Examine source code of There forever..

{
  "theme": {
    "images": {
      "theme_frame": "v106--siroimoza-fence--flash-osir-v.jpg"
    },
    "colors": {
      "frame": "#faf7f7",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "There forever..",
  "manifest_version": 2,
  "description": "夏よ、そこにいつまでも。\n\n\n\n\nv106--siroimoza-fence--flash-osir-v"
}