Examine source code of happy birthday

{
  "theme": {
    "images": {
      "theme_frame": "Untitled.jpg"
    },
    "colors": {
      "frame": "#030beb",
      "tab_background_text": "#ff8c00"
    }
  },
  "version": "2.0",
  "name": "happy birthday",
  "manifest_version": 2,
  "description": "Happy Birthday.\n\nMade in memory of today...\n\nmy birthday!"
}