Examine source code of nur wir

{
  "theme": {
    "images": {
      "theme_frame": "FirefoxPersonaNichtVista22.png"
    },
    "colors": {
      "frame": "#f59c00",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "nur wir",
  "manifest_version": 2,
  "description": "alle nur wir's und Logo"
}