Firejail: security sandbox I’m trying to get back into editing Wikipedia. Wikipedia has a policy that editors are not allowed to use VPNs or anything that hides their IP address, but makes an exception for users behind the Great Firewall of China and other countries that censor Internet access. I didn’t want to give up using my VPN – currently Mullvad VPN, whose service I’ve been quite pleased with – so I had to find a way to edit Wikipedia using the IP address from my ISP.