Examine source code of Winter Moon

{
  "name": "Winter Moon",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Winter Moon.png"
    },
    "colors": {
      "frame": "rgba(8, 31, 47, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(8, 31, 48, 0)",
      "bookmark_text": "rgba(237, 156, 173, 1)",
      "toolbar_field": "rgba(8, 31, 48, 0)",
      "toolbar_field_text": "rgba(33, 164, 194, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0d37573a-2eb3-4555-9e31-91802d04970b}"
    }
  }
}