Examine source code of It starts here.

{
  "theme": {
    "images": {
      "theme_frame": "d1202-nobopapl--wevei445sy.jpg"
    },
    "colors": {
      "frame": "#fceaea",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "It starts here.",
  "manifest_version": 2,
  "description": "。。:ここから始まる。。"
}