Examine source code of #111111 Theme

{
  "name": "#111111 Theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "firefox_07-08-2022_15.26.png"
    },
    "colors": {
      "frame": "rgba(17, 17, 17, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(17, 17, 17, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(17, 17, 17, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(17, 17, 17, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{42f72684-3b04-4175-8ef8-73d52ce47da8}"
    }
  }
}