diff --git a/slave/configs.py b/slave/configs.py
index 73fb26b..476d993 100644
--- a/slave/configs.py
+++ b/slave/configs.py
@@ -21,6 +21,8 @@ class Default(object):
             self.env_["STYLO_FORCE_ENABLED"] = '1'
             self.prefs_["dom.max_script_run_time"] = 0
             self.prefs_["javascript.options.asyncstack"] = False
+            self.prefs_["datareporting.policy.firstRunURL"] = ""
+            self.prefs_["datareporting.policy.dataSubmissionPolicyBypassNotification"] = True
         elif engine == "chrome":
             pass
         elif engine == "webkit":