Examine source code of huythaitets123

{
  "manifest_version": 2,
  "name": "Background Color Changer",
  "version": "1.0",
  "description": "Change the background color of the page.",
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon-16.png",
      "48": "icon-48.png",
      "128": "icon-128.png"
    }
  },
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ce379098-882c-4e2c-a43c-e7b0932e3873}"
    }
  }
}