Examine source code of Luna and Bird

{
  "theme": {
    "images": {
      "theme_frame": "firefoxskinwithluna3.jpg"
    },
    "colors": {
      "frame": "#266999",
      "tab_background_text": "#266999"
    }
  },
  "version": "2.0",
  "name": "Luna and Bird",
  "manifest_version": 2,
  "description": "Naoko Takeuchi's Luna, a character in her manga Sailor Moon."
}