Examine source code of ville

{
  "name": "ville",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "slow_streets_on_lake.png"
    },
    "colors": {
      "frame": "rgba(0, 77, 255, 1)",
      "tab_background_text": "rgba(26, 0, 255, 0.46)",
      "toolbar": "rgba(107, 97, 97, 1)",
      "bookmark_text": "rgba(255, 0, 0, 1)",
      "toolbar_field": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(0, 255, 17, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b1465689-3aa3-4416-9850-6e8f1d233a89}"
    }
  }
}