Examine source code of Digital Saving

{
  "applications": {
    "gecko": {
      "id": "info@digitalsaving.it"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "images/icon128.png",
    "default_title": "Digital Saving",
    "default_popup": ""
  },
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "matches": [
        "http://www.amazon.com/*",
        "https://www.amazon.com/*",
        "http://www.amazon.ca/*",
        "https://www.amazon.ca/*",
        "http://www.amazon.co.uk/*",
        "https://www.amazon.co.uk/*",
        "http://www.amazon.de/*",
        "https://www.amazon.de/*",
        "http://www.amazon.es/*",
        "https://www.amazon.es/*",
        "http://www.amazon.fr/*",
        "https://www.amazon.fr/*",
        "http://www.amazon.it/*",
        "https://www.amazon.it/*",
        "http://www.amazon.co.jp/*",
        "https://www.amazon.co.jp/*",
        "http://www.amazon.cn/*",
        "https://www.amazon.cn/*",
        "http://www.gearbest.com/*",
        "https://www.gearbest.com/*",
        "http://www.instant-gaming.com/*",
        "https://www.instant-gaming.com/*",
        "http://www.press-start.com/*",
        "https://www.press-start.com/*"
      ]
    }
  ],
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "activeTab",
    "http://www.amazon.com/*",
    "https://www.amazon.com/*",
    "http://www.amazon.ca/*",
    "https://www.amazon.ca/*",
    "http://www.amazon.co.uk/*",
    "https://www.amazon.co.uk/*",
    "http://www.amazon.de/*",
    "https://www.amazon.de/*",
    "http://www.amazon.es/*",
    "https://www.amazon.es/*",
    "http://www.amazon.fr/*",
    "https://www.amazon.fr/*",
    "http://www.amazon.it/*",
    "https://www.amazon.it/*",
    "http://www.amazon.co.jp/*",
    "https://www.amazon.co.jp/*",
    "http://www.amazon.cn/*",
    "https://www.amazon.cn/*",
    "http://www.gearbest.com/*",
    "https://www.gearbest.com/*",
    "http://www.instant-gaming.com/*",
    "https://www.instant-gaming.com/*",
    "http://www.press-start.com/*",
    "https://www.press-start.com/*"
  ],
  "description": "Digital Saving - Le migliori offerte online a portata di click.",
  "homepage_url": "https://www.digitalsaving.it",
  "options_page": "",
  "manifest_version": 2,
  "name": "Digital Saving",
  "short_name": "DigitalSaving",
  "version": "1.0.2resigned1"
}