deleted file mode 100644
--- a/devtools/client/inspector/changes/actions/index.js
+++ /dev/null
@@ -1,14 +0,0 @@
-/* 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";
-
-const { createEnum } = require("devtools/client/shared/enum");
-
-createEnum([
-
-  // Update the entire changes state with the new list of changes.
-  "UPDATE_CHANGES",
-
-], module.exports);

deleted file mode 100644
--- a/devtools/client/inspector/changes/actions/moz.build
+++ /dev/null
@@ -1,9 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# 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/.
-
-DevToolsModules(
-    'index.js',
-)

deleted file mode 100644
--- a/devtools/client/inspector/changes/changes.js
+++ /dev/null
@@ -1,50 +0,0 @@
-/* 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";
-
-const { createFactory, createElement } = require("devtools/client/shared/vendor/react");
-const { Provider } = require("devtools/client/shared/vendor/react-redux");
-
-const ChangesApp = createFactory(require("./components/ChangesApp"));
-
-const { LocalizationHelper } = require("devtools/shared/l10n");
-const INSPECTOR_L10N =
-  new LocalizationHelper("devtools/client/locales/inspector.properties");
-
-class ChangesView {
-  constructor(inspector, window) {
-    this.document = window.document;
-    this.inspector = inspector;
-    this.store = inspector.store;
-
-    this.init();
-  }
-
-  init() {
-    if (!this.inspector) {
-      return;
-    }
-
-    let changesApp = ChangesApp({});
-
-    let provider = createElement(Provider, {
-      id: "changesview",
-      key: "changesview",
-      store: this.store,
-      title: INSPECTOR_L10N.getStr("inspector.sidebar.changesViewTitle")
-    }, changesApp);
-
-    // Expose the provider to let inspector.js use it in setupSidebar.
-    this.provider = provider;
-  }
-
-  destroy() {
-    this.document = null;
-    this.inspector = null;
-    this.store = null;
-  }
-}
-
-module.exports = ChangesView;

deleted file mode 100644
--- a/devtools/client/inspector/changes/components/ChangesApp.js
+++ /dev/null
@@ -1,25 +0,0 @@
-/* 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";
-
-const { PureComponent } = require("devtools/client/shared/vendor/react");
-const dom = require("devtools/client/shared/vendor/react-dom-factories");
-const { connect } = require("devtools/client/shared/vendor/react-redux");
-
-class ChangesApp extends PureComponent {
-  static get propTypes() {
-    return {};
-  }
-
-  render() {
-    return dom.div(
-      {
-        id: "changes-container",
-      }
-    );
-  }
-}
-
-module.exports = connect(state => state)(ChangesApp);

deleted file mode 100644
--- a/devtools/client/inspector/changes/components/moz.build
+++ /dev/null
@@ -1,9 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# 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/.
-
-DevToolsModules(
-    'ChangesApp.js',
-)

deleted file mode 100644
--- a/devtools/client/inspector/changes/moz.build
+++ /dev/null
@@ -1,15 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# 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/.
-
-DIRS += [
-    'actions',
-    'components',
-    'reducers',
-]
-
-DevToolsModules(
-    'changes.js',
-)

deleted file mode 100644
--- a/devtools/client/inspector/changes/reducers/changes.js
+++ /dev/null
@@ -1,19 +0,0 @@
-/* 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";
-
-const INITIAL_CHANGES = [];
-
-let reducers = {
-
-};
-
-module.exports = function(changes = INITIAL_CHANGES, action) {
-  let reducer = reducers[action.type];
-  if (!reducer) {
-    return changes;
-  }
-  return reducer(changes, action);
-};

deleted file mode 100644
--- a/devtools/client/inspector/changes/reducers/index.js
+++ /dev/null
@@ -1,7 +0,0 @@
-/* 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";
-
-exports.changes = require("./changes");

deleted file mode 100644
--- a/devtools/client/inspector/changes/reducers/moz.build
+++ /dev/null
@@ -1,10 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# 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/.
-
-DevToolsModules(
-    'changes.js',
-    'index.js',
-)

deleted file mode 100644
--- a/devtools/client/inspector/events/actions/index.js
+++ /dev/null
@@ -1,14 +0,0 @@
-/* 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";
-
-const { createEnum } = require("devtools/client/shared/enum");
-
-createEnum([
-
-  // Update the entire events state with the new list of events.
-  "UPDATE_EVENTS",
-
-], module.exports);

deleted file mode 100644
--- a/devtools/client/inspector/events/actions/moz.build
+++ /dev/null
@@ -1,9 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# 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/.
-
-DevToolsModules(
-    'index.js',
-)

deleted file mode 100644
--- a/devtools/client/inspector/events/components/EventsApp.js
+++ /dev/null
@@ -1,25 +0,0 @@
-/* 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";
-
-const { PureComponent } = require("devtools/client/shared/vendor/react");
-const dom = require("devtools/client/shared/vendor/react-dom-factories");
-const { connect } = require("devtools/client/shared/vendor/react-redux");
-
-class EventsApp extends PureComponent {
-  static get propTypes() {
-    return {};
-  }
-
-  render() {
-    return dom.div(
-      {
-        id: "events-container",
-      }
-    );
-  }
-}
-
-module.exports = connect(state => state)(EventsApp);

