Examine source code of rensylve

{
  "theme": {
    "images": {
      "theme_frame": "firefoxsolid7.jpg"
    },
    "colors": {
      "frame": "#013300",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "rensylve",
  "manifest_version": 2,
  "description": "Two shades of green. A olive green (or army green) hue is mixed with a hint of gray; the footer is a very dark pine green shade."
}