telemetry helps. you still get to turn it off

A Firefox developer argues that telemetry is genuinely valuable for browser stability, security, and performance, while fully supporting users' right to disable it. Using concrete examples from his own work, he shows how telemetry enabled safe rollouts of security changes, identified real-world hangs, helped deprecate insecure features like jar: URIs, optimized canvas noise generation, and gave management data-backed answers about niche user populations. He also pushes back on the claim that privacy-focused browsers are telemetry-free, noting that every major browser either collects telemetry or benefits from upstream telemetry data.