deleted file mode 100644
--- a/devtools/client/inspector/events/components/moz.build
+++ /dev/null
@@ -1,9 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# 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/.
-
-DevToolsModules(
-    'EventsApp.js',
-)

deleted file mode 100644
--- a/devtools/client/inspector/events/events.js
+++ /dev/null
@@ -1,50 +0,0 @@
-/* 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";
-
-const { createFactory, createElement } = require("devtools/client/shared/vendor/react");
-const { Provider } = require("devtools/client/shared/vendor/react-redux");
-
-const EventsApp = createFactory(require("./components/EventsApp"));
-
-const { LocalizationHelper } = require("devtools/shared/l10n");
-const INSPECTOR_L10N =
-  new LocalizationHelper("devtools/client/locales/inspector.properties");
-
-class EventsView {
-  constructor(inspector, window) {
-    this.document = window.document;
-    this.inspector = inspector;
-    this.store = inspector.store;
-
-    this.init();
-  }
-
-  init() {
-    if (!this.inspector) {
-      return;
-    }
-
-    let eventsApp = EventsApp({});
-
-    let provider = createElement(Provider, {
-      id: "eventsview",
-      key: "eventsview",
-      store: this.store,
-      title: INSPECTOR_L10N.getStr("inspector.sidebar.eventsViewTitle")
-    }, eventsApp);
-
-    // Expose the provider to let inspector.js use it in setupSidebar.
-    this.provider = provider;
-  }
-
-  destroy() {
-    this.document = null;
-    this.inspector = null;
-    this.store = null;
-  }
-}
-
-module.exports = EventsView;

deleted file mode 100644
--- a/devtools/client/inspector/events/moz.build
+++ /dev/null
@@ -1,15 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# 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/.
-
-DIRS += [
-    'actions',
-    'components',
-    'reducers',
-]
-
-DevToolsModules(
-    'events.js',
-)

deleted file mode 100644
--- a/devtools/client/inspector/events/reducers/events.js
+++ /dev/null
@@ -1,19 +0,0 @@
-/* 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";
-
-const INITIAL_EVENTS = [];
-
-let reducers = {
-
-};
-
-module.exports = function(events = INITIAL_EVENTS, action) {
-  let reducer = reducers[action.type];
-  if (!reducer) {
-    return events;
-  }
-  return reducer(events, action);
-};

deleted file mode 100644
--- a/devtools/client/inspector/events/reducers/index.js
+++ /dev/null
@@ -1,7 +0,0 @@
-/* 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";
-
-exports.events = require("./events");

deleted file mode 100644
--- a/devtools/client/inspector/events/reducers/moz.build
+++ /dev/null
@@ -1,10 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# 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/.
-
-DevToolsModules(
-    'events.js',
-    'index.js',
-)

--- a/devtools/client/inspector/inspector.js
+++ b/devtools/client/inspector/inspector.js
@@ -816,68 +816,16 @@ Inspector.prototype = {
     // Rules, Layout, Computed, etc.
     if (this.show3PaneToggle) {
       this.sidebar.addExistingTab(
         "computedview",
         INSPECTOR_L10N.getStr("inspector.sidebar.computedViewTitle"),
         defaultTab == "computedview");
     }
 
-    if (Services.prefs.getBoolPref("devtools.changesview.enabled")) {
-      // Inject a lazy loaded react tab by exposing a fake React object
-      // with a lazy defined Tab thanks to `panel` being a function
-      let changesId = "changesview";
-      let changesTitle = INSPECTOR_L10N.getStr("inspector.sidebar.changesViewTitle");
-      this.sidebar.addTab(
-        changesId,
-        changesTitle,
-        {
-          props: {
-            id: changesId,
-            title: changesTitle
-          },
-          panel: () => {
-            if (!this.changesview) {
-              const ChangesView =
-                this.browserRequire("devtools/client/inspector/changes/changes");
-              this.changesview = new ChangesView(this, this.panelWin);
-            }
-
-            return this.changesview.provider;
-          }
-        },
-        defaultTab == changesId);
-    }
-
-    if (Services.prefs.getBoolPref("devtools.eventsview.enabled")) {
-      // Inject a lazy loaded react tab by exposing a fake React object
-      // with a lazy defined Tab thanks to `panel` being a function
-      let eventsId = "eventsview";
-      let eventsTitle = INSPECTOR_L10N.getStr("inspector.sidebar.eventsViewTitle");
-      this.sidebar.addTab(
-        eventsId,
-        eventsTitle,
-        {
-          props: {
-            id: eventsId,
-            title: eventsTitle
-          },
-          panel: () => {
-            if (!this.eventview) {
-              const EventsView =
-                this.browserRequire("devtools/client/inspector/events/events");
-              this.eventsview = new EventsView(this, this.panelWin);
-            }
-
-            return this.eventsview.provider;
-          }
-        },
-        defaultTab == eventsId);
-    }
-
     if (this.target.form.animationsActor) {
       const animationTitle =
         INSPECTOR_L10N.getStr("inspector.sidebar.animationInspectorTitle");
 
       if (Services.prefs.getBoolPref("devtools.new-animationinspector.enabled")) {
         const animationId = "newanimationinspector";
 
         this.sidebar.addTab(

--- a/devtools/client/inspector/moz.build
+++ b/devtools/client/inspector/moz.build
@@ -1,20 +1,18 @@
 # 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/.
 
