Examine source code of Dear these stars

{
  "theme": {
    "images": {
      "theme_frame": "101007-h-hosi7-izukohe-siroi.jpg"
    },
    "colors": {
      "frame": "#3b0909",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Dear these stars",
  "manifest_version": 2,
  "description": "いとしき　この星たちよ"
}