Examine source code of Serenity by M♥Donna

{
  "name": "Serenity by M♥Donna",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Serenity.jpg"
    },
    "colors": {
      "frame": "rgba(202, 212, 225, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(204, 213, 227, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(204, 213, 227, 0.08)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9adb5b7f-5250-4a0f-89fb-4d4a34c35208}"
    }
  }
}