Examine source code of Trees, flowers

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Trees, flowers",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(199, 210, 219, 0.5)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(217, 224, 232)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgba(255, 255, 255, 0.75)",
      "toolbar_field_text": "rgb(70, 52, 32)",
      "tab_line": "rgb(255, 135, 202)",
      "popup": "rgb(255, 200, 206)",
      "popup_text": "rgb(39, 39, 39)",
      "ntp_background": "rgb(218, 241, 234)",
      "ntp_text": "rgb(117, 0, 13)",
      "tab_loading": "rgb(255, 135, 202)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{dfac05bc-3f83-4ed6-b5cf-5fd75dade125}"
    }
  }
}