Examine source code of Fluid....

{
  "theme": {
    "images": {
      "theme_frame": "1028-hantnoo-ooo-ribon-teika.jpg"
    },
    "colors": {
      "frame": "#f1f5e7",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Fluid....",
  "manifest_version": 2,
  "description": "流動体。。\n\n\n0322-waku--kuritoge-kisiro-eu↓\n1028-hantnoo-ooo-ribon-teika"
}