Examine source code of Rusty copper

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "rusty copper",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(225, 101, 47, 0.41)",
      "toolbar_text": "rgb(22, 41, 100)",
      "frame": "rgb(72, 101, 120)",
      "tab_background_text": "rgb(185, 168, 136)",
      "toolbar_field": "rgb(70, 68, 67)",
      "toolbar_field_text": "rgb(240, 141, 0)",
      "tab_line": "rgb(255, 160, 0)",
      "popup": "rgb(225, 234, 239)",
      "popup_text": "rgb(31, 145, 218)",
      "ntp_background": "rgb(170, 158, 169)",
      "tab_loading": "rgb(255, 160, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2ee3dc47-4daa-45e7-9e86-0d33fd8f2a57}"
    }
  }
}