Examine source code of Youtube Pro plus

{
  "manifest_version": 3,
  "name": "Youtube Pro Plus",
  "version": "4.0",
  "description": "Liquid Glass Theme, 10x Speed Booster, Sound Booster, Shorts Auto-Scroller, Smart Download, Auto Fullscreen, and Auto Resume , Scrrenshot capture,Watch Party",
  "background": {
    "service_worker": "background-sw.js",
    "scripts": [
      "browser-compat.js",
      "background.js"
    ]
  },
  "permissions": [
    "storage",
    "unlimitedStorage",
    "activeTab",
    "tabs",
    "clipboardWrite"
  ],
  "host_permissions": [
    "*://www.youtube.com/*",
    "*://youtube.com/*",
    "*://ssvid.net/*",
    "*://www.ssvid.net/*",
    "*://vidssave.com/*",
    "*://www.vidssave.com/*",
    "*://formbold.com/*",
    "https://catbox.moe/*",
    "https://files.catbox.moe/*",
    "https://*.onrender.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "youtube-pro-plus@archimetrix",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "personalCommunications",
          "personallyIdentifyingInfo",
          "websiteContent"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "icons": {
    "16": "imgs/icon16.png",
    "32": "imgs/icon32.png",
    "48": "imgs/icon48.png",
    "128": "imgs/icon128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "imgs/icon16.png",
      "32": "imgs/icon32.png",
      "48": "imgs/icon48.png",
      "128": "imgs/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*",
        "*://youtube.com/*"
      ],
      "js": [
        "browser-compat.js",
        "content.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "*://www.youtube.com/*",
        "*://youtube.com/*"
      ],
      "js": [
        "browser-compat.js",
        "sound-booster.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "*://ssvid.net/*",
        "*://www.ssvid.net/*",
        "*://vidssave.com/*",
        "*://www.vidssave.com/*"
      ],
      "js": [
        "browser-compat.js",
        "inject-download.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "*://www.youtube.com/*",
        "*://youtube.com/*"
      ],
      "js": [
        "browser-compat.js",
        "room-sync.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "features.css",
        "theme.css",
        "block-popups.css",
        "inject-speed.js",
        "imgs/playericon.svg",
        "imgs/playericon_inactive.svg",
        "imgs/redcircle.svg"
      ],
      "matches": [
        "*://www.youtube.com/*",
        "*://youtube.com/*"
      ]
    }
  ]
}