Examine source code of Rot_01

{
  "manifest_version": 2,
  "version": "1.2",
  "name": "Rot_01_2",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(45, 11, 14)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(82, 10, 17)",
      "tab_background_text": "rgb(183, 183, 183)",
      "toolbar_field": "rgb(111, 31, 39)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(234, 22, 43)",
      "popup": "rgb(45, 11, 14)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_hover": "rgb(162, 51, 63)",
      "icons": "rgb(255, 255, 255)",
      "ntp_background": "rgb(4, 1, 1)",
      "popup_border": "rgb(234, 22, 43)",
      "popup_highlight": "rgb(111, 31, 39)",
      "toolbar_bottom_separator": "rgb(234, 22, 43)",
      "tab_loading": "rgb(234, 22, 43)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b9a6f07a-8791-47b9-8dc4-9f7351f9f671}"
    }
  }
}