Examine source code of Ghettoberry Blast

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Ghettoberry Blast",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(30, 33, 41)",
      "toolbar_text": "rgb(204, 61, 121)",
      "frame": "rgb(30, 33, 41)",
      "tab_background_text": "rgb(204, 61, 121)",
      "toolbar_field": "rgb(27, 31, 41)",
      "toolbar_field_text": "rgb(85, 110, 168)",
      "tab_line": "rgb(69, 204, 149)",
      "popup": "rgb(27, 31, 41)",
      "popup_text": "rgb(146, 190, 230)",
      "tab_loading": "rgb(69, 204, 149)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f3c9bc73-566b-4f1b-b0db-286eff89ef52}"
    }
  }
}