--- a/dom/browser-element/BrowserElementChildPreload.js
+++ b/dom/browser-element/BrowserElementChildPreload.js
@@ -1,16 +1,14 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
  * You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 "use strict";
 
-dump("######################## BrowserElementChildPreload.js loaded\n");
-
 var BrowserElementIsReady = false;
 
 var { classes: Cc, interfaces: Ci, results: Cr, utils: Cu }  = Components;
 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 Cu.import("resource://gre/modules/Services.jsm");
 Cu.import("resource://gre/modules/BrowserElementPromptService.jsm");
 Cu.import("resource://gre/modules/Task.jsm");
 Cu.import("resource://gre/modules/ExtensionContent.jsm");

--- a/dom/browser-element/BrowserElementCopyPaste.js
+++ b/dom/browser-element/BrowserElementCopyPaste.js
@@ -1,18 +1,16 @@
 /* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- /
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
  * You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 "use strict";
 
-dump("###################################### BrowserElementCopyPaste.js loaded\n");
-
 var { classes: Cc, interfaces: Ci, results: Cr, utils: Cu }  = Components;
 
 var CopyPasteAssistent = {
   COMMAND_MAP: {
     'cut': 'cmd_cut',
     'copy': 'cmd_copyAndCollapseToEnd',
     'paste': 'cmd_paste',
     'selectall': 'cmd_selectAll'

--- a/dom/browser-element/BrowserElementPanning.js
+++ b/dom/browser-element/BrowserElementPanning.js
@@ -1,17 +1,16 @@
 /* -*- tab-width: 2; indent-tabs-mode: nil; js-indent-level: 2 -*- */
 /* vim: set ts=2 sw=2 sts=2 et: */
 
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
  * You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 "use strict";
-dump("############################### browserElementPanning.js loaded\n");
 
 var { classes: Cc, interfaces: Ci, results: Cr, utils: Cu }  = Components;
 Cu.import("resource://gre/modules/Services.jsm");
 Cu.import("resource://gre/modules/Geometry.jsm");
 
 const kObservedEvents = [
   "BEC:ShownModalPrompt",
   "Activity:Success",

--- a/dom/ipc/extensions.js
+++ b/dom/ipc/extensions.js
@@ -1,13 +1,11 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
  * You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 "use strict";
 
-dump("######################## extensions.js loaded\n");
-
 ExtensionContent.init(this);
 
 addEventListener("unload", () => {
   ExtensionContent.uninit(this);
 });