Examine source code of YouTube HD

{
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube-nocookie.com/*",
        "https://www.youtube.com/*"
      ],
      "all_frames": true,
      "js": [
        "content-scripts/desktop-embed-isolated.js"
      ],
      "include_globs": [
        "https://www.youtube-nocookie.com/embed/*",
        "https://www.youtube.com/embed/*"
      ]
    },
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "js": [
        "content-scripts/desktop-isolated.js",
        "content-scripts/resize.js"
      ]
    },
    {
      "matches": [
        "https://music.youtube.com/*"
      ],
      "js": [
        "content-scripts/desktop-music-isolated.js"
      ]
    },
    {
      "matches": [
        "https://music.youtube.com/*",
        "https://www.youtube-nocookie.com/*",
        "https://www.youtube.com/*",
        "https://youtube.googleapis.com/*"
      ],
      "all_frames": true,
      "world": "MAIN",
      "js": [
        "content-scripts/desktop-player.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "117.0",
      "id": "{19d35315-b060-4f53-a585-082415e29324}"
    }
  },
  "description": "__MSG_cj_i18n_02146__",
  "default_locale": "en",
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "64": "icon-64.png",
    "128": "icon-128.png"
  },
  "host_permissions": [
    "https://youtube.com/*",
    "https://*.youtube.com/*",
    "https://www.youtube-nocookie.com/*",
    "https://youtube.googleapis.com/*",
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "popup.html"
  },
  "version": "1.17.5",
  "developer": {
    "url": "https://github.com/avi12/youtube-auto-hd",
    "name": "Avi"
  },
  "manifest_version": 3,
  "action": {
    "default_title": "YouTube Auto HD",
    "default_popup": "popup.html"
  },
  "permissions": [
    "cookies",
    "storage",
    "declarativeNetRequest"
  ],
  "name": "YouTube HD"
}