Examine source code of Payment Data Cheatsheet

{
  "manifest_version": 2,
  "name": "Payment Data Cheatsheet",
  "version": "1.1.0",
  "description": "Test payment data for developers",
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Payment Cheatsheet",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "paymentcheatsheet@maxim.pk",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      },
      "android": {
        "strict_min_version": "142.0"
      }
    }
  }
}