Examine source code of Creepvine Forest

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Creepvine Forest",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(44, 140, 83)",
      "toolbar_text": "rgb(161, 251, 198)",
      "frame": "rgb(0, 25, 9)",
      "tab_background_text": "rgb(161, 251, 198)",
      "toolbar_field": "rgb(0, 25, 9)",
      "toolbar_field_text": "rgb(161, 251, 198)",
      "tab_line": "rgb(44, 140, 83)",
      "popup": "rgb(0, 25, 9)",
      "popup_text": "rgb(161, 251, 198)",
      "icons": "rgb(161, 251, 198)",
      "ntp_background": "rgb(0, 25, 9)",
      "tab_loading": "rgb(44, 140, 83)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cea075b4-fc37-4efa-bb3c-5dbdf6fff41b}"
    }
  }
}