Examine source code of Abstrakt Tile

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Abstrakt Tile",
  "manifest_version": 2,
  "description": "A simple, abstrakt tile of retro colours with some parts made to look like reflections.\n\n<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/f9787f96d4a84c7d9c443550dbc0bc25a61866e7cdf4e10e36e8137c374cd1bb/http%3A//www.dinpattern.com\">www.dinpattern.com</a>"
}