugin Firewall. For frontloading plugin scripts that need to be whitelisted for all IP addresses you add a Plugin Firewall whitelist rule for those plugin scripts.
http://forum.ait-pro.com/video-tutorials/#security-log-firewall
How the Plugin Firewall works
http://forum.ait-pro.com/forums/topic/plugin-firewall-read-me-first-troubleshooting/
Proxies protect themselves. If a script is loading that the Proxy does not allow then it will block that script. Proxies are good for checking if things are blocked on your site to visitors to your site because you can check your website using a different IP address (simulates a visitor to your website) that the Proxy uses. Proxies are not good for checking if things are working correctly or displaying correctly since Proxies block scripts that they do not allow to load in their Proxy browser/Server/etc.