Examine source code of Yastol Steam Deck

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Yastol Steam Deck",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(43, 42, 51)",
      "toolbar_text": "rgb(255, 100, 0)",
      "frame": "rgb(28, 27, 34)",
      "tab_background_text": "rgb(0, 221, 255)",
      "toolbar_field": "rgb(43, 42, 51)",
      "toolbar_field_text": "rgb(60, 227, 52)",
      "tab_line": "rgb(255, 100, 0)",
      "popup": "rgb(28, 27, 34)",
      "popup_text": "rgb(251, 251, 254)",
      "tab_loading": "rgb(255, 100, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e6349d22-ffff-4309-a868-2fb6db87e579}"
    }
  }
}