Examine source code of Leave structure

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Leave structure",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 74, 70, 0.75)",
      "toolbar_text": "rgb(255, 193, 0)",
      "frame": "rgb(0, 220, 210)",
      "tab_background_text": "rgb(255, 238, 184)",
      "toolbar_field": "rgb(151, 205, 196)",
      "toolbar_field_text": "rgb(0, 35, 15)",
      "tab_line": "rgb(150, 255, 0)",
      "popup": "rgb(189, 255, 218)",
      "popup_text": "rgb(0, 35, 15)",
      "tab_loading": "rgb(150, 255, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{06cbabbb-df13-46e0-84bf-07482c3ce601}"
    }
  }
}