Examine source code of stilla

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "stilla",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(26, 28, 28)",
      "toolbar_text": "rgb(250, 250, 250)",
      "frame": "rgb(13, 13, 13)",
      "tab_background_text": "rgb(242, 242, 242)",
      "toolbar_field": "rgb(18, 20, 20)",
      "toolbar_field_text": "rgb(250, 250, 250)",
      "tab_line": "rgb(136, 182, 208)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(76, 86, 106)",
      "tab_loading": "rgb(136, 182, 208)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5ad0eef1-1f79-4afe-a2b0-5aead3602758}"
    }
  }
}