I noticed that the Plugin Firewall read me first topic did not have a plain/simple explanation of what whitelisting frontloading plugin scripts does so I just added this additional help info below to that topic.
Whitelisting frontloading plugin scripts allows those whitelisted plugin scripts to load on the frontside of your website for any IP address. This is completely safe to do since only the frontloading plugin script that you whitelist in the Plugin Firewall will load on the frontside of your website for all IP addresses (website visitor IP addresses) and all other plugin files will still remain protected/not accessible behind the Plugin Firewall to any other IP addresses except for your IP address.