diff --git a/defaults/pref/local-settings.js b/defaults/pref/local-settings.js
index 3d60270..3f8489f 100644
--- a/defaults/pref/local-settings.js
+++ b/defaults/pref/local-settings.js
@@ -8,3 +8,4 @@ pref("general.config.obscure_value", 0);
 
 pref("browser.tabs.drawInTitlebar", false); 
 pref("browser.newtabpage.activity-stream.feeds.topsites", false); 
+pref("devtools.selfxss.count", 5);