mozilla-mobile/firefox-ios

[Telemetry Audit] Delete Phase 1: history places migration probes

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#27,161 opened on Jun 6, 2025

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Contributor OKDo not staleGood first issue

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Description

The following telemetry appears old and unused. They can be deleted in the metrics YAML and removed from the code.

places_history_migration.duration places_history_migration.migration_ended_rate places_history_migration.migration_error_rate places_history_migration.num_migrated places_history_migration.num_to_migrate

:information_source: Reference Person

@ih-codes

┆Issue is synchronized with this Jira Task

Contributor guide

Research direction
Locate the probe definitions in metrics.yaml and the corresponding Swift code, then remove them.
Tech stack
swift
Domain
observability
Issue type
Chore
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
SwiftTelemetry concepts
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70