Examine source code of TecnoG Amazon

{
  "update_url": "http://stelosca96.altervista.org/amazon/tecnog_chrome.crx",
  "name": "TecnoG Amazon",
  "version": "0.1.4resigned1",
  "description": "TecnoG Official Extension.",
  "homepage_url": "http://tecnog.altervista.org",
  "author": "Stefano Loscalzo",
  "icons": {
    "16": "img/icon16.png",
    "48": "img/icon48.png",
    "128": "img/icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "*://www.amazon.it/*"
  ],
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{c8a97395-682a-4148-8ab4-93e2c8301ef5}"
    }
  }
}