Examine source code of YouTube Video Downloader

{
  "version": "2.2",
  "manifest_version": 2,
  "short_name": "youtube-download",
  "name": "YouTube™ Video Downloader",
  "background": {
    "page": "lib/chrome/background.html"
  },
  "homepage_url": "https://youtube-download.xyz/chrome.html",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "*://*/*",
    "proxy",
    "storage",
    "tabs"
  ],
  "description": "An ultra lite extension to download YouTube videos in all popular formats!",
  "icons": {
    "16": "data/icons/16.png",
    "32": "data/icons/32.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "data/icons/16.png",
      "32": "data/icons/32.png",
      "48": "data/icons/48.png",
      "64": "data/icons/64.png",
      "128": "data/icons/128.png"
    },
    "default_title": "Click to download video!!"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "run_at": "document_idle",
      "all_frames": false,
      "js": [
        "/js/lib/jquery-3.4.1.min.js",
        "/js/lib/tools.js",
        "/js/providers/abstract-provider.js",
        "/js/providers/video-provider.js",
        "/js/providers/dm.js",
        "/js/providers/fb.js",
        "/js/providers/in.js",
        "/js/providers/tw.js",
        "/js/providers/vk.js",
        "/js/providers/vm.js",
        "/js/providers/xx.js"
      ]
    }
  ]
}