Examine source code of Carbon 2

{
  "name": "Carbon 2",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "Persona_Header_Carbon.jpg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(117, 117, 117, 0.56)",
      "bookmark_text": "rgba(74, 222, 255, 1)",
      "toolbar_field": "rgba(219, 219, 219, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(117, 234, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2eed4dbd-4dc0-47c7-afbc-4798eebdf921}"
    }
  }
}