Examine source code of Winter Magic

{
  "name": "Winter Magic",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Winter Magic.png"
    },
    "colors": {
      "frame": "rgba(163, 190, 223, 1)",
      "tab_background_text": "rgba(70, 63, 204, 1)",
      "toolbar": "rgba(163, 189, 224, 0)",
      "toolbar_field": "rgba(163, 189, 224, 0)",
      "toolbar_field_text": "rgba(70, 63, 204, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9623f5b6-15bb-4468-bc2e-cb8f0af9ca12}"
    }
  }
}