diff --git a/manifest.json b/manifest.json
new file mode 100644
index 0000000..0ac49ee
--- /dev/null
+++ b/manifest.json
@@ -0,0 +1,21 @@
+{
+  "manifest_version": 3,
+  "name": "Site Utility Collection",
+  "version": "1",
+  "description": "Improves bad sites",
+  "content_scripts": [
+    {
+      "matches": ["*://www.gooroom.kr/content/downloads/*"],
+      "css": ["content/gooroom.css"],
+      "js": ["content/gooroom.js"]
+    }
+  ],
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "siteutilcoll@user254.kr",
+      "data_collection_permissions": {
+        "required": ["none"]
+      }
+    }
+  }
+}
\ No newline at end of file