Examine source code of Just Natural

{
  "name": "Just Natural",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "JustNaturalHCustom.jpg"
    },
    "colors": {
      "frame": "rgba(237, 182, 189, 1)",
      "tab_background_text": "rgba(18, 18, 18, 1)",
      "toolbar": "rgba(237, 180, 187, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(237, 180, 187, 0.05)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{205226dc-2fe4-4285-969e-96a7ea407e6c}"
    }
  }
}