Examine source code of Yellow With Black Text

{
  "theme": {
    "images": {
      "theme_frame": "YellowMozillaFirefoxBackground-Header.JPG"
    },
    "colors": {
      "frame": "#f6fc53",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Yellow With Black Text",
  "manifest_version": 2,
  "description": "Completely yellow background with black text."
}