Examine source code of Winters Bird

{
  "name": "Winters Bird",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "WinterbirdHcopyCustom.jpg"
    },
    "colors": {
      "frame": "rgba(85, 184, 230, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(86, 181, 232, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(86, 181, 232, 0.09)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c6fa0835-ca0d-4436-80fb-3bf97353348e}"
    }
  }
}