Examine source code of Graylog JSON Prettify

{
  "manifest_version": 3,
  "name": "Graylog JSON Prettify",
  "version": "1.0.2",
  "description": "__MSG_appDescription__",
  "default_locale": "en",
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "Graylog JSON Prettify"
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "graylog-json-prettify@cheack",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}