Examine source code of Pyro Fire

{
  "theme": {
    "images": {
      "theme_frame": "fireTopper.jpg"
    },
    "colors": {
      "frame": "#1285a4",
      "tab_background_text": "#f8b204"
    }
  },
  "version": "2.0",
  "name": "Pyro Fire",
  "manifest_version": 2,
  "description": "Picture of a cremora fireball - courtesy of '76 Pyro."
}