Examine source code of MAC Vendor Lookup

{
  "manifest_version": 2,
  "name": "MAC Vendor Lookup",
  "version": "1.0",
  "icons": {
    "48": "icon.png"
  },
  "description": "Search for a manufacturer by MAC address via a notification",
  "permissions": [
    "menus",
    "notifications",
    "https://api.macvendors.com/"
  ],
  "background": {
    "scripts": [
      "bg.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "cccaaant@gmail.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}