Examine source code of Red Pirate

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "RedPirate",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(41, 38, 45)",
      "toolbar_text": "rgb(235, 233, 244)",
      "frame": "rgb(174, 164, 187)",
      "tab_background_text": "rgb(172, 30, 30)",
      "toolbar_field": "rgb(159, 150, 150)",
      "toolbar_field_text": "rgb(248, 15, 58)",
      "tab_line": "rgb(109, 29, 55)",
      "popup": "rgb(73, 63, 85)",
      "popup_text": "rgb(192, 35, 77)",
      "tab_loading": "rgb(109, 29, 55)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1dacac91-ae3d-48e3-bbe5-901883ba7df3}"
    }
  }
}