diff --git a/devtools/client/locales/en-US/responsiveUI.properties b/devtools/client/locales/en-US/responsiveUI.properties
index 5a2f41a5694c..6a4930246175 100644
--- a/devtools/client/locales/en-US/responsiveUI.properties
+++ b/devtools/client/locales/en-US/responsiveUI.properties
@@ -11,6 +11,7 @@
 # A good criteria is the language in which you'd find the best
 # documentation on web development on the web.
 
+
 # LOCALIZATION NOTE  (responsiveUI.rotate2): tooltip of the rotate button.
 responsiveUI.rotate2=Rotate
 
@@ -66,13 +67,3 @@ responsiveUI.notificationReload=Reload
 responsiveUI.notificationReload_accesskey=R
 responsiveUI.dontShowReloadNotification=Never show again
 responsiveUI.dontShowReloadNotification_accesskey=N
-
-# LOCALIZATION NOTE (responsiveUI.newVersionUserDisabled): notification that appears
-# when old RDM is displayed because the user has disabled new RDM.
-responsiveUI.newVersionUserDisabled=A new version of Responsive Design Mode is available, but it appears to be disabled.  Please enable it and provide feedback, as this version will be removed.
-# LOCALIZATION NOTE (responsiveUI.newVersionE10sDisabled): notification that appears
-# when old RDM is displayed because e10s is disabled.
-responsiveUI.newVersionE10sDisabled=A new version of Responsive Design Mode is available, but it requires multi-process mode, which is currently disabled.  Please enable it and provide feedback, as this version will be removed.
-# LOCALIZATION NOTE (responsiveUI.newVersionEnableAndRestart): button text in notification
-# to enable new RDM itself or e10s as a prerequisite for new RDM.
-responsiveUI.newVersionEnableAndRestart=Enable and Restart
\ No newline at end of file
diff --git a/devtools/client/responsivedesign/responsivedesign.jsm b/devtools/client/responsivedesign/responsivedesign.jsm
index b4288bba5273..57da28464b44 100644
--- a/devtools/client/responsivedesign/responsivedesign.jsm
+++ b/devtools/client/responsivedesign/responsivedesign.jsm
@@ -14,8 +14,6 @@ const EventEmitter = require("devtools/shared/event-emitter");
 
 loader.lazyImporter(this, "SystemAppProxy",
                     "resource://gre/modules/SystemAppProxy.jsm");
-loader.lazyImporter(this, "BrowserUtils",
-                    "resource://gre/modules/BrowserUtils.jsm");
 loader.lazyRequireGetter(this, "Telemetry", "devtools/client/shared/telemetry");
 loader.lazyRequireGetter(this, "showDoorhanger",
                          "devtools/client/shared/doorhanger", true);
@@ -29,12 +27,9 @@ loader.lazyRequireGetter(this, "DebuggerClient",
                          "devtools/shared/client/main", true);
 loader.lazyRequireGetter(this, "DebuggerServer",
                          "devtools/server/main", true);
-loader.lazyRequireGetter(this, "system", "devtools/shared/system");
 
 this.EXPORTED_SYMBOLS = ["ResponsiveUIManager"];
 
-const NEW_RDM_ENABLED = "devtools.responsive.html.enabled";
-
 const MIN_WIDTH = 50;
 const MIN_HEIGHT = 50;
 
@@ -141,7 +136,7 @@ EventEmitter.decorate(Manager);
 // the new HTML RDM UI to function), delegate the ResponsiveUIManager API over to that
 // tool instead.  Performing this delegation here allows us to contain the pref check to a
 // single place.
-if (Services.prefs.getBoolPref(NEW_RDM_ENABLED) &&
+if (Services.prefs.getBoolPref("devtools.responsive.html.enabled") &&
     Services.appinfo.browserTabsRemoteAutostart) {
   let { ResponsiveUIManager } =
     require("devtools/client/responsive.html/manager");
@@ -271,8 +266,6 @@ ResponsiveUI.prototype = {
       anchor: this.chromeDoc.querySelector("#content")
     });
 
-    this.showNewUINotification();
-
     // Notify that responsive mode is on.
     this._telemetry.toolOpened("responsive");
     ResponsiveUIManager.emit("on", { tab: this.tab });
@@ -412,8 +405,6 @@ ResponsiveUI.prototype = {
       yield stopped;
     }
 
-    this.hideNewUINotification();
-
     this.inited = null;
     ResponsiveUIManager.emit("off", { tab: this.tab });
   }),
@@ -692,66 +683,6 @@ ResponsiveUI.prototype = {
     this.container.appendChild(bottomToolbar);
   },
 
-  showNewUINotification() {
-    let nbox = this.mainWindow.gBrowser.getNotificationBox(this.browser);
-
-    // One reason we might be using old RDM is that the user explcitly disabled new RDM.
-    // We should encourage them to use the new one, since the old one will be removed.
-    if (Services.prefs.prefHasUserValue(NEW_RDM_ENABLED) &&
-        !Services.prefs.getBoolPref(NEW_RDM_ENABLED)) {
-      let buttons = [{
-        label: this.strings.GetStringFromName("responsiveUI.newVersionEnableAndRestart"),
-        callback: () => {
-          Services.prefs.setBoolPref(NEW_RDM_ENABLED, true);
-          BrowserUtils.restartApplication();
-        },
-      }];
-      nbox.appendNotification(
-        this.strings.GetStringFromName("responsiveUI.newVersionUserDisabled"),
-        "responsive-ui-new-version-user-disabled",
-        null,
-        nbox.PRIORITY_INFO_LOW,
-        buttons
-      );
-      return;
-    }
-
-    // Only show a notification about the new RDM UI on channels where there is an e10s
-    // switch in the preferences UI (Dev. Ed, Nightly).  On other channels, it is less
-    // clear how a user would proceed here, so don't show a message.
-    if (!system.constants.E10S_TESTING_ONLY) {
-      return;
-    }
-
-    let buttons = [{
-      label: this.strings.GetStringFromName("responsiveUI.newVersionEnableAndRestart"),
-      callback: () => {
-        Services.prefs.setBoolPref("browser.tabs.remote.autostart", true);
-        Services.prefs.setBoolPref("browser.tabs.remote.autostart.2", true);
-        BrowserUtils.restartApplication();
-      },
-    }];
-    nbox.appendNotification(
-      this.strings.GetStringFromName("responsiveUI.newVersionE10sDisabled"),
-      "responsive-ui-new-version-e10s-disabled",
-      null,
-      nbox.PRIORITY_INFO_LOW,
-      buttons
-    );
-  },
-
-  hideNewUINotification() {
-    let nbox = this.mainWindow.gBrowser.getNotificationBox(this.browser);
-    let n = nbox.getNotificationWithValue("responsive-ui-new-version-user-disabled");
-    if (n) {
-      n.close();
-    }
-    n = nbox.getNotificationWithValue("responsive-ui-new-version-e10s-disabled");
-    if (n) {
-      n.close();
-    }
-  },
-
   /**
    * Validate and apply any user input on the editable menulist
    */