Examine source code of Peppermint

{
  "theme": {
    "images": {
      "theme_frame": "pfeffer-m-final.jpg"
    },
    "colors": {
      "frame": "#eaffc9",
      "tab_background_text": "#9ed964"
    }
  },
  "version": "2.0",
  "name": "Peppermint",
  "manifest_version": 2,
  "description": "Like fresh peppermint"
}