Examine source code of Firefox Comic Book Blue

{
  "theme": {
    "images": {
      "theme_frame": "firefoxpersonacartoonfoxbanner1blue.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Firefox Comic Book Blue",
  "manifest_version": 2,
  "description": "Firefox in comic book style with a blue background."
}