Examine source code of Sonic Retro

{
  "theme": {
    "images": {
      "theme_frame": "Image2.png"
    },
    "colors": {
      "frame": "#d1d6a9",
      "tab_background_text": "#d4c900"
    }
  },
  "version": "2.0",
  "name": "Sonic Retro",
  "manifest_version": 2,
  "description": "A persona for my favorite site."
}