--- a/toolkit/components/addoncompat/Prefetcher.jsm
+++ b/toolkit/components/addoncompat/Prefetcher.jsm
@@ -5,19 +5,16 @@
 this.EXPORTED_SYMBOLS = ["Prefetcher"];
 
 const Ci = Components.interfaces;
 const Cu = Components.utils;
 
 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 Cu.import("resource://gre/modules/Services.jsm");
 
-XPCOMUtils.defineLazyModuleGetter(this, "Preferences",
-                                  "resource://gre/modules/Preferences.jsm");
-
 // Rules are defined at the bottom of this file.
 var PrefetcherRules = {};
 
 /*
  * When events that trigger in the content process are forwarded to
  * add-ons in the chrome process, we expect the add-ons to send a lot
  * of CPOWs to query content nodes while processing the events. To
  * speed this up, the prefetching system anticipates which properties
@@ -343,27 +340,27 @@ var Prefetcher = {
       for (let trigger in PrefetcherRules[addon]) {
         for (let rule of PrefetcherRules[addon][trigger]) {
           rule.index = counter++;
           this.ruleMap.set(rule.index, rule);
         }
       }
     }
 
-    this.prefetchingEnabled = Preferences.get(PREF_PREFETCHING_ENABLED, false);
+    this.prefetchingEnabled = Services.prefs.getBoolPref(PREF_PREFETCHING_ENABLED, false);
     Services.prefs.addObserver(PREF_PREFETCHING_ENABLED, this);
     Services.obs.addObserver(this, "xpcom-shutdown");
   },
 
   observe(subject, topic, data) {
     if (topic == "xpcom-shutdown") {
       Services.prefs.removeObserver(PREF_PREFETCHING_ENABLED, this);
       Services.obs.removeObserver(this, "xpcom-shutdown");
     } else if (topic == PREF_PREFETCHING_ENABLED) {
-      this.prefetchingEnabled = Preferences.get(PREF_PREFETCHING_ENABLED, false);
+      this.prefetchingEnabled = Services.prefs.getBoolPref(PREF_PREFETCHING_ENABLED, false);
     }
   },
 
   // Called when an event occurs in the content process. The event is
   // described by the trigger string. |addons| is a list of addons
   // that have listeners installed for the event. |args| is
   // event-specific data (such as the event object).
   prefetch(trigger, addons, args) {