Examine source code of Gargoyles

{
  "theme": {
    "images": {
      "theme_frame": "gargoyles_persona_header.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Gargoyles",
  "manifest_version": 2,
  "description": "A Firefox persona for all fans of the original Gargoyles animated television series created by Greg Weisman. Featuring the most epic comic hero and Gargoyles clan leader Goliath and his friend Elisa. Retro TV shows for the win!"
}