Examine source code of Was able to frame three

{
  "theme": {
    "images": {
      "theme_frame": "0419-waku3-syoo.jpg"
    },
    "colors": {
      "frame": "#aff2d4",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Was able to frame three",
  "manifest_version": 2,
  "description": "3個の枠。。\n\n\n\n0419-waku3-syoo●"
}