Examine source code of That nostalgic appearance. .

{
  "theme": {
    "images": {
      "theme_frame": "0508-13c47c60free--rose-oooo-2.jpg"
    },
    "colors": {
      "frame": "#dbf0c3",
      "tab_background_text": "#f2c4df"
    }
  },
  "version": "2.0",
  "name": "That nostalgic appearance. .",
  "manifest_version": 2,
  "description": "そのノスタルジックな外観。 。\n\n\n0508-13c47c60free--rose-oooo-2"
}