Examine source code of WesternRunner.co.uk

{
  "theme": {
    "images": {
      "theme_frame": "fireworks.jpg"
    },
    "colors": {
      "frame": "#3530ba",
      "tab_background_text": "#0039bf"
    }
  },
  "version": "2.0",
  "name": "WesternRunner.co.uk",
  "manifest_version": 2,
  "description": "WesternRunner tryout"
}