Examine source code of PPandGG

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "PPandGG",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 0, 0)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(132, 111, 149)",
      "toolbar_field": "rgba(29, 29, 29, 0.82)",
      "toolbar_field_text": "rgb(193, 193, 193)",
      "tab_line": "rgb(56, 52, 87)",
      "popup": "rgb(15, 15, 15)",
      "popup_text": "rgb(0, 149, 124)",
      "button_background_active": "rgb(50, 50, 50)",
      "icons_attention": "rgb(255, 248, 114)",
      "icons": "rgb(19, 137, 115)",
      "ntp_background": "rgb(8, 5, 11)",
      "popup_border": "rgb(255, 158, 90)",
      "popup_highlight": "rgb(110, 71, 193)",
      "sidebar_border": "rgb(117, 70, 187)",
      "sidebar_text": "rgb(230, 167, 66)",
      "sidebar": "rgb(0, 0, 0)",
      "tab_loading": "rgb(56, 52, 87)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{eefd8e94-7cc1-4d59-9a65-88f7d2955a22}"
    }
  }
}