Examine source code of Winter Angel

{
  "name": "Winter Angel",
  "manifest_version": 2,
  "version": "7.0",
  "theme": {
    "images": {
      "theme_frame": "AngelofWinterH3.jpg"
    },
    "colors": {
      "frame": "rgba(249, 247, 255, 0.94)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(248, 245, 255, 0.15)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f5f62cd2-be86-47de-841b-ddba0eb86545}"
    }
  }
}