Examine source code of 80's Gold

{
  "manifest_version": 2,
  "version": "1.12",
  "name": "80's Gold",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-016-af8c49de75012ca2c007f953ff2e4499.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(223, 223, 223, 0.58)",
      "toolbar_text": "rgb(3, 14, 28)",
      "frame": "rgb(177, 170, 8)",
      "tab_background_text": "rgb(84, 84, 84)",
      "toolbar_field": "rgba(255, 255, 255, 0.53)",
      "toolbar_field_text": "rgb(17, 102, 180)",
      "tab_line": "rgba(177, 170, 8, 0.1)",
      "popup": "rgb(231, 242, 244)",
      "popup_text": "rgb(84, 84, 84)",
      "tab_loading": "rgba(177, 170, 8, 0.1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{60bc23a9-dd70-4547-b620-799c726825c4}"
    }
  }
}