Examine source code of Purple-Clean

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Purple-Clean",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-001-9c6d74e14860e77ee6f8f43e824bff25.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(41, 41, 54)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(41, 41, 54)",
      "tab_background_text": "rgb(202, 202, 206)",
      "toolbar_field": "rgb(47, 47, 60)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(130, 233, 207, 0)",
      "popup": "rgb(41, 41, 54)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgba(130, 233, 207, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d37b1fe1-d399-4b4f-b973-64149ff20455}"
    }
  }
}