Examine source code of Hippy Park

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Hippy Park",
  "manifest_version": 2,
  "description": "Time travel back to the 60's.  Don't go to work, smoke tree all day, lay on your back and stare blankly at the clouds.  Listen to music in the grass and do nothing else.....you are a Hippy, and your browser just got stoned !"
}