Examine source code of Mozilla MonsterFox

{
  "theme": {
    "images": {
      "theme_frame": "mozillamonsterfox.jpg"
    },
    "colors": {
      "frame": "#4a2e2e",
      "tab_background_text": "#402626"
    }
  },
  "version": "2.0",
  "name": "Mozilla MonsterFox",
  "manifest_version": 2,
  "description": "The monster version of fire fox"
}