--- a/browser/base/content/browser-sets.inc
+++ b/browser/base/content/browser-sets.inc
@@ -43,7 +43,6 @@
     <command id="View:PageSource" oncommand="BrowserViewSource(window.gBrowser.selectedBrowser);" observes="canViewSource"/>
     <command id="View:PageInfo" oncommand="BrowserPageInfo();"/>
     <command id="View:FullScreen" oncommand="BrowserFullScreen();"/>
-    <command id="View:ReaderView" oncommand="ReaderParent.toggleReaderMode(event);"/>
     <command id="cmd_find"
              oncommand="gFindBar.onFindCommand();"
              observes="isImage"/>
@@ -283,7 +282,6 @@
     <key id="key_fullScreen_old" key="&fullScreenCmd.macCommandKey;" command="View:FullScreen" modifiers="accel,shift"/>
     <key keycode="VK_F11" command="View:FullScreen"/>
 #endif
-    <key id="toggleReaderMode" key="&toggleReaderMode.key;" command="View:ReaderView" modifiers="accel,alt" disabled="true"/>
     <key key="&reloadCmd.commandkey;" command="Browser:Reload" modifiers="accel" id="key_reload"/>
     <key key="&reloadCmd.commandkey;" command="Browser:ReloadSkipCache" modifiers="accel,shift"/>
     <key id="key_viewSource" key="&pageSourceCmd.commandkey;" command="View:PageSource" modifiers="accel"/>
--- a/browser/base/content/browser.js
+++ b/browser/base/content/browser.js
@@ -37,8 +37,6 @@ Cu.import("resource://gre/modules/NotificationDB.jsm");
   ["PrivateBrowsingUtils", "resource://gre/modules/PrivateBrowsingUtils.jsm"],
   ["ProcessHangMonitor", "resource:///modules/ProcessHangMonitor.jsm"],
   ["PromiseUtils", "resource://gre/modules/PromiseUtils.jsm"],
-  ["ReaderMode", "resource://gre/modules/ReaderMode.jsm"],
-  ["ReaderParent", "resource:///modules/ReaderParent.jsm"],
   ["RecentWindow", "resource:///modules/RecentWindow.jsm"],
   ["SessionStore", "resource:///modules/sessionstore/SessionStore.jsm"],
   ["ShortcutUtils", "resource://gre/modules/ShortcutUtils.jsm"],
@@ -4579,7 +4577,6 @@ var XULBrowserWindow = {
       }
     }
     UpdateBackForwardCommands(gBrowser.webNavigation);
-    ReaderParent.updateReaderButton(gBrowser.selectedBrowser);
 
     gGestureSupport.restoreRotationState();
 
@@ -4880,9 +4877,6 @@ var TabsProgressListener = {
     // Filter out location changes caused by anchor navigation
     // or history.push/pop/replaceState.
     if (aFlags & Ci.nsIWebProgressListener.LOCATION_CHANGE_SAME_DOCUMENT) {
-      // Reader mode actually cares about these:
-      let mm = gBrowser.selectedBrowser.messageManager;
-      mm.sendAsyncMessage("Reader:PushState", {isArticle: gBrowser.selectedBrowser.isArticle});
       return;
     }
 
--- a/browser/base/content/browser.xul
+++ b/browser/base/content/browser.xul
@@ -759,10 +759,6 @@
                        hidden="true"
                        tooltiptext="&pageReportIcon.tooltip;"
                        onmousedown="gPopupBlockerObserver.onReportButtonMousedown(event);"/>
-                <image id="reader-mode-button"
-                       class="urlbar-icon"
-                       hidden="true"
-                       onclick="ReaderParent.buttonClick(event);"/>
                 <toolbarbutton id="urlbar-zoom-button"
                        onclick="FullZoom.reset();"
                        tooltiptext="&urlbar.zoomReset.tooltip;"
--- a/browser/base/content/urlbarBindings.xml
+++ b/browser/base/content/urlbarBindings.xml
@@ -184,11 +184,6 @@ file, You can obtain one at http://mozilla.org/MPL/2.0/.
                 break;
               }
             }
-          } else {
-            let originalUrl = ReaderMode.getOriginalUrl(aValue);
-            if (originalUrl) {
-              returnValue = originalUrl;
-            }
           }
 
           // Set the actiontype only if the user is not overriding actions.
@@ -773,12 +768,6 @@ file, You can obtain one at http://mozilla.org/MPL/2.0/.
               return selectedVal;
           }
 
-          // Avoid copying 'about:reader?url=', and always provide the original URI:
-          let readerOriginalURL = ReaderMode.getOriginalUrl(uri.spec);
-          if (readerOriginalURL) {
-            uri = uriFixup.createFixupURI(readerOriginalURL, Ci.nsIURIFixup.FIXUP_FLAG_NONE);
-          }
-
           // Only copy exposable URIs
           try {
             uri = uriFixup.createExposableURI(uri);
--- a/browser/components/nsBrowserGlue.js
+++ b/browser/components/nsBrowserGlue.js
@@ -53,7 +53,6 @@ XPCOMUtils.defineLazyServiceGetter(this, "AlertsService", "@mozilla.org/alerts-s
   ["PluralForm", "resource://gre/modules/PluralForm.jsm"],
   ["PrivateBrowsingUtils", "resource://gre/modules/PrivateBrowsingUtils.jsm"],
   ["ProcessHangMonitor", "resource:///modules/ProcessHangMonitor.jsm"],
-  ["ReaderParent", "resource:///modules/ReaderParent.jsm"],
   ["RecentWindow", "resource:///modules/RecentWindow.jsm"],
   ["RemotePrompt", "resource:///modules/RemotePrompt.jsm"],
   ["SelfSupportBackend", "resource:///modules/SelfSupportBackend.jsm"],
@@ -685,7 +684,6 @@ BrowserGlue.prototype = {
     ContentPrefServiceParent.init();
 
