Examine source code of One small step

{
  "theme": {
    "images": {
      "theme_frame": "head.jpg"
    },
    "colors": {
      "frame": "#8a8477",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "One small step",
  "manifest_version": 2,
  "description": "The famous moon boot print picture, in convenient Persona form."
}