Examine source code of Google container

{
  "manifest_version": 2,
  "default_locale": "fr",
  "name": "Google container 2025",
  "version": "1.4",
  "description": "",
  "applications": {
    "gecko": {
      "id": "@GoogleContainer",
      "strict_min_version": "58.0"
    }
  },
  "icons": {
    "48": "icon/google_48.png"
  },
  "permissions": [
    "<all_urls>",
    "contextualIdentities",
    "cookies",
    "management",
    "tabs",
    "webRequestBlocking",
    "webRequest",
    "notifications",
    "storage"
  ],
  "browser_action": {
    "default_title": "Google container 2025",
    "browser_style": true,
    "default_popup": "menu/menu.html",
    "default_icon": {
      "48": "icon/google_48.png"
    }
  },
  "background": {
    "scripts": [
      "script/google.js"
    ]
  }
}