Examine source code of Blaster Bubbles

{
  "theme": {
    "images": {
      "theme_frame": "personashead.png"
    },
    "colors": {
      "frame": "#cccccc",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Blaster Bubbles",
  "manifest_version": 2,
  "description": "A simple, clear and fun background to your favorite browser, with the energy of the orange color and the simplicity of the bubbles."
}