Examine source code of Blue Leafy Thing

{
  "theme": {
    "images": {
      "theme_frame": "Firefox.jpg"
    },
    "colors": {
      "frame": "#0067b5",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Blue Leafy Thing",
  "manifest_version": 2,
  "description": "Just for Funsies. Blue Background with black brushes and a leafy brush on top."
}