Examine source code of Independent YouTube Playlist Manager

{
  "name": "Independent YouTube Playlist Manager",
  "short_name": "Playlist Manager",
  "description": "An independent system to create and manage YouTube playlists from open tabs, RSS feeds, and subscriptions with a persistent bottom dock.",
  "version": "1.0.1",
  "manifest_version": 3,
  "icons": {
    "16": "assets/icons/icon_16.png",
    "32": "assets/icons/icon_32.png",
    "48": "assets/icons/icon_48.png",
    "128": "assets/icons/icon_128.png"
  },
  "options_ui": {
    "page": "editor/index.html#/settings",
    "open_in_tab": true
  },
  "action": {
    "default_title": "Independent YouTube Playlist Manager",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background/index.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/watch*"
      ],
      "js": [
        "assets/browser-polyfill.min.js",
        "content-scripts/watch-tracker.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [
    "tabs",
    "storage",
    "notifications",
    "activeTab",
    "contextMenus",
    "identity",
    "scripting",
    "unlimitedStorage",
    "alarms"
  ],
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+Shift+Y",
        "mac": "Alt+Shift+Y"
      },
      "description": "Open Playlist Manager Popup"
    },
    "quick_add_active_video": {
      "suggested_key": {
        "default": "Alt+Shift+A",
        "mac": "Alt+Shift+A"
      },
      "description": "Quick add current YouTube video to Playlist Builder"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "assets/*",
        "editor/*",
        "popup/*"
      ],
      "matches": [
        "*://*/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "independent-yt-playlist-manager@elmusleh.github.io",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}