Examine source code of The Swamp

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "The Swamp",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgba(22, 72, 75, 0.8)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(22, 72, 75)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(43, 43, 43)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(43, 43, 43)",
      "popup": "rgb(43, 43, 43)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(43, 43, 43)",
      "button_background_hover": "rgb(43, 43, 43)",
      "frame_inactive": "rgb(23, 89, 93)",
      "ntp_background": "rgb(23, 89, 93)",
      "tab_selected": "rgb(43, 43, 43)",
      "tab_loading": "rgb(43, 43, 43)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3a8070df-6c30-4d64-91a6-900b3ea0883b}"
    }
  }
}