 DIRS += [
     'animation',
     'animation-old',
     'boxmodel',
-    'changes',
     'components',
     'computed',
-    'events',
     'extensions',
     'flexbox',
     'fonts',
     'grids',
     'layout',
     'markup',
     'rules',
     'shared'

--- a/devtools/client/inspector/reducers.js
+++ b/devtools/client/inspector/reducers.js
@@ -4,17 +4,15 @@
 
 "use strict";
 
 // This file exposes the Redux reducers of the box model, grid and grid highlighter
 // settings.
 
 exports.animations = require("devtools/client/inspector/animation/reducers/animations");
 exports.boxModel = require("devtools/client/inspector/boxmodel/reducers/box-model");
-exports.changes = require("devtools/client/inspector/changes/reducers/changes");
-exports.events = require("devtools/client/inspector/events/reducers/events");
 exports.extensionsSidebar = require("devtools/client/inspector/extensions/reducers/sidebar");
 exports.flexbox = require("devtools/client/inspector/flexbox/reducers/flexbox");
 exports.fontOptions = require("devtools/client/inspector/fonts/reducers/font-options");
 exports.fontData = require("devtools/client/inspector/fonts/reducers/fonts");
 exports.fontEditor = require("devtools/client/inspector/fonts/reducers/font-editor");
 exports.grids = require("devtools/client/inspector/grids/reducers/grids");
 exports.highlighterSettings = require("devtools/client/inspector/grids/reducers/highlighter-settings");

--- a/devtools/client/locales/en-US/inspector.properties
+++ b/devtools/client/locales/en-US/inspector.properties
@@ -400,26 +400,16 @@ inspector.sidebar.computedViewTitle=Comp
 # that corresponds to the tool displaying layout information defined in the page.
 inspector.sidebar.layoutViewTitle2=Layout
 
 # LOCALIZATION NOTE (inspector.sidebar.newBadge):
 # This is the text of a promotion badge showed in the inspector sidebar, next to a panel
 # name. Used to promote new/recent panels such as the layout panel.
 inspector.sidebar.newBadge=new!
 
-# LOCALIZATION NOTE (inspector.sidebar.changesViewTitle):
-# This is the title shown in a tab in the side panel of the Inspector panel
-# that corresponds to the tool displaying CSS changes.
-inspector.sidebar.changesViewTitle=Changes
-
-# LOCALIZATION NOTE (inspector.sidebar.eventsViewTitle):
-# This is the title shown in a tab in the side panel of the Inspector panel
-# that corresponds to the tool displaying the list of event listeners used in the page.
-inspector.sidebar.eventsViewTitle=Events
-
 # LOCALIZATION NOTE (inspector.sidebar.animationInspectorTitle):
 # This is the title shown in a tab in the side panel of the Inspector panel
 # that corresponds to the tool displaying animations defined in the page.
 inspector.sidebar.animationInspectorTitle=Animations
 
 # LOCALIZATION NOTE (inspector.eyedropper.label): A string displayed as the tooltip of
 # a button in the inspector which toggles the Eyedropper tool
 inspector.eyedropper.label=Grab a color from the page

--- a/devtools/client/preferences/devtools-client.js
+++ b/devtools/client/preferences/devtools-client.js
@@ -64,20 +64,16 @@ pref("devtools.inspector.imagePreviewToo
 // Enable user agent style inspection in rule-view
 pref("devtools.inspector.showUserAgentStyles", false);
 // Show all native anonymous content (like controls in <video> tags)
 pref("devtools.inspector.showAllAnonymousContent", false);
 // Enable the Flexbox highlighter
 pref("devtools.inspector.flexboxHighlighter.enabled", false);
 // Enable the CSS shapes highlighter
 pref("devtools.inspector.shapesHighlighter.enabled", true);
-// Enable the Changes View
-pref("devtools.changesview.enabled", false);
-// Enable the Events View
-pref("devtools.eventsview.enabled", false);
 // Enable the Flexbox Inspector panel
 pref("devtools.flexboxinspector.enabled", false);
 // Enable the new Animation Inspector in Nightly only
 #if defined(NIGHTLY_BUILD)
 pref("devtools.new-animationinspector.enabled", true);
 #else
 pref("devtools.new-animationinspector.enabled", false);
 #endif