Examine source code of embers

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "embers",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(9, 5, 2)",
      "toolbar_text": "rgb(192, 121, 55)",
      "frame": "rgb(24, 8, 6)",
      "tab_background_text": "rgb(77, 39, 5)",
      "toolbar_field": "rgb(42, 14, 10)",
      "toolbar_field_text": "rgb(177, 96, 9)",
      "tab_line": "rgb(76, 56, 34)",
      "popup": "rgb(23, 10, 8)",
      "popup_text": "rgb(226, 206, 193)",
      "tab_loading": "rgb(76, 56, 34)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bdb8b3ae-2654-4908-a6cc-db7b8336555b}"
    }
  }
}