Examine source code of BrownDust 2 News Reader

{
  "manifest_version": 3,
  "name": "__MSG_appName__",
  "default_locale": "ja",
  "version": "1.2",
  "description": "__MSG_appDesc__",
  "icons": {
    "16": "icons/morpeah16.png",
    "32": "icons/morpeah32.png",
    "48": "icons/morpeah48.png",
    "128": "icons/morpeah128.png"
  },
  "permissions": [],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {},
  "content_scripts": [
    {
      "matches": [
        "https://www.browndust2.com/*/news",
        "https://www.browndust2.com/*/news?*",
        "https://www.browndust2.com/*/news/view",
        "https://www.browndust2.com/*/news/view?*"
      ],
      "css": [
        "content.css"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "icons/morpeah32.png"
      ],
      "matches": [
        "https://www.browndust2.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "bd2-news-reader@antigravity.local",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}