Examine source code of Block Party

{
  "theme": {
    "images": {
      "theme_frame": "BlockParty_Header.jpg"
    },
    "colors": {
      "frame": "#156e03",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Block Party",
  "manifest_version": 2,
  "description": "Originally created in Blender 3D as a practice project, it has now formed into a desktop wallpaper and now a FireFox Persona."
}