Examine source code of SilveOS

{
  "name": "SilveOS",
  "version": "2.1",
  "description": "SilveOS.com - Vue based internet operating system or webtop. It provides an environment similar to that of Windows inside web browser.",
  "permissions": [
    "tabs",
    "*://silveos.com/*",
    "webRequest"
  ],
  "browser_action": {
    "default_icon": {
      "16": "favicon16.png",
      "32": "favicon32.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "manifest_version": 2
}