Examine source code of Boardingpoints

{
  "manifest_version": 3,
  "name": "Boardingpoints",
  "short_name": "Boardingpts",
  "description": "Earn Avios every time you shop online. One click activates your points at 800+ BA Shopping retailers.",
  "version": "1.0.0",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_popup": "src/popup/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    },
    "default_title": "Boardingpoints — Click to activate Avios"
  },
  "background": {
    "type": "module",
    "scripts": [
      "src/background/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/content/content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [
    "storage",
    "tabs",
    "activeTab",
    "alarms"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "icons/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "hello@boardingpoints.app",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}