Examine source code of Flame Fairy

{
  "theme": {
    "images": {
      "theme_frame": "flamefairy_persona.png"
    },
    "colors": {
      "frame": "#d4a342",
      "tab_background_text": "#ace"
    }
  },
  "version": "2.0",
  "name": "Flame Fairy",
  "manifest_version": 2,
  "description": "as part of my Elemental Fairies series"
}