Examine source code of Simple Light Blue FireFox

{
  "theme": {
    "images": {
      "theme_frame": "simple-firefox-persona-header.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#121212"
    }
  },
  "version": "2.0",
  "name": "Simple Light Blue FireFox",
  "manifest_version": 2,
  "description": "Very simple persona based on light blue color and firefox logo."
}