Examine source code of Youtube Skip Buttons

{
  "name": "Skip",
  "version": "0.1",
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "gopaal.akkineni@gmail.com",
      "strict_min_version": "88.0"
    }
  },
  "permissions": [
    "tabs",
    "webNavigation",
    "scripting",
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "style.css"
      ]
    }
  ],
  "action": {
    "default_popup": "popup.html"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "assets/fast_forward.png",
        "assets/backward.png",
        "assets/camera_.png",
        "buttons.js"
      ],
      "matches": [
        "https://www.youtube.com/*"
      ]
    }
  ]
}