Examine source code of Forcefighters

{
  "theme": {
    "images": {
      "theme_frame": "headerfirefoxtryff.jpg"
    },
    "colors": {
      "frame": "#2e6299",
      "tab_background_text": "#247d4b"
    }
  },
  "version": "2.0",
  "name": "Forcefighters",
  "manifest_version": 2,
  "description": "Forcefighters clan "
}