diff --git a/README.md b/README.md
index bc93c72a..adea4270 100644
--- a/README.md
+++ b/README.md
@@ -246,6 +246,7 @@ Disable Firefox integrated metrics/reporting/experiments, disable potentially in
 * Enable blocking reported attack sites [ [1](http://kb.mozillazine.org/Browser.safebrowsing.malware.enabled) ]
 * Disable querying Google Application Reputation database for downloaded binary files [ [1](https://www.mozilla.org/en-US/firefox/39.0/releasenotes/) [2](https://wiki.mozilla.org/Security/Application_Reputation) ]
 * Disable Pocket [ [1](https://support.mozilla.org/en-US/kb/save-web-pages-later-pocket-firefox) [2](https://github.com/pyllyukko/user.js/issues/143) ]
+* Disable SHIELD [ [1](https://support.mozilla.org/en-US/kb/shield) [2](https://bugzilla.mozilla.org/show_bug.cgi?id=1370801) ]
 
 ### Automatic connections
 
diff --git a/user.js b/user.js
index fca96fc9..434ce75e 100644
--- a/user.js
+++ b/user.js
@@ -566,6 +566,12 @@ user_pref("browser.safebrowsing.downloads.remote.enabled",	false);
 user_pref("browser.pocket.enabled",				false);
 user_pref("extensions.pocket.enabled",				false);
 
+// PREF: Disable SHIELD
+// https://support.mozilla.org/en-US/kb/shield
+// https://bugzilla.mozilla.org/show_bug.cgi?id=1370801
+user_pref("extensions.shield-recipe-client.enabled",		false);
+user_pref("app.shield.optoutstudies.enabled",			false);
+
 /******************************************************************************
  * SECTION: Automatic connections                                             *
  ******************************************************************************/