fix: CSS showing into XML page (#761)

src/content/commandPalette/index.js

@@ -1,3 +1,4 @@
+import browser from 'webextension-polyfill';
 import initApp from './main';
 import injectAppStyles from '../injectAppStyles';
 
@@ -21,6 +22,14 @@ export default async function () {
     const isMainFrame = window.self === window.top;
     if (!isMainFrame) return;
 
+    const isInvalidURL = /.(json|xml)$/.test(window.location.pathname);
+    if (isInvalidURL) return;
+
+    const { automaShortcut } = await browser.storage.local.get(
+      'automaShortcut'
+    );
+    if (Array.isArray(automaShortcut) && automaShortcut.length === 0) return;
+
     await pageLoaded();
 
     const instanceExist = document.querySelector('automa-palette');