Examine source code of Starting presentiment.

{
  "theme": {
    "images": {
      "theme_frame": "cc-sy0216--dait-01karafi-yakudou-03ue---c.jpg"
    },
    "colors": {
      "frame": "#f0eec9",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Starting presentiment.",
  "manifest_version": 2,
  "description": "始まる予感。"
}