Examine source code of Enfant 2

{
  "theme": {
    "images": {
      "theme_frame": "Firefoxenfant2watermark.jpg"
    },
    "colors": {
      "frame": "#03041a",
      "tab_background_text": "#0f0f14"
    }
  },
  "version": "2.0",
  "name": "Enfant 2",
  "manifest_version": 2,
  "description": "Enfant 2"
}