Examine source code of Seattle Kraken

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Seattle Kraken",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(0, 22, 40)",
      "toolbar_text": "rgb(53, 84, 100)",
      "frame": "rgb(153, 217, 217)",
      "tab_background_text": "rgb(0, 22, 40)",
      "toolbar_field": "rgb(104, 162, 185)",
      "toolbar_field_text": "rgb(233, 7, 43)",
      "tab_line": "rgb(233, 7, 43)",
      "popup": "rgb(0, 22, 40)",
      "popup_text": "rgb(233, 7, 43)",
      "tab_loading": "rgb(233, 7, 43)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b529440d-3dea-47f9-ac60-5fc7aff4b8a8}"
    }
  }
}