diff --git a/user.js b/user.js
index 69c8403..0e5b105 100644
--- a/user.js
+++ b/user.js
@@ -229,7 +229,7 @@ user_pref("ghacks_user.js.parrot", "0400 syntax error: the parrot's passed on!")
  * [NOTE] It includes updates for "revoked certificates"
  * [1] https://blog.mozilla.org/security/2015/03/03/revoking-intermediate-certificates-introducing-onecrl
  * [2] https://trac.torproject.org/projects/tor/ticket/16931 ***/
-user_pref("extensions.blocklist.enabled", false);
+user_pref("extensions.blocklist.enabled", true);
 user_pref("extensions.blocklist.url", "https://blocklist.addons.mozilla.org/blocklist/3/%APP_ID%/%APP_VERSION%/");
 /* 0402: enforce Kinto blocklist updates (FF50+)
  * What is Kinto?: https://wiki.mozilla.org/Firefox/Kinto#Specifications