Examine source code of A Cool Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "A Cool Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-005-f5f3cf677b1f132c75ddc7bd319dd1fc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(6, 33, 79)",
      "toolbar_text": "rgb(255, 233, 233)",
      "frame": "rgb(6, 33, 79)",
      "tab_background_text": "rgb(162, 145, 145)",
      "toolbar_field": "rgba(6, 33, 79, 0.9)",
      "toolbar_field_text": "rgb(255, 233, 233)",
      "tab_line": "rgb(121, 124, 132)",
      "popup": "rgba(5, 23, 56, 0.94)",
      "popup_text": "rgb(255, 233, 233)",
      "tab_loading": "rgb(121, 124, 132)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d659512f-e6fc-49ff-b652-fcfeef94c61c}"
    }
  }
}