Examine source code of Costloop – Subscription Scanner

{
  "manifest_version": 3,
  "name": "Costloop – Email Scanner for Firefox",
  "version": "1.0.99",
  "description": "Review Gmail and Outlook billing emails in Firefox to detect and import subscriptions into Costloop",
  "permissions": [
    "alarms",
    "storage",
    "history"
  ],
  "host_permissions": [
    "https://www.googleapis.com/*",
    "https://graph.microsoft.com/*",
    "https://app.costloop.app/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Costloop Email Scanner for Firefox",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'none'; base-uri 'none'"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "costloop-email-scanner@costloop.app",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "browsingActivity",
          "financialAndPaymentInfo",
          "personalCommunications",
          "personallyIdentifyingInfo"
        ]
      }
    }
  },
  "optional_permissions": []
}