diff --git a/user.js b/user.js
index 24b914f..32dc6bb 100644
--- a/user.js
+++ b/user.js
@@ -334,6 +334,9 @@ user_pref("dom.flyweb.enabled", false);
  * [2] https://github.com/mozilla/normandy ***/
 user_pref("extensions.shield-recipe-client.enabled", false);
 user_pref("extensions.shield-recipe-client.api_url", "");
+/* 0513: disable Follow On Search (FF53+)
+ * Just DELETE the XPI file in your system add-ons directory
+ * [1] https://blog.mozilla.org/data/2017/06/05/measuring-search-in-firefox/ ***/
 /* 0514: disable Activity Stream (FF54+)
  * Activity Stream replaces "New Tab" with one based on metadata and browsing behavior,
  * and includes telemetry as well as web content such as snippets and "spotlight"