Examine source code of Green Notebook

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Green Notebook",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/background.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(174, 208, 219)",
      "toolbar_text": "rgb(38, 69, 61)",
      "frame": "rgb(102, 183, 65)",
      "tab_background_text": "rgb(245, 245, 245)",
      "toolbar_field": "rgb(227, 227, 227)",
      "toolbar_field_text": "rgb(155, 0, 255)",
      "tab_line": "rgb(227, 227, 227)",
      "popup": "rgb(227, 227, 227)",
      "popup_text": "rgb(133, 133, 170)",
      "ntp_background": "rgba(102, 183, 65, 0.5)",
      "tab_loading": "rgb(227, 227, 227)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{88990984-45d1-42b8-aeb7-de059e320967}"
    }
  }
}