--- a/browser/components/nsBrowserGlue.js
+++ b/browser/components/nsBrowserGlue.js
@@ -46,7 +46,6 @@ XPCOMUtils.defineLazyServiceGetter(this, "AlertsService", "@mozilla.org/alerts-s
   ["NewTabUtils", "resource://gre/modules/NewTabUtils.jsm"],
   ["OS", "resource://gre/modules/osfile.jsm"],
   ["PageThumbs", "resource://gre/modules/PageThumbs.jsm"],
-  ["PdfJs", "resource://pdf.js/PdfJs.jsm"],
   ["PermissionUI", "resource:///modules/PermissionUI.jsm"],
   ["PlacesBackups", "resource://gre/modules/PlacesBackups.jsm"],
   ["PlacesUtils", "resource://gre/modules/PlacesUtils.jsm"],
@@ -930,20 +929,6 @@ BrowserGlue.prototype = {
 
   // the first browser window has finished initializing
   _onFirstWindowLoaded: function BG__onFirstWindowLoaded(aWindow) {
-    // Initialize PdfJs when running in-process and remote. This only
-    // happens once since PdfJs registers global hooks. If the PdfJs
-    // extension is installed the init method below will be overridden
-    // leaving initialization to the extension.
-    // parent only: configure default prefs, set up pref observers, register
-    // pdf content handler, and initializes parent side message manager
-    // shim for privileged api access.
-    PdfJs.init(true);
-    // child only: similar to the call above for parent - register content
-    // handler and init message manager child shim for privileged api access.
-    // With older versions of the extension installed, this load will fail
-    // passively.
-    Services.ppmm.loadProcessScript("resource://pdf.js/pdfjschildbootstrap.js", true);
-
     if (AppConstants.platform == "win") {
       // For Windows 7, initialize the jump list module.
       const WINTASKBAR_CONTRACTID = "@mozilla.org/windows-taskbar;1";