Examine source code of Radiant Browser

{
  "theme": {
    "images": {
      "theme_frame": "sibersinferno.header.png"
    },
    "colors": {
      "frame": "#ff7700",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Radiant Browser",
  "manifest_version": 2,
  "description": "Just a basic persona. It has a black/red/orange gradient in the heater and a red/yellow gradient in the footer."
}