diff --git a/user.js b/user.js
index 7aa3002..553bea9 100644
--- a/user.js
+++ b/user.js
@@ -335,8 +335,9 @@ user_pref("network.gio.supported-protocols", ""); // [HIDDEN PREF]
  * [4] https://www.eff.org/deeplinks/2020/12/dns-doh-and-odoh-oh-my-year-review-2020 ***/
    // user_pref("network.trr.mode", 5);
 /* 0706: disable proxy direct failover for system requests [FF91+]
- * [WARNING] Default true is a security feature against malicious extensions
- * [SETUP-CHROME] If you use a proxy and you trust your extensions ***/
+ * [WARNING] Default true is a security feature against malicious extensions [1]
+ * [SETUP-CHROME] If you use a proxy and you trust your extensions
+ * [1] https://blog.mozilla.org/security/2021/10/25/securing-the-proxy-api-for-firefox-add-ons/ ***/
    // user_pref("network.proxy.failover_direct", false);
 
 /*** [SECTION 0800]: LOCATION BAR / SEARCH BAR / SUGGESTIONS / HISTORY / FORMS ***/