Examine source code of Exploration in Teal

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Exploration in Teal",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-001-9c6d74e14860e77ee6f8f43e824bff25.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(9, 96, 102, 0.94)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(20, 54, 78)",
      "tab_background_text": "rgb(148, 157, 173)",
      "toolbar_field": "rgba(0, 0, 0, 0.18)",
      "toolbar_field_text": "rgba(230, 238, 238, 0.97)",
      "tab_line": "rgb(27, 202, 207)",
      "popup": "rgb(22, 54, 75)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(27, 202, 207)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0ea1ad1b-8e82-4b6a-859c-2bf8c71beb0c}"
    }
  }
}