diff --git a/browser/experiments/ExperimentsService.js b/browser/experiments/ExperimentsService.js
index 516863d2c71..e2b38c99ca2 100644
--- a/browser/experiments/ExperimentsService.js
+++ b/browser/experiments/ExperimentsService.js
@@ -8,8 +8,27 @@ const {interfaces: Ci, utils: Cu} = Components;
 
 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 Cu.import("resource://gre/modules/Services.jsm");
-Cu.import("resource:///modules/experiments/Experiments.jsm");
-Cu.import("resource://gre/modules/osfile.jsm")
+
+XPCOMUtils.defineLazyModuleGetter(this, "Experiments",
+                                  "resource:///modules/experiments/Experiments.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "OS",
+                                  "resource://gre/modules/osfile.jsm");
+
+const PREF_EXPERIMENTS_ENABLED  = "experiments.enabled";
+const PREF_HEALTHREPORT_ENABLED = "datareporting.healthreport.service.enabled";
+const PREF_TELEMETRY_ENABLED    = "toolkit.telemetry.enabled";
+
+XPCOMUtils.defineLazyGetter(
+  this, "gExperimentsEnabled", () => {
+    try {
+      let prefs = Services.prefs;
+      return prefs.getBoolPref(PREF_EXPERIMENTS_ENABLED) &&
+             prefs.getBoolPref(PREF_TELEMETRY_ENABLED) &&
+             prefs.getBoolPref(PREF_HEALTHREPORT_ENABLED);
+    } catch (e) {
+      return false;
+    }
+  });
 
 function ExperimentsService() {
 }
@@ -19,6 +38,9 @@ ExperimentsService.prototype = {
   QueryInterface: XPCOMUtils.generateQI([Ci.nsITimerCallback, Ci.nsIObserver]),
 
   notify: function (timer) {
+    if (!gExperimentsEnabled) {
+      return;
+    }
     if (OS.Constants.Path.profileDir === undefined) {
       throw Error("Update timer fired before profile was initialized?");
     }
@@ -28,7 +50,9 @@ ExperimentsService.prototype = {
   observe: function (subject, topic, data) {
     switch (topic) {
       case "profile-after-change":
-        Experiments.instance(); // for side effects
+        if (gExperimentsEnabled) {
+          Experiments.instance(); // for side effects
+        }
         break;
     }
   },