Examine source code of Fire Pretty

{
  "theme": {
    "images": {
      "theme_frame": "firepretypersona.jpg"
    },
    "colors": {
      "frame": "#3595f0",
      "tab_background_text": "#68d6f7"
    }
  },
  "version": "2.0",
  "name": "Fire Pretty",
  "manifest_version": 2,
  "description": "a picture of an arabian in blue, red and black"
}