Examine source code of Foxes on Silver

{
  "theme": {
    "images": {
      "theme_frame": "SilverFoxes.jpg"
    },
    "colors": {
      "frame": "#e36a00",
      "tab_background_text": "#e36a00"
    }
  },
  "version": "2.0",
  "name": "Foxes on Silver",
  "manifest_version": 2,
  "description": "Two orange foxes on a silver background. My first-ever Persona."
}