Examine source code of FF_MEETS_CRYSIS_nano

{
  "theme": {
    "images": {
      "theme_frame": "CRYSIS_13_nano_2.jpg"
    },
    "colors": {
      "frame": "#666060",
      "tab_background_text": "#ba223b"
    }
  },
  "version": "2.0",
  "name": "FF_MEETS_CRYSIS_nano",
  "manifest_version": 2,
  "description": "FIREFOX_MEETS_CRYSIS_nano"
}