Examine source code of YT Long Playlist

{
  "manifest_version": 2,
  "name": "YT Long Playlist",
  "version": "1.9.0",
  "description": "Fix: Start/Next/Prev sync, remove underline for unseen links, restore resizable panel, keep other parts untouched.",
  "permissions": [
    "storage",
    "https://www.youtube.com/*",
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "yt-long-playlist-public@addon.com",
      "data_collection_permissions": {
        "collects_data": false,
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "48": "icon48.png",
    "96": "icon96.png",
    "128": "icon128.png"
  }
}