Examine source code of YouTube SegShuffle

{
  "manifest_version": 3,
  "author": "DylanLiu",
  "developer": {
    "name": "DylanLiu",
    "url": "https://github.com/DylanLiu-dev"
  },
  "homepage_url": "https://github.com/DylanLiu-dev/SegShuffle",
  "name": "YouTube SegShuffle",
  "short_name": "SegShuffle",
  "version": "1.1.3",
  "description": "Shuffle-loop your favorite YouTube video through parts or segments defined by start and end timestamps.",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "host_permissions": [
    "*://www.youtube.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "YouTube SegShuffle"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "img/icon-16.png",
    "32": "img/icon.png",
    "48": "img/icon-48.png",
    "64": "img/icon@2x.png",
    "96": "img/icon-96.png",
    "128": "img/icon-128.png"
  },
  "commands": {
    "previous-segment": {
      "suggested_key": {
        "default": "Ctrl+Shift+Comma"
      },
      "description": "Go to previous segment"
    },
    "next-segment": {
      "suggested_key": {
        "default": "Ctrl+Shift+Period"
      },
      "description": "Go to next segment"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "youtube-segshuffle@extension.local",
      "strict_min_version": "109.0"
    }
  }
}