Examine source code of ExoSpecial

{
  "name": "ExoSpecial",
  "version": "2.0",
  "manifest_version": 2,
  "description": "Automatically find coupon codes and special offers while shopping online!",
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "browser_action": {
    "default_title": "ExoSpecial"
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png",
    "512": "icons/icon-512.png"
  },
  "permissions": [
    "webRequest",
    "tabs",
    "http://*/*",
    "https://*/*",
    "storage",
    "unlimitedStorage"
  ]
}