Examine source code of FireFox BlueFade

{
  "theme": {
    "images": {
      "theme_frame": "Personas01.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#2570d9"
    }
  },
  "version": "2.0",
  "name": "FireFox BlueFade",
  "manifest_version": 2,
  "description": "This is a FireFox Personas. W/ firefox logo and a vertical blue fade."
}