Examine source code of Forest Magic

{
  "manifest_version": 2,
  "version": "4.0",
  "name": "Forest Magic",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 87, 93, 0.21)",
      "toolbar_text": "rgb(252, 255, 180)",
      "frame": "rgb(3, 13, 14)",
      "tab_background_text": "rgb(171, 255, 242)",
      "toolbar_field": "rgba(255, 255, 255, 0.04)",
      "toolbar_field_text": "rgb(221, 254, 248)",
      "tab_line": "rgb(237, 255, 105)",
      "popup": "rgb(3, 13, 14)",
      "popup_text": "rgb(254, 255, 237)",
      "tab_loading": "rgb(237, 255, 105)"
    }
  }
}