{
  "prefbar:info": {
    "formatversion": 3
  },
  "prefbar:menu:enabled": {
    "items": [
      "prefbar:button:browser_urlbar_trimURLs",
      "prefbar:button:prefetch-next",
      "prefbar:button:favicons",
      "prefbar:button:siteicons",
      "prefbar:button:urlbar_richresults",
      "prefbar:button:search_suggest",
      "prefbar:button:network_dns_disableIPv6",
      "prefbar:button:browser_cache_frecency-experiment"
    ]
  },
  "prefbar:button:browser_urlbar_trimURLs": {
    "type": "check",
    "label": "trim URLs",
    "prefstring": "browser.urlbar.trimURLs",
    "topref": "value",
    "frompref": "value"
  },
  "prefbar:button:prefetch-next": {
    "type": "check",
    "label": "先読み",
    "prefstring": "network.prefetch-next",
    "topref": "value",
    "frompref": "value"
  },
  "prefbar:button:favicons": {
    "type": "check",
    "label": "favicon",
    "prefstring": "browser.chrome.favicons",
    "topref": "value",
    "frompref": "value"
  },
  "prefbar:button:siteicons": {
    "type": "check",
    "label": "siteicon",
    "prefstring": "browser.chrome.site_icons",
    "topref": "value",
    "frompref": "value"
  },
  "prefbar:button:urlbar_richresults": {
    "type": "check",
    "label": "rich result",
    "prefstring": "browser.urlbar.maxRichResults",
    "topref": "12*Number(value)",
    "frompref": "Boolean(value)"
  },
  "prefbar:button:search_suggest": {
    "type": "check",
    "label": "suggest search",
    "prefstring": "browser.search.suggest.enabled",
    "topref": "value",
    "frompref": "value"
  },
  "prefbar:button:network_dns_disableIPv6": {
    "type": "check",
    "label": "DNS IPv6",
    "prefstring": "network.dns.disableIPv6",
    "topref": "!value",
    "frompref": "!value"
  },
  "prefbar:button:browser_cache_frecency-experiment": {
    "type": "menulist",
    "label": "cache experiment",
    "prefstring": "browser.cache.frecency_experiment",
    "items": [
      [
        "cache experiment(-1) off (=frecency_half_life_hours)",
        "-1"
      ],
      [
        "cache experiment(0) random set (=1..4)",
        "0"
      ],
      [
        "cache experiment(1) 6 hours",
        "1"
      ],
      [
        "cache experiment(2) 1 day",
        "2"
      ],
      [
        "cache experiment(3) 7 days",
        "3"
      ],
      [
        "cache experiment(4) 50 days",
        "4"
      ]
    ]
  }
}