Examine source code of Multi-Product Comparator

{
  "manifest_version": 3,
  "name": "__MSG_extensionName__",
  "version": "1.0.4",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "multi-product-comparator@twttr.github.io",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.idealo.de/*",
        "*://*.idealo.at/*",
        "*://*.idealo.es/*",
        "*://*.idealo.fr/*",
        "*://*.idealo.it/*",
        "*://*.idealo.co.uk/*",
        "*://*.geizhals.de/*",
        "*://*.geizhals.at/*",
        "*://*.geizhals.eu/*",
        "*://*.skinflint.co.uk/*",
        "*://*.cenowarka.pl/*",
        "*://*.billiger.de/*",
        "*://*.guenstiger.de/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "__MSG_extensionName__",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png"
    }
  }
}