Examine source code of SCART

{
  "name": "SCART",
  "description": "Extensión que te ayudará a guardar tus productos favoritos",
  "permissions": [
    "storage",
    "tabs",
    "http://localhost:8080/"
  ],
  "version": "0.0.2.1",
  "icons": {
    "16": "img/logo16.png",
    "48": "img/logo48.png",
    "128": "img/logo128.png"
  },
  "browser_action": {
    "default_popup": "login.html"
  },
  "background": {
    "scripts": [
      "js/jquery.js",
      "js/background.js"
    ]
  },
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{d8b78ebc-31fa-494b-912f-1f7f7707a1b6}"
    }
  }
}