Examine source code of Okinawa Steel

{
  "theme": {
    "images": {
      "theme_frame": "firefoxpersonaH3.JPG"
    },
    "colors": {
      "frame": "#89e9fa",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Okinawa Steel",
  "manifest_version": 2,
  "description": "An unique sword made under the highest standard for you to decorate your firefox. LucasLunar Design hopes you enjoy it."
}