Examine source code of Dread

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dread",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(46, 51, 52)",
      "toolbar_text": "rgb(167, 131, 108)",
      "frame": "rgb(72, 8, 66)",
      "tab_background_text": "rgb(167, 131, 108)",
      "toolbar_field": "rgb(72, 90, 86)",
      "toolbar_field_text": "rgb(253, 255, 234)",
      "tab_line": "rgb(167, 131, 108)",
      "popup": "rgb(90, 82, 66)",
      "popup_text": "rgb(244, 255, 224)",
      "tab_loading": "rgb(167, 131, 108)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{450e34f3-6683-4faa-8be4-5e4835bc5cc5}"
    }
  }
}