Examine source code of spotlight color range

{
  "theme": {
    "images": {
      "theme_frame": "firefox-spotlight-01-colors.jpg"
    },
    "colors": {
      "frame": "#fcfcfc",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "spotlight color range",
  "manifest_version": 2,
  "description": "spotlightâ„¢ is a rechargeable led light available in 12 fun and funky colors!\n\nshow your love for the world's coolest little light by lighting up your Firefox browser!"
}