These are apparmor profiles that can greatly increase security and protect against exploits and malware.
I've only tested these on Arch Linux but they should work on other Linux distros.
How to use
Place whichever apparmor profile you want in /etc/apparmor.d/ and run
aa-enforce (profile) as root.
Your Firefox profile cannot be loaded. It may be missing or inaccessible.
mkdir -p ~/.cache/mozilla/firefox/