Examine source code of firefox V2.0

{
  "theme": {
    "images": {
      "theme_frame": "headerfoxV2.0.jpg"
    },
    "colors": {
      "frame": "#080606",
      "tab_background_text": "#f2efef"
    }
  },
  "version": "2.0",
  "name": "firefox V2.0",
  "manifest_version": 2,
  "description": "my second theme hope you like."
}