Examine source code of YouTube Social Feed

{
  "description": "Add a customizable social feed to YouTube, allowing you to follow users and see the videos they've watched directly in your personalized timeline",
  "manifest_version": 2,
  "name": "YouTube Social Feed",
  "version": "1.0",
  "homepage_url": "https://github.com/TheGreatRambler/YoutubeFeed",
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "48": "icon.svg",
    "96": "icon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d2eec88f-acbf-417f-a904-296e96f9b8fc}"
    }
  }
}