diff --git a/user.js b/user.js
index b21bfa0..ddb23d8 100644
--- a/user.js
+++ b/user.js
@@ -457,6 +457,8 @@ user_pref("browser.send_pings.require_same_host", true);
 user_pref("network.protocol-handler.external.ms-windows-store", false);
 /* 0608: disable predictor / prefetching [FF48+] ***/
 user_pref("network.predictor.enable-prefetch", false);
+/* 0609: disable Network Connectivity Services [FF65+] ***/
+pref("network.connectivity-service.enabled", false);
 
 /*** [SECTION 0700]: HTTP* / TCP/IP / DNS / PROXY / SOCKS etc ***/
 user_pref("_user.js.parrot", "0700 syntax error: the parrot's given up the ghost!");