diff --git a/user.js b/user.js
index df7c8a1..1928162 100644
--- a/user.js
+++ b/user.js
@@ -1502,6 +1502,7 @@ user_pref("mailnews.display.date_senders_timezone", false);
 /* 6030: Address book collection [SETUP-FEATURE]
  * Disable Thunderbird internal address book email collection
  * Consider using CardBook extension instead (https://addons.thunderbird.net/addon/cardbook/)
+ * [SETTING] Preferences>Composition>Addressing>Automatically add outgoing e-mail addresses...
  * [SETTING][CARDBOOK] CardBook>Preferences>Email>Collect Outgoing Email ***/
 user_pref("mail.collect_addressbook", "");  // [DEFAULT: "jsaddrbook://history.sqlite"]
 user_pref("mail.collect_email_address_outgoing", false);