Examine source code of Thank you everyone

{
  "theme": {
    "images": {
      "theme_frame": "thank-you2.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#030303"
    }
  },
  "version": "2.0",
  "name": "Thank you everyone",
  "manifest_version": 2,
  "description": "Thank you all.I love you all!! From Japan"
}