Examine source code of darkZenXrayRain

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "darkZenXrayRain",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-011-d53e0d0d1538ed554a90e056a2f04eca.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(50, 52, 56)",
      "toolbar_text": "rgb(137, 118, 161)",
      "frame": "rgb(50, 52, 56)",
      "tab_background_text": "rgb(98, 97, 78)",
      "toolbar_field": "rgb(191, 222, 225)",
      "toolbar_field_text": "rgb(79, 131, 87)",
      "tab_line": "rgba(18, 57, 43, 0.57)",
      "popup": "rgb(38, 48, 46)",
      "popup_text": "rgb(227, 152, 140)",
      "icons_attention": "rgb(233, 86, 24)",
      "icons": "rgb(227, 152, 140)",
      "ntp_background": "rgb(65, 69, 72)",
      "ntp_text": "rgb(152, 231, 212)",
      "tab_selected": "rgb(176, 222, 101)",
      "tab_text": "rgba(18, 57, 43, 0.57)",
      "toolbar_top_separator": "rgba(65, 69, 72, 0)",
      "tab_loading": "rgba(18, 57, 43, 0.57)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{87d487c9-74eb-4b30-8296-aec1663fb820}"
    }
  }
}