Examine source code of YDownloadNow – Descargador de vídeo y MP3

{
  "manifest_version": 3,
  "name": "YDownloadNow",
  "version": "0.1.4",
  "description": "Detect and download videos (HLS/DASH/MP4) from almost any site. Fast, local processing — pick the quality and save as MP4.",
  "minimum_chrome_version": "116",
  "icons": {
    "16": "img/icon-16.png",
    "48": "img/icon-48.png",
    "128": "img/icon-128.png"
  },
  "action": {
    "default_title": "YDownloadNow",
    "default_icon": {
      "16": "img/icon-16.png",
      "48": "img/icon-48.png",
      "128": "img/icon-128.png"
    },
    "default_popup": "ui/popup.html"
  },
  "background": {
    "scripts": [
      "background/service-worker.js"
    ],
    "type": "module"
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self'"
  },
  "permissions": [
    "tabs",
    "webRequest",
    "declarativeNetRequest",
    "storage",
    "downloads",
    "contextMenus",
    "notifications"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "run_at": "document_start",
      "world": "MAIN",
      "js": [
        "content/page-hook.js"
      ]
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "run_at": "document_start",
      "world": "ISOLATED",
      "js": [
        "content/hook-inject.js"
      ]
    },
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://*.youtube-nocookie.com/*"
      ],
      "all_frames": true,
      "run_at": "document_end",
      "js": [
        "extractors/youtube.js"
      ]
    },
    {
      "matches": [
        "*://*.instagram.com/*",
        "*://*.tiktok.com/*",
        "*://*.twitter.com/*",
        "*://*.x.com/*",
        "*://*.facebook.com/*",
        "*://*.fb.watch/*",
        "*://*.reddit.com/*",
        "*://*.vimeo.com/*",
        "*://*.dailymotion.com/*",
        "*://dai.ly/*",
        "*://*.twitch.tv/*",
        "*://*.threads.net/*",
        "*://*.streamable.com/*",
        "*://*.rumble.com/*",
        "*://*.odysee.com/*",
        "*://*.bilibili.com/*",
        "*://*.vk.com/*",
        "*://*.ok.ru/*",
        "*://*.kick.com/*",
        "*://*.tumblr.com/*",
        "*://*.pinterest.com/*",
        "*://*.linkedin.com/*"
      ],
      "run_at": "document_idle",
      "js": [
        "extractors/social.js"
      ]
    }
  ],
  "options_page": "ui/options.html",
  "browser_specific_settings": {
    "gecko": {
      "id": "ydownloadnow@y-mp3.top",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}