Examine source code of YouTube Skip Ads

{
  "name": "YouTube Skip Ads",
  "description": "Helps users to skip ads by highlighting the Skip Ad button immediately when advertise begins",
  "version": "3.1.1",
  "manifest_version": 3,
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "main.js"
      ]
    }
  ],
  "action": {
    "default_title": "YouTube Skip Ads",
    "default_popup": "index.html"
  },
  "icons": {
    "16": "16.png",
    "48": "48.png",
    "128": "128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "youtube.skip-ads@leethub.in"
    }
  }
}