diff --git a/webextension/manifest.json b/webextension/manifest.json
index cf87aef..051918d 100644
--- a/webextension/manifest.json
+++ b/webextension/manifest.json
@@ -5,9 +5,7 @@
   "description": "Visit https://mdn.github.io/webextensions-examples/content-script-page-script-messaging.html for the demo. See https://developer.mozilla.org/en-US/Add-ons/WebExtensions/Examples#page-to-extension-messaging",
   "version": "1.0",
   "homepage_url": "https://github.com/mdn/webextensions-examples/tree/master/page-to-extension-messaging",
-  "icons": {
-    "48": "icons/message-48.png"
-  },
+  "icons": {},
 
   "content_scripts": [
     {