Examine source code of CF Purple Clouds 2

{
  "manifest_version": 2,
  "version": "1.2",
  "name": "CFTheme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(201, 60, 52)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(74, 25, 136)",
      "tab_background_text": "rgb(238, 238, 170)",
      "toolbar_field": "rgb(18, 6, 34)",
      "toolbar_field_text": "rgb(230, 230, 230)",
      "tab_line": "rgb(255, 134, 104)",
      "popup": "rgba(0, 0, 0, 0.85)",
      "popup_text": "rgb(221, 221, 221)",
      "button_background_hover": "rgb(229, 74, 59)",
      "icons_attention": "rgb(255, 255, 255)",
      "icons": "rgb(255, 255, 255)",
      "popup_border": "rgb(155, 155, 155)",
      "toolbar_bottom_separator": "rgb(68, 0, 0)",
      "toolbar_field_border": "rgb(87, 38, 169)",
      "toolbar_field_highlight": "rgb(0, 120, 215)",
      "toolbar_top_separator": "rgb(255, 134, 104)",
      "toolbar_vertical_separator": "rgb(135, 31, 40)",
      "tab_loading": "rgb(255, 134, 104)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6b9b52b6-e9cc-4ba6-8e36-c6d60d154f84}"
    }
  }
}