Examine source code of Blue Test Wolf

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Blue Test Wolf",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-001-9c6d74e14860e77ee6f8f43e824bff25.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(106, 111, 116)",
      "toolbar_text": "rgba(201, 227, 249, 0.95)",
      "frame": "rgb(142, 179, 201)",
      "tab_background_text": "rgb(225, 239, 241)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(35, 108, 219)",
      "tab_line": "rgb(90, 203, 237)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(3, 36, 63)",
      "tab_loading": "rgb(90, 203, 237)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{af292dbb-7c99-4546-b1e2-0c0f103eb318}"
    }
  }
}