Examine source code of Polygon Material Design

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Polygon Material Design",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(94, 34, 17, 0.61)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(191, 139, 31)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(132, 104, 29, 0.41)",
      "toolbar_field_text": "rgb(255, 249, 251)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(170, 134, 35)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{dfa25102-2635-4174-a931-43c1d4f75c1a}"
    }
  }
}