diff --git a/extension/_locales/en/messages.json b/extension/_locales/en/messages.json
new file mode 100644
index 000000000..68fb3b3b1
--- /dev/null
+++ b/extension/_locales/en/messages.json
@@ -0,0 +1,10 @@
+{
+  "extName": {
+    "message": "ShinyColors async app script",
+    "description": "Extension name"
+  },
+  "desc": {
+    "message": "Make third-party userscripts load more stable by setting the async attribute on the game's app script",
+    "description": "Extension description"
+  }
+}
\ No newline at end of file
diff --git a/extension/_locales/zh_CN/messages.json b/extension/_locales/zh_CN/messages.json
new file mode 100644
index 000000000..9896d5060
--- /dev/null
+++ b/extension/_locales/zh_CN/messages.json
@@ -0,0 +1,10 @@
+{
+  "extName": {
+    "message": "闪耀色彩异步脚本",
+    "description": "扩展名"
+  },
+  "desc": {
+    "message": "通过给游戏的app脚本设置async属性使第三方用户脚本更稳定的加载",
+    "description": "Extension description"
+  }
+}
\ No newline at end of file
diff --git a/extension/content-script.js b/extension/content-script.js
new file mode 100644
index 000000000..44d45ca4c
--- /dev/null
+++ b/extension/content-script.js
@@ -0,0 +1,22 @@
+const mutationCallback = (mutationsList) => {
+  for (let mutation of mutationsList) {
+    const addedNodes = mutation.addedNodes
+    addedNodes.forEach(node => {
+      if ('SCRIPT' === node.tagName) {
+        if (node.src.includes('shinycolors.enza.fun/app')) {
+          node.async = true
+          observer.disconnect()
+        }
+      }
+    })
+  }
+}
+
+const obConfig = {
+  subtree: true,
+  childList: true
+}
+
+const targetNode = document
+const observer = new MutationObserver(mutationCallback)
+observer.observe(targetNode, obConfig)
\ No newline at end of file
diff --git a/extension/icon.png b/extension/icon.png
new file mode 100644
index 000000000..0f9838654
Binary files /dev/null and b/extension/icon.png differ
diff --git a/extension/manifest.json b/extension/manifest.json
new file mode 100644
index 000000000..c5fd2e2f0
--- /dev/null
+++ b/extension/manifest.json
@@ -0,0 +1,17 @@
+{
+  "name": "__MSG_extName__",
+  "description": "__MSG_desc__",
+  "version": "1.0",
+  "manifest_version": 3,
+  "default_locale": "zh_CN",
+  "content_scripts": [
+    {
+      "matches": ["*://shinycolors.enza.fun/*"],
+      "run_at": "document_start",
+      "js": ["content-script.js"]
+    }
+  ],
+  "icons": {
+    "128": "/icon.png"
+  }
+}
\ No newline at end of file