Examine source code of Vitesse

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Vitesse",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(18, 18, 18)",
      "toolbar_text": "rgb(81, 80, 78)",
      "frame": "rgb(18, 18, 18)",
      "tab_background_text": "rgb(148, 157, 165)",
      "toolbar_field": "rgb(24, 24, 24)",
      "toolbar_field_text": "rgb(134, 134, 131)",
      "tab_line": "rgb(132, 131, 128)",
      "popup": "rgb(18, 18, 18)",
      "popup_text": "rgb(132, 131, 128)",
      "button_background_active": "rgb(77, 147, 117)",
      "button_background_hover": "rgb(24, 24, 24)",
      "frame_inactive": "rgb(24, 24, 24)",
      "icons_attention": "rgb(77, 147, 117)",
      "icons": "rgb(81, 80, 78)",
      "ntp_background": "rgb(18, 18, 18)",
      "ntp_text": "rgb(148, 157, 165)",
      "popup_border": "rgb(24, 24, 24)",
      "popup_highlight": "rgb(24, 24, 24)",
      "sidebar_border": "rgb(24, 24, 24)",
      "sidebar_highlight_text": "rgb(205, 201, 189)",
      "sidebar_highlight": "rgb(24, 24, 24)",
      "sidebar_text": "rgb(148, 157, 165)",
      "sidebar": "rgb(18, 18, 18)",
      "tab_background_separator": "rgb(24, 24, 24)",
      "tab_loading": "rgb(77, 147, 117)",
      "tab_selected": "rgb(24, 24, 24)",
      "tab_text": "rgb(205, 201, 189)",
      "toolbar_bottom_separator": "rgb(24, 24, 24)",
      "toolbar_field_border_focus": "rgb(24, 24, 24)",
      "toolbar_field_border": "rgb(24, 24, 24)",
      "toolbar_field_focus": "rgb(24, 24, 24)",
      "toolbar_field_highlight_text": "rgb(205, 201, 189)",
      "toolbar_field_separator": "rgb(24, 24, 24)",
      "toolbar_field_text_focus": "rgb(205, 201, 189)",
      "toolbar_top_separator": "rgb(24, 24, 24)",
      "toolbar_vertical_separator": "rgb(24, 24, 24)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c72779dd-c47b-4ba9-9410-85d740e7ebab}"
    }
  }
}