Examine source code of mars design

{
  "theme": {
    "images": {
      "theme_frame": "firefox22.jpg"
    },
    "colors": {
      "frame": "#e8dcdc",
      "tab_background_text": "#3ed141"
    }
  },
  "version": "2.0",
  "name": "mars design",
  "manifest_version": 2,
  "description": "mars design"
}