Examine source code of Focus dark and orange

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Black and orange",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(33, 33, 41)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(18, 18, 20)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(11, 11, 39)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(255, 83, 0)",
      "popup": "rgb(33, 33, 41)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(255, 83, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d1054aee-a3a9-4406-a29a-cd1f9bf513ff}"
    }
  }
}