Examine source code of 90's Tracksuit

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "90's Tracksuit",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-009-f069b97f439938a011297c84464f0df6.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(48, 48, 187)",
      "toolbar_text": "rgb(104, 21, 31)",
      "frame": "rgb(103, 236, 118)",
      "tab_background_text": "rgb(80, 199, 105)",
      "toolbar_field": "rgb(191, 3, 223)",
      "toolbar_field_text": "rgb(182, 94, 12)",
      "tab_line": "rgb(208, 98, 196)",
      "popup": "rgb(253, 158, 60)",
      "popup_text": "rgb(215, 94, 25)",
      "tab_loading": "rgb(208, 98, 196)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f64e7689-198b-4f01-b6ca-e2c1e41a084f}"
    }
  }
}