Examine source code of Forever a Red Devil

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#d60000"
    }
  },
  "version": "2.0",
  "name": "Forever a Red Devil",
  "manifest_version": 2,
  "description": "Show your support for the one and only Manchester United!! Manchester United - Forever a Red Devil is a fans page for the fans by fans. Wear your colours and show off your team!"
}