Examine source code of The Tranquil Scene

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "The Tranquil Scene",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(238, 124, 52, 0.6)",
      "toolbar_text": "rgb(247, 249, 251)",
      "frame": "rgb(240, 139, 76)",
      "tab_background_text": "rgb(175, 222, 249)",
      "toolbar_field": "rgb(240, 139, 76)",
      "toolbar_field_text": "rgb(22, 52, 70)",
      "tab_line": "rgb(22, 52, 70)",
      "popup": "rgb(240, 139, 76)",
      "popup_text": "rgb(22, 52, 70)",
      "tab_loading": "rgb(22, 52, 70)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1eed05d4-8af6-451d-9070-edb664566590}"
    }
  }
}