Examine source code of Amazon URL Cleaner

{
  "manifest_version": 2,
  "name": "Amazon URL Cleaner",
  "short_name": "AmazonCleaner",
  "version": "1.1",
  "description": "Cleans Amazon URLs by removing affiliate tags and unnecessary parameters.",
  "developer": {
    "name": "Z"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "*://*.amazon.com/*",
    "*://*.amazon.co.uk/*",
    "*://*.amazon.ca/*",
    "*://*.amazon.de/*",
    "*://*.amazon.es/*",
    "*://*.amazon.fr/*",
    "*://*.amazon.it/*",
    "*://*.amazon.co.jp/*",
    "*://*.amazon.in/*",
    "*://*.amazon.cn/*",
    "*://*.amazon.com.sg/*",
    "*://*.amazon.com.mx/*",
    "*://*.amazon.ae/*",
    "*://*.amazon.com.br/*",
    "*://*.amazon.nl/*",
    "*://*.amazon.com.au/*",
    "*://*.amazon.com.tr/*",
    "*://*.amazon.sa/*",
    "*://*.amazon.se/*",
    "*://*.amazon.pl/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "icons/icon48.png",
    "64": "icons/icon64.png",
    "96": "icons/icon96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{023e6286-d164-4835-be0f-1aecd55162fe}"
    }
  }
}