Examine source code of Amazon Link Shortener

{
  "manifest_version": 2,
  "name": "Amazon URL Shortener",
  "description": "Shortens Amazon URLs",
  "version": "1.0",
  "content_scripts": [
    {
      "matches": [
        "https://www.amazon.com/*/dp/*"
      ],
      "js": [
        "script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{fce4d3b5-0399-4630-ad03-b9b14d219232}"
    }
  }
}