{
  "metrics": {
    "newtab": {
      "scroll": {
        "description": "Whether the user scrolled more than SCROLL_TELEMETRY_THRESHOLD pixels during a newtab session. Absent if no qualifying scroll occurred during the session.\n",
        "disabled": false,
        "lifetime": "ping",
        "pings": ["newtab"],
        "type": "boolean"
      },
      "sections_learn_more": {
        "description": "Recorded when the \"Learn more\" option in the sections context menu is clicked.\n",
        "disabled": false,
        "extraArgs": {
          "allowed_extra_keys": ["newtab_visit_id"]
        },
        "lifetime": "ping",
        "pings": ["newtab"],
        "type": "event"
      }
    },
    "topsites": {
      "pinned_count": {
        "description": "The number of pinned top site tiles at the time of the newtab session.\n",
        "disabled": false,
        "lifetime": "application",
        "pings": ["newtab"],
        "type": "quantity"
      }
    }
  },
  "pings": {}
}