Examine source code of Flexible lines

{
  "theme": {
    "images": {
      "theme_frame": "header.jpg"
    },
    "colors": {
      "frame": "#19290b",
      "tab_background_text": "#3f3e15"
    }
  },
  "version": "2.0",
  "name": "Flexible lines",
  "manifest_version": 2,
  "description": "A stylish persona. It's a bit nature-inspired and will suit your firefox very well. "
}