Examine source code of purple patterns

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "purple patterns",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgba(225, 234, 239, 0)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(255, 255, 255)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(20, 6, 68, 0)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(20, 6, 68)",
      "popup_text": "rgb(255, 255, 255)",
      "ntp_background": "rgb(20, 6, 68)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_border": "rgb(255, 255, 255)",
      "sidebar_border": "rgb(255, 255, 255)",
      "sidebar_highlight_text": "rgb(20, 6, 68)",
      "sidebar_highlight": "rgb(255, 255, 255)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(20, 6, 68)",
      "tab_background_separator": "rgb(255, 255, 255)",
      "tab_loading": "rgb(255, 255, 255)",
      "tab_selected": "rgb(20, 6, 68)",
      "toolbar_bottom_separator": "rgb(20, 6, 68)",
      "toolbar_field_border_focus": "rgb(255, 255, 255)",
      "toolbar_field_border": "rgb(255, 255, 255)",
      "toolbar_field_highlight_text": "rgb(20, 6, 68)",
      "toolbar_field_highlight": "rgb(255, 255, 255)"
    }
  },
  "applications": {
    "gecko": {
      "id": "purple-patterns@cpl"
    }
  }
}