Examine source code of Fire on Firefox

{
  "theme": {
    "images": {
      "theme_frame": "mozillapersona1.jpg"
    },
    "colors": {
      "frame": "#001feb",
      "tab_background_text": "#001feb"
    }
  },
  "version": "2.0",
  "name": "Fire on Firefox",
  "manifest_version": 2,
  "description": "A simple persona which is my first persona to make and is not the best."
}