Examine source code of stayux-dark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "stayux-dark",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(27, 27, 45)",
      "toolbar_text": "rgb(213, 206, 249)",
      "frame": "rgb(27, 27, 45)",
      "tab_background_text": "rgb(213, 206, 249)",
      "toolbar_field": "rgb(27, 27, 45)",
      "toolbar_field_text": "rgb(213, 206, 249)",
      "tab_line": "rgb(62, 29, 231)",
      "popup": "rgb(27, 27, 45)",
      "popup_text": "rgb(213, 206, 249)",
      "tab_loading": "rgb(62, 29, 231)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1eb1ba41-a439-49d3-8033-29d2933f57ff}"
    }
  }
}