Add 48px icon in 'icons' key

chill-out/button/LICENSE

@@ -1 +0,0 @@
-The icon "chillout.png" is taken from the IconBeast Lite iconset, and used under the terms of its license (http://www.iconbeast.com/faq/), with a link back to the website: http://www.iconbeast.com/free/.

chill-out/icons/LICENSE

@@ -0,0 +1,3 @@
+The icon "chillout-32.png" is taken from the IconBeast Lite iconset, and used under the terms of its license (http://www.iconbeast.com/faq/), with a link back to the website: http://www.iconbeast.com/free/.
+
+The icon "chillout-48.png" is taken from Aha-Soft’s Free Retina iconset, and used under the terms of its license (http://www.aha-soft.com/free-icons/free-retina-icon-set/), with a link back to the website: http://www.aha-soft.com/.

chill-out/manifest.json

@@ -1,4 +1,12 @@
 {
+  "manifest_version": 2,
+  "name": "Chill out",
+  "version": "1.0",
+  "description": "Show a page action after a period of inactivity. Show cat gifs when the page action is clicked.",
+  "homepage_url": "https://github.com/mdn/webextensions-examples/tree/master/chill-out",
+  "icons": {
+    "48": "icons/chillout-48.png"
+  },
 
   "manifest_version": 2,
   "name": "chillout-page-action",
@@ -16,7 +24,7 @@
   ],  
 
   "page_action": {
-    "default_icon": "button/chillout.png",
+    "default_icon": "icons/chillout-32.png",
     "default_title": "Chill out"
   },