Examine source code of YTGrip: Assistant for Optimizing YouTube SEO

{
  "manifest_version": 2,
  "name": "YTGrip: Assistant for Optimizing YouTube SEO",
  "author": "YTGrip",
  "version": "1.0.1",
  "homepage_url": "https://www.ytgrip.com",
  "description": "This extension will be your assistant in optimizing YouTube SEO to get the best ranking for your target keywords and start increasing your organic views.",
  "icons": {
    "16": "assets/img/icon-16.png",
    "32": "assets/img/icon-32.png",
    "48": "assets/img/icon-48.png",
    "128": "assets/img/icon-128.png"
  },
  "permissions": [
    "<all_urls>",
    "storage"
  ],
  "web_accessible_resources": [
    "assets/css/optimization.css",
    "assets/img/icon-48.png",
    "assets/img/icon-19.png",
    "assets/img/loader.gif",
    "assets/lang/lang.json"
  ],
  "browser_action": {
    "default_icon": {
      "19": "assets/img/icon-19.png",
      "38": "assets/img/icon-38.png"
    },
    "default_title": "YTGrip: Assistant for Optimizing YouTube SEO",
    "default_popup": "index.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "assets/plugins/jquery-3.6.0.js",
        "assets/plugins/optimization.js",
        "assets/plugins/gauge.js",
        "assets/plugins/notify.js"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "assets/background.js"
    ],
    "persistent": true
  },
  "options_ui": {
    "page": "index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "support@ytgrip.com"
    }
  }
}