diff --git a/inpage-toolbar-ui/README.md b/inpage-toolbar-ui/README.md
deleted file mode 100644
index 29d5b80..0000000
--- a/inpage-toolbar-ui/README.md
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@@ -1,27 +0,0 @@
-# inpage-toolbar-ui
-
-## What it does ##
-
-The extension includes:
-
-* a browser action which enables/disables the in-page toolbar
-* a content script which creates/removes the in-page toolbar iframe
-* the toolbar ui resources, packaged as web accessible resources
-
-When the user clicks the browser action button, a toolbar is shown/hidden
-in the current web page.
-
-The toolbar UI is packaged in the add-on resources, exposed to the current
-web page as a web accessible resource and injected into the page by the
-content script by creating and injecting into the page an iframe which
-points to the toolbar UI page.
-
-## What it shows ##
-
-How to expose an in-page toolbar UI by creating an iframe:
-
-* use web accessible resources to enable web pages to load packaged content
-* use a content script to create and inject in a web page an iframe which points to the
-  packaged content
-* use the same API enabled in content scripts (but from the add-on iframe)
-  to exchange messages directly with the add-on background page
diff --git a/inpage-toolbar-ui/background.js b/inpage-toolbar-ui/background.js
deleted file mode 100644
index 49aab61..0000000
--- a/inpage-toolbar-ui/background.js
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@@ -1,17 +0,0 @@
-// Send a message to the current tab's content script.
-function toggleToolbar() {
-  chrome.tabs.query({ active: true, currentWindow: true }, function(tabs) {
-    chrome.tabs.sendMessage(tabs[0].id, "toggle-in-page-toolbar");
-  });
-}
-
-// Handle the browser action button.
-chrome.browserAction.onClicked.addListener(toggleToolbar);
-
-// Handle connections received from the add-on toolbar ui iframes.
-chrome.runtime.onConnect.addListener(function (port) {
-  if (port.sender.url == chrome.runtime.getURL("toolbar/ui.html")) {
-    // Handle port messages received from the connected toolbar ui frames.
-    port.onMessage.addListener(toggleToolbar);
-  }
-});
diff --git a/inpage-toolbar-ui/contentscript.js b/inpage-toolbar-ui/contentscript.js
deleted file mode 100644
index e99e84e..0000000
--- a/inpage-toolbar-ui/contentscript.js
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-var toolbarUI;
-
-// Create the toolbar ui iframe and inject it in the current page
-function initToolbar() {
-  var iframe = document.createElement("iframe");
-  iframe.setAttribute("src", chrome.runtime.getURL("toolbar/ui.html"));
-  iframe.setAttribute("style", "position: fixed; top: 0; left: 0; z-index: 10000; width: 100%; height: 36px;");
-  document.body.appendChild(iframe);
-
-  return toolbarUI = {
-    iframe: iframe, visible: true
-  };
-}
-
-function toggleToolbar(toolbarUI) {
-  if (toolbarUI.visible) {
-    toolbarUI.visible = false;
-    toolbarUI.iframe.style["display"] = "none";
-  } else {
-    toolbarUI.visible = true;
-    toolbarUI.iframe.style["display"] = "block";
-  }
-}
-
-// Handle messages from the add-on background page (only in top level iframes)
-if (window.parent == window) {
-  chrome.runtime.onMessage.addListener(function(msg) {
-    if (msg == "toggle-in-page-toolbar") {
-      if (toolbarUI) {
-        toggleToolbar(toolbarUI);
-      } else {
-        toolbarUI = initToolbar();
-      }
-    }
-  });
-}
diff --git a/inpage-toolbar-ui/icons/32.png b/inpage-toolbar-ui/icons/32.png
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diff --git a/inpage-toolbar-ui/icons/48.png b/inpage-toolbar-ui/icons/48.png
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diff --git a/inpage-toolbar-ui/manifest.json b/inpage-toolbar-ui/manifest.json
deleted file mode 100644
index c0fe3f7..0000000
--- a/inpage-toolbar-ui/manifest.json
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@@ -1,40 +0,0 @@
-{
