Examine source code of Tab-clocker

{
  "manifest_version": 2,
  "name": "clock",
  "description": "know the exact time , once u click on new tab",
  "homepage_url": "https://aishwaryaideaswordpress.wordpress.com/2017/04/10/my-add-on-tab-clocker/",
  "version": "1.1resigned1",
  "icons": {
    "32": "icons/page-32.png",
    "48": "icons/page-48.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3d17d674-fa1d-445c-99e0-71f848f82f72}"
    }
  }
}