# "anonymous" ping

:::{note}
This ping is no longer sent by Firefox or Fennec.
:::

This ping is only for product survey purpose and will not track/associate client ID or profile group ID. It's used
to evaluate custom tab usage and see which app is using our custom tab.

Submission interval & triggers
Since this ping is used to measure the feature usage, it should be sent each time the client app uses our custom tab.

Dataset:
Only opt-in users will send out this ping.
Since all other pings will collect client ID and profile group ID. We need this custom ping to not do that.

Size and volume:
The size of submitted payload is small. And this custom ping should be deprecated after it's released for 6 months.

Privacy:
We won't collect customer information so there'll be no PI leak.

Data contents:
The content of this ping will let us know which app is using our custom tab.
Just like other feature usage measurement, we only need it for opt-in users (which consider as heavy users).

Structure:

```js
{
  "payload": {
    "client":  <string> // The package name of the caller app.
  }
  type: <string>, // "anonymous", "activation", "deletion", "saved-session", ...
  id: <UUID>, // a UUID that identifies this ping
  creationDate: <ISO date>, // the date the ping was generated
  version: <number>, // the version of the ping format, currently 4

  application: {
    architecture: <string>, // build architecture, e.g. x86
    buildId: <string>, // "20141126041045"
    name: <string>, // "Firefox"
    version: <string>, // "35.0"
    displayVersion: <string>, // "35.0b3"
    vendor: <string>, // "Mozilla"
    platformVersion: <string>, // "35.0"
    xpcomAbi: <string>, // e.g. "x86-msvc"
    channel: <string>, // "beta"
  },
}
```

## Field details

### client

It could be `com.example.app`, which is the identifier of the app.

## Version history

- v1: initial version - Will be shipped in [Fennec 55](https://bugzilla.mozilla.org/show_bug.cgi?id=1329157).

### Notes

There's no option in this custom ping since we don't collect clientId, profileGroupId nor environment data.