diff --git a/extension/icon128.png b/extension/icon128.png
new file mode 100644
index 0000000..f4ea805
Binary files /dev/null and b/extension/icon128.png differ
diff --git a/extension/icon16.png b/extension/icon16.png
new file mode 100644
index 0000000..3fb805e
Binary files /dev/null and b/extension/icon16.png differ
diff --git a/extension/icon48.png b/extension/icon48.png
new file mode 100644
index 0000000..a0ee0f3
Binary files /dev/null and b/extension/icon48.png differ
diff --git a/extension/manifest.json b/extension/manifest.json
index afb6a5e..711c3ed 100644
--- a/extension/manifest.json
+++ b/extension/manifest.json
@@ -6,6 +6,11 @@
   "action": {
     "default_popup": "popup.html"
   },
+  "icons": {
+    "16": "icon16.png",
+    "48": "icon48.png",
+    "128": "icon128.png"
+  },
   "content_scripts": [
     {
       "matches": ["*://*/*", "file://*.html"],