Examine source code of Vendesk

{
  "manifest_version": 2,
  "name": "Vendesk",
  "description": "Exibe Notificações",
  "version": "1.1",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_title": "Vendesk",
    "default_icon": "icons/icon.png"
  },
  "permissions": [
    "http://*/*",
    "https://*/*",
    "*://*/*",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "style.css"
      ],
      "js": [
        "js/jquery.js",
        "js/script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{13032796-ff4b-4bd5-8a00-ced66ecd194c}"
    }
  }
}