Examine source code of The lighting is bright.

{
  "theme": {
    "images": {
      "theme_frame": "1-1112--kakusan-3-10---2200.jpg"
    },
    "colors": {
      "frame": "#faf2f0",
      "tab_background_text": "#f7f7f7"
    }
  },
  "version": "2.0",
  "name": "The lighting is bright.",
  "manifest_version": 2,
  "description": "照明が明るい。。"
}