     LoginManagerParent.init();
-    ReaderParent.init();
     URLBarZoom.init();
 
     SelfSupportBackend.init();
--- a/browser/components/uitour/UITour-lib.js
+++ b/browser/components/uitour/UITour-lib.js
@@ -297,14 +297,6 @@ if (typeof Mozilla == 'undefined') {
     });
   };
 
-  Mozilla.UITour.forceShowReaderIcon = function() {
-    _sendEvent('forceShowReaderIcon');
-  };
-
-  Mozilla.UITour.toggleReaderMode = function() {
-    _sendEvent('toggleReaderMode');
-  };
-
   Mozilla.UITour.openPreferences = function(pane) {
     _sendEvent('openPreferences', {
       pane: pane
--- a/browser/components/uitour/UITour.jsm
+++ b/browser/components/uitour/UITour.jsm
@@ -32,19 +32,13 @@ XPCOMUtils.defineLazyModuleGetter(this, "BrowserUITelemetry",
   "resource:///modules/BrowserUITelemetry.jsm");
 XPCOMUtils.defineLazyModuleGetter(this, "PrivateBrowsingUtils",
   "resource://gre/modules/PrivateBrowsingUtils.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "ReaderMode",
-  "resource://gre/modules/ReaderMode.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "ReaderParent",
-  "resource:///modules/ReaderParent.jsm");
 
 // See LOG_LEVELS in Console.jsm. Common examples: "All", "Info", "Warn", & "Error".
 const PREF_LOG_LEVEL      = "browser.uitour.loglevel";
 const PREF_SEENPAGEIDS    = "browser.uitour.seenPageIDs";
-const PREF_READERVIEW_TRIGGER = "browser.uitour.readerViewTrigger";
 const PREF_SURVEY_DURATION = "browser.uitour.surveyDuration";
 
 const BACKGROUND_PAGE_ACTIONS_ALLOWED = new Set([
-  "forceShowReaderIcon",
   "getConfiguration",
   "getTreatmentTag",
   "hideHighlight",
@@ -161,7 +155,6 @@ this.UITour = {
     }],
     ["privateWindow",  {query: "#privatebrowsing-button"}],
     ["quit",        {query: "#PanelUI-quit"}],
-    ["readerMode-urlBar", {query: "#reader-mode-button"}],
     ["search",      {
       infoPanelOffsetX: 18,
       infoPanelPosition: "after_start",
@@ -297,21 +290,7 @@ this.UITour = {
                                JSON.stringify([...this.seenPageIDs]));
   },
 
-  get _readerViewTriggerRegEx() {
-    delete this._readerViewTriggerRegEx;
-    let readerViewUITourTrigger = Services.prefs.getCharPref(PREF_READERVIEW_TRIGGER);
-    return this._readerViewTriggerRegEx = new RegExp(readerViewUITourTrigger, "i");
-  },
-
   onLocationChange: function(aLocation) {
-    // The ReaderView tour page is expected to run in Reader View,
-    // which disables JavaScript on the page. To get around that, we
-    // automatically start a pre-defined tour on page load (for hysterical
-    // raisins the ReaderView tour is known as "readinglist")
-    let originalUrl = ReaderMode.getOriginalUrl(aLocation);
-    if (this._readerViewTriggerRegEx.test(originalUrl)) {
-      this.startSubTour("readinglist");
-    }
   },
 
   onPageEvent: function(aMessage, aEvent) {
@@ -661,15 +640,10 @@ this.UITour = {
       }
 
       case "forceShowReaderIcon": {
-        ReaderParent.forceShowReaderIcon(browser);
         break;
       }
 
       case "toggleReaderMode": {
-        let targetPromise = this.getTarget(window, "readerMode-urlBar");
-        targetPromise.then(target => {
-          ReaderParent.toggleReaderMode({target: target.node});
-        });
         break;
       }
 
@@ -1947,12 +1921,8 @@ this.UITour = {
       return;
     }
 
-    if (aFeature == "readinglist") {
-      ReaderParent.showReaderModeInfoPanel(browser);
-    } else {
-      log.error("startSubTour: Unknown feature option specified");
-      return;
-    }
+    log.error("startSubTour: Unknown feature option specified");
+    return;
   },
 
   addNavBarWidget: function (aTarget, aMessageManager, aCallbackID) {
--- a/browser/modules/moz.build
+++ b/browser/modules/moz.build
@@ -35,7 +35,6 @@ EXTRA_JS_MODULES += [
     'PermissionUI.jsm',
     'PluginContent.jsm',
     'ProcessHangMonitor.jsm',
-    'ReaderParent.jsm',
     'RecentWindow.jsm',
     'RemotePrompt.jsm',
     'Sanitizer.jsm',