Examine source code of Freezing.

{
  "theme": {
    "images": {
      "theme_frame": "fox-0301-komentouketu--5.jpg"
    },
    "colors": {
      "frame": "#c9f0e2",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Freezing.",
  "manifest_version": 2,
  "description": "凍結の朝。"
}