Examine source code of Nighttime Fairy

{
  "name": "Nighttime Fairy",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Nighttime Fairy.png"
    },
    "colors": {
      "frame": "rgba(20, 43, 89, 1)",
      "tab_background_text": "rgba(140, 135, 240, 1)",
      "toolbar": "rgba(20, 42, 92, 0.49)",
      "toolbar_field": "rgba(54, 80, 158, 0)",
      "toolbar_field_text": "rgba(211, 224, 27, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9eba4320-432a-4ab8-9c84-bce689ee599c}"
    }
  }
}