Examine source code of Aspen Rust DARK

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Aspen Rust DARK",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(63, 45, 21)",
      "toolbar_text": "rgb(255, 229, 176)",
      "frame": "rgb(22, 25, 22)",
      "tab_background_text": "rgb(64, 130, 130)",
      "toolbar_field": "rgb(100, 70, 26)",
      "toolbar_field_text": "rgb(255, 229, 176)",
      "tab_line": "rgb(224, 152, 44)",
      "popup": "rgb(63, 42, 21)",
      "popup_text": "rgb(255, 229, 176)",
      "button_background_hover": "rgb(41, 48, 41)",
      "icons_attention": "rgb(64, 130, 130)",
      "popup_border": "rgb(224, 152, 44)",
      "tab_text": "rgb(224, 152, 44)",
      "toolbar_field_border_focus": "rgba(174, 102, 3, 0)",
      "tab_loading": "rgb(224, 152, 44)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0c8da6f6-2677-412d-8016-53a619c38617}"
    }
  }
}