{
  "metrics": {
    "newtab_content": {
      "top_sites_click": {
        "description": "Recorded when a top sites tile is clicked.\n",
        "disabled": false,
        "extraArgs": {
          "allowed_extra_keys": [
            "advertiser_name",
            "frecency_boosted",
            "frecency_boosted_has_exposure",
            "is_sponsored",
            "position",
            "tile_id",
            "visible_topsites"
          ]
        },
        "lifetime": "ping",
        "pings": ["newtab-content"],
        "type": "event"
      },
      "top_sites_dismiss": {
        "description": "Recorded when the \"Dismiss\" menu item in the three-dots menu of a topsite is clicked.\n",
        "disabled": false,
        "extraArgs": {
          "allowed_extra_keys": [
            "advertiser_name",
            "is_sponsored",
            "position",
            "tile_id"
          ]
        },
        "lifetime": "ping",
        "pings": ["newtab-content"],
        "type": "event"
      },
      "top_sites_impression": {
        "description": "Recorded when a top sites tile is visible to the user.\n",
        "disabled": false,
        "extraArgs": {
          "allowed_extra_keys": [
            "advertiser_name",
            "frecency_boosted",
            "frecency_boosted_has_exposure",
            "is_sponsored",
            "position",
            "tile_id",
            "visible_topsites"
          ]
        },
        "lifetime": "ping",
        "pings": ["newtab-content"],
        "type": "event"
      },
      "top_sites_show_privacy_click": {
        "description": "Recorded when the \"Our sponsors & your privacy\" menu item in the three-dots menu of a topsite is clicked.\n",
        "disabled": false,
        "extraArgs": {
          "allowed_extra_keys": ["advertiser_name", "position", "tile_id"]
        },
        "lifetime": "ping",
        "pings": ["newtab-content"],
        "type": "event"
      }
    }
  },
  "pings": {}
}