Examine source code of reed.co.uk

{
  "theme": {
    "images": {
      "theme_frame": "Firefox-reedPersonas.png"
    },
    "colors": {
      "frame": "#f0f3f5",
      "tab_background_text": "#090836"
    }
  },
  "version": "2.0",
  "name": "reed.co.uk",
  "manifest_version": 2,
  "description": "Test"
}