Examine source code of Sunsetfox

{
  "theme": {
    "images": {
      "theme_frame": "sunsetfox.jpg"
    },
    "colors": {
      "frame": "#f5a40e",
      "tab_background_text": "#faf9f7"
    }
  },
  "version": "2.0",
  "name": "Sunsetfox",
  "manifest_version": 2,
  "description": "Lovely burning sunset clouds"
}