Examine source code of Red

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Red",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-005-f5f3cf677b1f132c75ddc7bd319dd1fc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 0, 0)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(31, 0, 0)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(222, 20, 23)",
      "popup": "rgba(0, 0, 0, 0.9)",
      "popup_text": "rgb(255, 14, 20)",
      "button_background_hover": "rgb(88, 0, 0)",
      "icons": "rgb(255, 0, 0)",
      "popup_border": "rgb(255, 0, 0)",
      "tab_selected": "rgb(27, 0, 0)",
      "toolbar_field_border": "rgb(222, 20, 23)",
      "toolbar_field_highlight": "rgb(117, 8, 10)",
      "toolbar_top_separator": "rgb(0, 0, 0)",
      "tab_loading": "rgb(222, 20, 23)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c86eca03-a06c-41ed-b140-8ec522e3ed86}"
    }
  }
}