Examine source code of Clean Energy Future

{
  "theme": {
    "images": {
      "theme_frame": "firefox_persona.jpg"
    },
    "colors": {
      "frame": "#d2232a",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Clean Energy Future",
  "manifest_version": 2,
  "description": "UK Youth Climate Coalition works to inspire, unite and mobilise groups and individuals across the UK for a clean energy future."
}