Examine source code of Watercolorfox

{
  "theme": {
    "images": {
      "theme_frame": "persona_watercolor_header.jpg"
    },
    "colors": {
      "frame": "#66a7f2",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Watercolorfox",
  "manifest_version": 2,
  "description": "This is a watercolor-style persona which keeps the great fox in the focus. It gives kind of a retro-look to firefox."
}