Examine source code of ChessMess

{
  "theme": {
    "images": {
      "theme_frame": "ChessMess.jpg"
    },
    "colors": {
      "frame": "#696060",
      "tab_background_text": "#0a0707"
    }
  },
  "version": "2.0",
  "name": "ChessMess",
  "manifest_version": 2,
  "description": "A tipped chess board with game pieces splashing into water.  This is known as the unhappy chess player move."
}