Examine source code of Paint chaos

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Paint chaos",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(55, 55, 55)",
      "toolbar_text": "rgb(255, 229, 0)",
      "frame": "rgb(32, 32, 32)",
      "tab_background_text": "rgb(255, 224, 235)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(59, 0, 193)",
      "tab_line": "rgb(55, 210, 0)",
      "popup": "rgb(212, 213, 255)",
      "popup_text": "rgb(136, 37, 0)",
      "toolbar_field_border": "rgb(0, 109, 255)",
      "tab_loading": "rgb(55, 210, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9c03476b-1157-4a3b-b35e-6d6c2e645d66}"
    }
  }
}