Examine source code of Cozy Red & Black

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Cozy Red & Black",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(31, 31, 31)",
      "toolbar_text": "rgb(237, 237, 237)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(184, 184, 184)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(237, 237, 237)",
      "tab_line": "rgba(180, 24, 50, 0.83)",
      "popup": "rgb(31, 31, 31)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgba(180, 24, 50, 0.83)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f0605d83-b37d-4c88-8d0a-27c9a324c45a}"
    }
  }
}