Examine source code of scrollin

{
  "manifest_version": 3,
  "name": "Shorts AutoScroll",
  "version": "1.1.0",
  "description": "Auto-scrolls YouTube Shorts, Instagram Reels, and Facebook Reels when one ends. Includes a custom timer with alarm.",
  "icons": {
    "16": "icons/icon.svg",
    "32": "icons/icon.svg",
    "48": "icons/icon.svg",
    "96": "icons/icon.svg",
    "128": "icons/icon.svg"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon.svg",
      "32": "icons/icon.svg",
      "48": "icons/icon.svg"
    },
    "default_title": "Shorts AutoScroll"
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "*://*.youtube.com/*",
    "*://*.instagram.com/*",
    "*://*.facebook.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://*.instagram.com/*",
        "*://*.facebook.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "assets/timer-face.svg",
        "assets/timer-face-alarm.svg",
        "assets/five-more.svg",
        "assets/times-up.svg",
        "assets/gear.svg",
        "assets/clock.svg",
        "fonts/PlusJakartaSans-Medium.woff2"
      ],
      "matches": [
        "*://*.youtube.com/*",
        "*://*.instagram.com/*",
        "*://*.facebook.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "shorts-autoscroll@local",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}