diff --git a/mozilla/modules/libpref/src/init/all.js b/mozilla/modules/libpref/src/init/all.js
index e88e4b115dc..0f4ad334190 100644
--- a/mozilla/modules/libpref/src/init/all.js
+++ b/mozilla/modules/libpref/src/init/all.js
@@ -254,6 +254,8 @@ pref("capability.policy.default.History.toString", "UniversalBrowserRead");
 
 pref("capability.policy.default.HTMLDocument.close", "allAccess");
 pref("capability.policy.default.HTMLDocument.open", "allAccess");
+pref("capability.policy.default.HTMLDocument.write", "allAccess");
+pref("capability.policy.default.HTMLDocument.writeln", "allAccess");
 
 pref("capability.policy.default.Location.hash.set", "allAccess");
 pref("capability.policy.default.Location.href.set", "allAccess");