diff --git a/page-to-extension-messaging/manifest.json b/page-to-extension-messaging/manifest.json
index 51bdde0..ae13d38 100644
--- a/page-to-extension-messaging/manifest.json
+++ b/page-to-extension-messaging/manifest.json
@@ -2,6 +2,7 @@
 
   "manifest_version": 2,
   "name": "Page to extension messaging",
+  "description": "Visit https://mdn.github.io/webextensions-examples/content-script-page-script-messaging.html for the demo.",
   "version": "1.0",
 
   "applications": {