Examine source code of Running on Time

{
  "theme": {
    "images": {
      "theme_frame": "clockworks.jpg"
    },
    "colors": {
      "frame": "#e9ffc2",
      "tab_background_text": "#ceedd0"
    }
  },
  "version": "2.0",
  "name": "Running on Time",
  "manifest_version": 2,
  "description": "a fantasy world of how a clock works!"
}