Examine source code of Playlist Guru

{
  "manifest_version": 3,
  "name": "Playlist Guru",
  "version": "1.0.0",
  "description": "Save video and audio links to two independent playlists, detect .m3u8/.mpd/.ism/.flv links on the current page, and play them (HLS, DASH, Smooth Streaming, FLV, MPEG-TS, and every native format) from your own built-in player tab. Includes speed controls, one-click video-to-MP3 audio extraction, and a jump-back-to-source button on every item.",
  "browser_specific_settings": {
    "gecko": {
      "id": "stream-playlist-player@local.ext",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "contextMenus",
    "storage",
    "webRequest",
    "webNavigation",
    "unlimitedStorage",
    "clipboardWrite"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Playlist Guru",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "background": {
    "scripts": [
      "utils.js",
      "background.js"
    ]
  }
}