Examine source code of Side Engineer Calculator

{
  "manifest_version": 3,
  "name": "__MSG_appName__",
  "short_name": "__MSG_appShortName__",
  "description": "__MSG_appDesc__",
  "version": "24.2.19",
  "default_locale": "en",
  "author": "Justice Ogbonna",
  "browser_specific_settings": {
    "gecko": {
      "id": "floating-calculator@example.com",
      "strict_min_version": "121.0"
    }
  },
  "permissions": [
    "contextMenus",
    "storage",
    "cookies",
    "activeTab"
  ],
  "host_permissions": [
    "*://*/*"
  ],
  "action": {
    "default_icon": {
      "16": "assets/logo-16x16.png",
      "24": "assets/logo-24x24.png",
      "32": "assets/logo-32x32.png"
    },
    "default_title": "__MSG_appName__"
  },
  "icons": {
    "16": "assets/logo-16x16.png",
    "32": "assets/logo-32x32.png",
    "48": "assets/logo-48x48.png",
    "128": "assets/logo-128x128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "js": [
        "content-script/content-script.js"
      ],
      "css": [
        "content-script/content-script.css"
      ],
      "match_about_blank": true,
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "assets/logo-24x24.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    },
    {
      "resources": [
        "content-script/calculator.css"
      ],
      "matches": [
        "<all_urls>"
      ]
    },
    {
      "resources": [
        "assets/icon-min.svg"
      ],
      "matches": [
        "<all_urls>"
      ]
    },
    {
      "resources": [
        "assets/icon-max.svg"
      ],
      "matches": [
        "<all_urls>"
      ]
    },
    {
      "resources": [
        "assets/icon-close.svg"
      ],
      "matches": [
        "<all_urls>"
      ]
    },
    {
      "resources": [
        "content-script/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    },
    {
      "resources": [
        "standalone/calc.html"
      ],
      "matches": [
        "<all_urls>"
      ]
    },
    {
      "resources": [
        "assets/icon-full.svg"
      ],
      "matches": [
        "<all_urls>"
      ]
    },
    {
      "resources": [
        "standalone/scientific-calc.css"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "sidebar_action": {
    "default_panel": "standalone/calc.html",
    "default_title": "__MSG_appName__"
  },
  "background": {
    "service_worker": "background-script/service-worker.js",
    "scripts": [
      "background-script/service-worker.js"
    ]
  },
  "options_ui": {
    "page": "options-page/options.html",
    "open_in_tab": true
  }
}