-  "description": "Adds a browser action icon to the toolbar. Click the button to inject an in-page toolbar UI into the current webpage. See https://developer.mozilla.org/en-US/Add-ons/WebExtensions/Examples#inpage-toolbar-ui",
-  "manifest_version": 2,
-  "name": "In Page Toolbar UI",
-  "version": "1.0",
-  "homepage_url": "https://github.com/mdn/webextensions-examples/tree/master/inpage-toolbar-ui",
-  "icons": {
-    "48": "icons/48.png"
-  },
-
-  "permissions": [],
-
-  "background": {
-    "scripts": ["background.js"]
-  },
-
-  "browser_action": {
-    "default_icon": "icons/32.png",
-    "default_title": "In Page Toolbar"
-  },
-
-  "content_scripts": [
-    {
-      "js": ["contentscript.js"],
-      "run_at": "document_idle",
-      "matches": ["<all_urls>"]
-    }
-  ],
-
-  "web_accessible_resources": [
-    "toolbar/ui.html"
-  ],
-
-  "applications": {
-    "gecko": {
-      "id": "inpage-toolbar-ui@mozilla.org",
-      "strict_min_version": "46.0"
-    }
-  }
-}
diff --git a/inpage-toolbar-ui/toolbar/ui.css b/inpage-toolbar-ui/toolbar/ui.css
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--- a/inpage-toolbar-ui/toolbar/ui.css
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-body {
-  overflow: hidden;
-  color: black;
-  background: rgba(255,255,255,0.9);
-}
-
-#rainbow {
-  background: linear-gradient(0deg, rgba(217,26,18,0.70) 15%, rgba(225,51,0,0.70) 15%, rgba(255, 127, 20, 0.70) 16%, rgba(242, 171, 3, 0.70) 32%, rgba(235, 192, 0, 0.70) 32%, rgba(250, 222, 0, 0.70) 33%, rgba(239, 255, 3, 0.70) 48%, rgba(86, 252, 2, 0.70) 49%, rgba(82, 255, 1, 0.70) 66%, rgba(74, 222, 126, 0.70) 67%, rgba(59, 170, 242, 0.70) 67%, rgba(59, 170, 242, 0.70) 84%, rgba(115, 55, 247, 0.70) 84%, rgba(107, 64, 242, 0.70) 100%);
-  position: fixed;
-  top: 0;
-  left: 0;
-  width: 100%;
-  height: 6px;
-}
-
-#title {
-  font-weight: bold;
-  font-size: 1em;
-}
-
-.whimsy {
-  width: 36px;
-  height: 36px;
-}
-
-/* Toggle Button. */
-
-#toggle {
-  top: 8px;
-  right: 4px;
-  position: absolute;
-  margin: 0 1em;
-  text-decoration: underline;
-  border-radius: 1em;
-  background: transparent linear-gradient(0deg, rgb(255, 162, 0), rgba(189, 122, 6, 0.66));
-}
-
-/* Annoying animation. */
-
-@keyframes wobbling {
-  50% {
-    transform: translateY(-13px);
-  }
-
-  100% {
-    transform: translateY(0px);
-  }
-}
-
-.wobbling {
-  display: inline-block;
-  vertical-align: middle;
-  transform: translateZ(0);
-  box-shadow: 0 0 1px rgba(0, 0, 0, 0);
-  backface-visibility: hidden;
-
-  animation-name: wobbling;
-  animation-duration: 1.25s;
-  animation-timing-function: linear;
-  animation-iteration-count: infinite;
-  animation-fill-mode: both;
-}
diff --git a/inpage-toolbar-ui/toolbar/ui.html b/inpage-toolbar-ui/toolbar/ui.html
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-<!DOCTYPE html>
-<html>
-  <head>
-    <meta charset="utf-8">
-    <link rel="stylesheet" href="ui.css">
-  </head>
-  <body>
-    <span>
-      <div id="rainbow"></div>
-      <img src="whimsy.png" class="whimsy wobbling">
-      <span id="title" class="wobbling">In-Page "Amazing and super-useful" Toolbar</span>
-    </span>
-    <button id="toggle">toggle</button>
-    <script src="ui.js">
-    </script>
-  </body>
-</html>
diff --git a/inpage-toolbar-ui/toolbar/ui.js b/inpage-toolbar-ui/toolbar/ui.js
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--- a/inpage-toolbar-ui/toolbar/ui.js
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-// Connect to the background page.
-var port = chrome.runtime.connect();
-
-// Handle click events on the toolbar button.
-document.querySelector("#toggle").addEventListener("click", function() {
-  // Ask the background page to toggle the toolbar on the current tab
-  port.postMessage("toggle-in-page-toolbar");
-});
diff --git a/inpage-toolbar-ui/toolbar/whimsy.png b/inpage-toolbar-ui/toolbar/whimsy.png
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