Examine source code of Big Laptop Keyboard

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Big Laptop Keyboard",
  "manifest_version": 2,
  "description": "Made using <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/a35bb2d1d25a67a0d08da118d5e79bab838fc322a47ed2cfefad6be4ed68e1c6/https%3A//pixabay.com/en/computer-office-business-work-472016/\">https://pixabay.com/en/computer-office-business-work-472016/</a>"
}