> # yum update selinux-policy-sandbox policycoreutils-sandbox > --enablerepo=updates-testing > selinux-policy-sandbox was not present on my system, I installed it now. rpm -qa \*sandbox selinux-policy-sandbox-3.12.1-161.fc20.noarch policycoreutils-sandbox-2.2.5-4.fc20.x86_64 It still doesn't work: sandbox -X -t sandbox_web_t firefox Failed to execute command /usr/share/sandbox/sandboxX.sh: Operation not permitted going to downgrade libcap-ng again... -- selinux mailing list selinux@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/selinux