Examine source code of JavaScript Playground

{
  "manifest_version": 3,
  "name": "JavaScript Playground",
  "version": "1.3.1",
  "description": "在浏览器 DevTools 中添加一个 JavaScript Playground 标签页",
  "devtools_page": "devtools.html",
  "update_url": "https://github.com/gexiaowei/js-playground-extension/releases/latest/download/updates.xml",
  "icons": {
    "16": "icons/logo-16.png",
    "32": "icons/logo-32.png",
    "48": "icons/logo-48.png",
    "96": "icons/logo-96.png",
    "128": "icons/logo-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "javascript-playground@chaibai.com.cn",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "permissions": [
    "activeTab"
  ]
}