Examine source code of Space Travel (Blue)

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Space Travel (Blue)",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-026-829b05416f823e170310e7c826ad1bec.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(20, 20, 22)",
      "toolbar_text": "rgb(21, 24, 124)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(67, 71, 218)",
      "toolbar_field": "rgb(45, 38, 102)",
      "toolbar_field_text": "rgb(59, 96, 253)",
      "tab_line": "rgb(45, 38, 102)",
      "popup": "rgb(95, 106, 227)",
      "popup_text": "rgb(45, 38, 102)",
      "tab_selected": "rgb(95, 106, 227)",
      "tab_loading": "rgb(45, 38, 102)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4acb9d5e-e4fe-46c5-bf13-4e4848d3b876}"
    }
  }
}