Examine source code of Moonfly

{
  "name": "Moonfly",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "3840x2160-black-solid-color-background.jpg"
    },
    "colors": {
      "frame": "rgba(8, 8, 8, 1)",
      "tab_background_text": "rgba(198, 198, 198, 1)",
      "toolbar": "rgba(8, 8, 8, 1)",
      "bookmark_text": "rgba(198, 198, 198, 1)",
      "toolbar_field": "rgba(18, 18, 18, 1)",
      "toolbar_field_text": "rgba(198, 198, 198, 1)",
      "tab_line": "rgba(121, 218, 200, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7da30e3d-ef36-42f5-8d65-47b42e3b87fb}"
    }
  }
}