Examine source code of Brown Forest

{
  "name": "Brown Forest",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "c.png"
    },
    "colors": {
      "frame": "rgba(235, 235, 235, 1)",
      "tab_background_text": "rgba(138, 43, 40, 1)",
      "bookmark_text": "rgba(138, 43, 40, 1)",
      "toolbar_field": "rgba(138, 43, 40, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a3eb1f8e-b2c1-4ea6-adc1-371e7696b1d4}"
    }
  }
}