Examine source code of ElementEditor

{
  "manifest_version": 3,
  "name": "ElementEditor",
  "version": "1.1.1",
  "browser_specific_settings": {
    "gecko": {
      "id": "elementeditor@sunmingcan"
    }
  },
  "description": "强大的网页元素编辑工具，可实时修改任何网页元素，效率极高",
  "icons": {
    "48": "icons/48x48.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "action": {
    "default_icon": {
      "48": "icons/48x48.png"
    },
    "default_title": "ElementEditor",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}