Examine source code of Desolate mountain

{
  "theme": {
    "images": {
      "theme_frame": "b101020fu-kore--000kaig.jpg"
    },
    "colors": {
      "frame": "#f2efef",
      "tab_background_text": "#ede9c7"
    }
  },
  "version": "2.0",
  "name": "Desolate mountain",
  "manifest_version": 2,
  "description": "荒涼とした。。"
}