Examine source code of Platanus bark

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#83b858",
      "tab_background_text": "#3d1300"
    }
  },
  "version": "2.0",
  "name": "Platanus bark",
  "manifest_version": 2,
  "description": "For the lover of natural themes, this is the park of a Platanus. Use this themes to give your firefox a wooden eco look."
}