Examine source code of Cosy Brown

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Cosy Brown",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-008-60d2718f8c915b5ba09f31df5555b459.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(135, 111, 90)",
      "toolbar_text": "rgb(255, 216, 180)",
      "frame": "rgb(71, 66, 58)",
      "tab_background_text": "rgb(192, 156, 121)",
      "toolbar_field": "rgb(98, 80, 65)",
      "toolbar_field_text": "rgb(255, 216, 180)",
      "tab_line": "rgb(135, 111, 90)",
      "popup": "rgb(98, 80, 65)",
      "popup_text": "rgb(255, 216, 180)",
      "tab_loading": "rgb(135, 111, 90)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{88f229f0-ce6e-46ab-9717-5647e26f3205}"
    }
  }
}