Examine source code of YouTube Playlist Creator

{
  "manifest_version": 2,
  "name": "YouTube Playlist Maker",
  "version": "1.1",
  "description": "Create and share YouTube playlists without needing an account",
  "icons": {
    "16": "icons/Lister-16.png",
    "32": "icons/Lister-32.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*"
      ],
      "js": [
        "/content_scripts/content.js"
      ]
    }
  ],
  "permissions": [
    "contextMenus",
    "tabs",
    "activeTab",
    "clipboardWrite",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/Lister-large.png",
    "default_title": "YouTube Playlist Maker",
    "default_popup": "popup/playlist.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{996458be-73bb-4659-8533-04759cf5ff82}"
    }
  }
}