Comment 13 for bug 2046844

RE: security.apparmor attribute attachment not working

Sorry for the current version of apparmor in Ubuntu requires a path attachment as well, you need to change the profile to (caveat untested so I may have made another mistake too)

profile falkon /** xattrs=(security.apparmor=falkon) flags=(unconfined) {
  userns,
  include if exists <local/falkon>
}