(webextension-telemetry)=

# WebExtension API for Telemetry (deprecated)

:::{important}
Legacy Telemetry collection APIs are now deprecated.
Please use Glean instead.
:::

Use the `browser.telemetry` API to send telemetry data to the Mozilla Telemetry service. Restricted to Mozilla privileged webextensions.

## Types

### `ScalarType`

Type of scalar: 'count' for numeric values, 'string' for string values, 'boolean' for boolean values. Maps to `nsITelemetry.SCALAR_TYPE_*`.

### `ScalarData`

Represents registration data for a Telemetry scalar.

Properties:

- `kind` - See [ScalarType].
- `keyed` - *(optional, boolean)* True if this is a keyed scalar. Defaults to `false`.
- `record_on_release` - *(optional, boolean)* True if this data should be recorded on release. Defaults to `false`.
- `expired` - *(optional, boolean)* True if this scalar entry is expired. Operations on an expired scalar don't error (operations on an undefined scalar do), but the operations are no-ops. No data will be recorded. Defaults to `false`.

### `EventData`

Represents registration data for a Telemetry event.

Properties:

- `methods` - *(array)* List of methods for this event entry.
- `objects` - *(array)* List of objects for this event entry.
- `extra_keys` - *(array)* List of allowed extra keys for this event entry.
- `record_on_release` - *(optional, boolean)* True if this data should be recorded on release. Defaults to `false`.
- `expired` - *(optional, boolean)* True if this event entry is expired. Recording an expired event doesn't error (operations on undefined events do). No data will be recorded. Defaults to `false`.

## Functions

### `submitPing`

```js
browser.telemetry.submitPing(type, message, options);
```

Submits a custom ping to the Telemetry backend. See {ref}`submitting-customping`.

- `type` - *(string)* The type of the ping.

- `message` - *(object)* The data payload for the ping.

- `options` - *(optional, object)* Options object.

  - `addClientId` - *(optional, boolean)* True if the ping should contain the client id and profile group id. Defaults to `false`.
  - `addEnvironment` - *(optional, boolean)* True if the ping should contain the environment data. Defaults to `false`.
  - `overrideEnvironment` - *(optional, object)* Set to override the environment data. Default: not set.
  - `usePingSender` - *(optional, boolean)* If true, send the ping using the PingSender. Defaults to `false`.

### `canUpload`

```js
browser.telemetry.canUpload();
```

Checks if Telemetry upload is enabled.

### `scalarAdd`

```js
browser.telemetry.scalarAdd(name, value);
```

As of Firefox 134, this method is a no-op. See Bug 1930196.

Instead, use {doc}`Glean APIs <../../../glean/user/glean_for_legacy_scalars>` to record scalars.

### `scalarSet`

```js
browser.telemetry.scalarSet(name, value);
```

As of Firefox 134, this method is a no-op. See Bug 1930196.

Instead, use {doc}`Glean APIs <../../../glean/user/glean_for_legacy_scalars>` to record scalars.

### `scalarSetMaximum`

```js
browser.telemetry.scalarSetMaximum(name, value);
```

As of Firefox 134, this method is a no-op. See Bug 1930196.

Instead, use {doc}`Glean APIs <../../../glean/user/glean_for_legacy_scalars>` to record scalars.

### `recordEvent`

As of Firefox 132, this method is a no-op. See Bug 1894533.

Instead, use {doc}`Glean APIs <../../../glean/user/glean_for_legacy_events>` to record events.

### `registerScalars`

```js
browser.telemetry.registerScalars(category, data);
```

As of Firefox 134, this method is a no-op. See Bug 1930196.

Instead, use {doc}`Glean APIs <../../../glean/user/glean_for_legacy_scalars>` to record scalars.

### `registerEvents`

As of Firefox 132, this method is a no-op. See Bug 1894533.

Instead, use {doc}`Glean event definitions <../../../glean/user/glean_for_legacy_events>` for your extension's events.

### `setEventRecordingEnabled`

As of Firefox 133, this method is a no-op. Event recording is enabled by default unconditionally. See Bug 1920562.

Instead, use {doc}`Glean event definitions <../../../glean/user/glean_for_legacy_events>` for your extension's events.