Examine source code of abstract black dragon

{
  "theme": {
    "images": {
      "theme_frame": "dragon1.png"
    },
    "colors": {
      "frame": "#e6e6e6",
      "tab_background_text": "#292929"
    }
  },
  "version": "2.0",
  "name": "abstract black dragon",
  "manifest_version": 2
}