Examine source code of A winter beach

{
  "theme": {
    "images": {
      "theme_frame": "awinterbeach1.jpg"
    },
    "colors": {
      "frame": "#f7f4f4",
      "tab_background_text": "#a0b4de"
    }
  },
  "version": "2.0",
  "name": "A winter beach",
  "manifest_version": 2,
  "description": "So cold, so beatiful."
}