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Update population sizing doc for new ping on mobile #822

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relud merged 1 commit into from
Apr 9, 2026
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Update population sizing doc for new ping on mobile #822

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10 changes: 7 additions & 3 deletions docs/advanced/population-sizing.md
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Expand Up @@ -71,6 +71,10 @@ The Glean dictionary can be searched for [available fields in Firefox Desktop](h

### Estimating for Firefox on Android and iOS

:::warning
As of Firefox 149 targeting context metrics on mobile have been moved from the `nimbus` table to the `nimbus_targeting_context` table.
:::

The following queries can be used to estimate available population for release channel experiments on Android and iOS, if not using Redash then `{{ sql_targeting_expression }}` should be replaced with the actual sql expression:

For Android release channel:
Expand All @@ -80,20 +84,20 @@ For Android release channel:
SELECT
COUNT(DISTINCT client_info.client_id) AS available_weekly_population,
FROM
`mozdata.fenix.nimbus`
`mozdata.fenix.nimbus_targeting_context`
WHERE
DATE(submission_timestamp) BETWEEN CURRENT_DATE - 7 AND CURRENT_DATE - 1
AND ({{ sql_targeting_expression }})
```

For iOS release the table is `mozdata.firefox_ios.nimbus`:
For iOS release the table is `mozdata.firefox_ios.nimbus_targeting_context`:

[iOS Redash Query](https://sql.telemetry.mozilla.org/queries/112919?p_sql_targeting_expression=TRUE)
```sql
SELECT
COUNT(DISTINCT client_info.client_id) AS available_weekly_population,
FROM
`mozdata.firefox_ios.nimbus`
`mozdata.firefox_ios.nimbus_targeting_context`
WHERE
DATE(submission_timestamp) BETWEEN CURRENT_DATE - 7 AND CURRENT_DATE - 1
AND ({{ sql_targeting_expression }})
Expand Down
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