Examine source code of Amazon Smile Reminder

{
  "manifest_version": 2,
  "name": "Amazon Smile Reminder",
  "version": "1.1resigned1",
  "description": "Adds header at the top of Amazon pages with redirect link to smile.amazon.com",
  "icons": {
    "48": "icons/border-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.amazon.com/*"
      ],
      "js": [
        "add_header.js"
      ],
      "css": [
        "add_header.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a548cd43-3b42-4162-8d2c-b5c8446d09da}"
    }
  }
}