Examine source code of Magic City by M♥Donna

{
  "name": "Magic City by M♥Donna",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Magic City.jpg"
    },
    "colors": {
      "frame": "rgba(116, 124, 127, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(118, 125, 128, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(118, 125, 128, 0.08)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b5337f9d-d75f-4ee9-8d53-4dd1d5f63be2}"
    }
  }
}