diff --git a/in/public/firefox/configure.rst b/in/public/firefox/configure.rst
index 8b37622..9415285 100644
--- a/in/public/firefox/configure.rst
+++ b/in/public/firefox/configure.rst
@@ -7,5 +7,7 @@ Configure
 Client certificates
 -------------------
 
-user_pref("security.default_personal_cert", "Ask Every Time");
-user_pref("security.default_personal_cert", "Select Automatically");
+.. code:: js
+
+ user_pref("security.default_personal_cert", "Ask Every Time");
+ user_pref("security.default_personal_cert", "Select Automatically");