Examine source code of Vanadium I

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Vanadium",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(166, 182, 203)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(93, 100, 115)",
      "tab_background_text": "rgb(208, 214, 226)",
      "toolbar_field": "rgba(255, 255, 255, 0.75)",
      "toolbar_field_text": "rgb(54, 88, 128)",
      "tab_line": "rgb(166, 182, 203)",
      "popup": "rgb(236, 236, 236)",
      "popup_text": "rgb(23, 23, 23)",
      "button_background_active": "rgb(105, 134, 114)",
      "button_background_hover": "rgb(186, 218, 152)",
      "icons": "rgb(60, 60, 60)",
      "tab_background_separator": "rgb(181, 181, 181)",
      "tab_text": "rgb(0, 0, 0)",
      "toolbar_bottom_separator": "rgb(154, 154, 154)",
      "toolbar_field_border": "rgb(154, 154, 154)",
      "toolbar_field_highlight": "rgb(91, 147, 104)",
      "toolbar_top_separator": "rgb(176, 176, 176)",
      "tab_loading": "rgb(166, 182, 203)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0e59bf53-2386-42dc-a47e-8cea651f0756}"
    }
  }
}