diff -Nuar a/gonullu/config/sandbox-requirement.yml b/gonullu/config/sandbox-requirement.yml
--- a/gonullu/config/sandbox-requirement.yml	2017-03-07 10:06:31.000000000 +0300
+++ b/gonullu/config/sandbox-requirement.yml	2017-12-08 19:28:31.399214708 +0300
@@ -7,3 +7,5 @@
 - gtk2
 - ModemManager
 - vlc
+- firefox
+- systemtap