Examine source code of Mid-Autumn Texture

{
  "manifest_version": 2,
  "version": "5.1",
  "name": "Mid-Autumn Texture",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 255, 255, 0.78)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(233, 233, 233)",
      "tab_background_text": "rgb(28, 28, 28)",
      "toolbar_field": "rgba(255, 255, 255, 0.66)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(35, 35, 35)",
      "tab_loading": "rgb(0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{aca52020-4743-4676-a81e-efc4b8304ed1}"
    }
  }
}