Examine source code of Dark Red Focus

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Red",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-001-9c6d74e14860e77ee6f8f43e824bff25.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(60, 21, 21)",
      "toolbar_text": "rgb(202, 202, 202)",
      "frame": "rgb(22, 10, 10)",
      "tab_background_text": "rgb(93, 93, 93)",
      "toolbar_field": "rgb(34, 34, 34)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(72, 28, 28)",
      "popup": "rgb(72, 28, 28)",
      "popup_text": "rgb(184, 184, 184)",
      "tab_loading": "rgb(72, 28, 28)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{afa25a96-133a-4cf3-9ab4-176cc4076818}"
    }
  }
}