Import subscriptions from http://subscription.requestpolicy.com/subs/
 * import http://subscription.requestpolicy.com/subs/official.json
 * import http://subscription.requestpolicy.com/subs/official/allow_embedded.json
 * http://subscription.requestpolicy.com/subs/official/allow_extensions.json was blank
 * http://subscription.requestpolicy.com/subs/official/allow_functionality.json was blank
 * http://subscription.requestpolicy.com/subs/official/allow_mozilla.json was blank
 * import http://subscription.requestpolicy.com/subs/official/allow_sameorg.json
 * http://subscription.requestpolicy.com/subs/official/deny_trackers.json