Examine source code of Threads for YouTube

{
  "manifest_version": 2,
  "name": "Threads for YouTube",
  "short_name": "TFY",
  "version": "0.13.0",
  "description": "Reddit comments on YouTube.",
  "homepage_url": "https://github.com/a-bravo/threads-for-youtube#readme",
  "icons": {
    "16": "icons/icon@16.png",
    "32": "icons/icon@32.png",
    "48": "icons/icon@48.png",
    "96": "icons/icon@96.png",
    "128": "icons/icon@128.png"
  },
  "web_accessible_resources": [
    "images/*.png"
  ],
  "minimum_chrome_version": "43",
  "browser_specific_settings": {
    "gecko": {
      "id": "threads-for-youtube.id@example.com",
      "strict_min_version": "53.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content_script.bundle.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "background": {
    "scripts": [
      "background.bundle.js"
    ]
  },
  "permissions": [
    "storage",
    "https://*.reddit.com/*"
  ],
  "options_ui": {
    "page": "options/index.html",
    "open_in_tab": true
  }
}