Examine source code of For firefighters

{
  "theme": {
    "images": {
      "theme_frame": "firefighterheader.png"
    },
    "colors": {
      "frame": "#d40707",
      "tab_background_text": "#7d797a"
    }
  },
  "version": "2.0",
  "name": "For firefighters",
  "manifest_version": 2,
  "description": "Just a header with flames, metallic maltese scramble.  The footer bears the phrase \"In Omnia Paratus\", which means \"in all things prepared\"."
}