Examine source code of Vanadium II

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Vanadium II",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(145, 165, 180)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(54, 74, 86)",
      "tab_background_text": "rgb(210, 220, 225)",
      "toolbar_field": "rgba(208, 228, 238, 0.75)",
      "toolbar_field_text": "rgb(0, 79, 109)",
      "tab_line": "rgb(145, 165, 180)",
      "popup": "rgb(240, 240, 240)",
      "popup_text": "rgb(0, 0, 0)",
      "button_background_active": "rgb(54, 97, 116)",
      "button_background_hover": "rgb(70, 125, 149)",
      "icons": "rgb(0, 28, 53)",
      "tab_selected": "rgb(134, 164, 184)",
      "tab_text": "rgb(0, 0, 0)",
      "toolbar_field_highlight": "rgb(145, 165, 180)",
      "toolbar_top_separator": "rgb(134, 164, 184)",
      "tab_loading": "rgb(145, 165, 180)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6e210569-5645-43ec-b56f-6ffd00ce74d8}"
    }
  }
}