Examine source code of Brainrot - Auto Scroll for Shorts & Reels

{
  "manifest_version": 3,
  "name": "Brainrot",
  "version": "0.1.2",
  "description": "Automatically scrolls short-form videos. No taps. No swipes. Just watch.",
  "icons": {
    "16": "assets/icon-16.png",
    "32": "assets/icon-32.png",
    "48": "assets/icon-48.png",
    "128": "assets/icon-128.png"
  },
  "action": {
    "default_popup": "popup/index.html",
    "default_icon": {
      "16": "assets/icon-16.png",
      "32": "assets/icon-32.png",
      "48": "assets/icon-48.png"
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "scripting"
  ],
  "background": {
    "scripts": [
      "background/index.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*",
        "https://www.facebook.com/*",
        "https://www.tiktok.com/*",
        "https://www.instagram.com/*"
      ],
      "js": [
        "content/index.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://www.youtube.com/*",
        "https://www.facebook.com/*",
        "https://www.tiktok.com/*",
        "https://www.instagram.com/*"
      ],
      "js": [
        "content-main/spoof.js"
      ],
      "run_at": "document_start",
      "world": "MAIN"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "brainrot@brainrot.app",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}