Examine source code of Purple Haze

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Purple Haze",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(220, 220, 220, 0.39)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(205, 205, 205)",
      "tab_background_text": "rgb(255, 222, 229)",
      "toolbar_field": "rgb(171, 124, 175)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(255, 255, 255, 0)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(121, 126, 225)",
      "tab_loading": "rgba(255, 255, 255, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f7e36d3c-b8ee-4cd2-b9d3-f4b6d39fdfea}"
    }
  }
}