use the 'icons' key for all examples

notify-link-clicks-i18n/LICENSE

@@ -1 +0,0 @@
-The "link.png" icon is taken from the Geomicons iconset, and is used here under the MIT license: http://opensource.org/licenses/MIT.

notify-link-clicks-i18n/background-script.js

@@ -6,7 +6,7 @@ function notify(message) {
   var content = chrome.i18n.getMessage("notificationContent", message.url);
   chrome.notifications.create({
     "type": "basic",
-    "iconUrl": chrome.extension.getURL("link.png"),
+    "iconUrl": chrome.extension.getURL("icons/link-48.png"),
     "title": title,
     "message": content
   });

notify-link-clicks-i18n/icons/LICENSE

@@ -0,0 +1 @@
+The "link-48" and "link-64" icons are taken from the Geomicons iconset, and are used here under the MIT license: http://opensource.org/licenses/MIT.

notify-link-clicks-i18n/manifest.json

@@ -5,6 +5,10 @@
   "description": "__MSG_extensionDescription__",
   "version": "1.0",
   "homepage_url": "https://github.com/mdn/webextensions-examples/tree/master/notify-link-clicks-i18n",
+  "icons": {
+    "48": "icons/link-48.png",
+    "64": "icons/link-64.png"
+  },
 
   "applications": {
     "gecko": {