# Firefox Profiler receives tooling updates and TypeScript 7 migration

> **Key takeaway:** The Firefox Profiler has been updated with improved CLI features, better source view handling, and a migration to TypeScript 7 and oxlint.

**Published:** 2026-10-22T17:01:29+00:00 
**Source:** Planet Mozilla 
**Category:** distro-planet 
**Canonical URL:** https://fosswire.org/news/firefox-profiler-receives-tooling-updates-and-typescript-7-m.html 

## Summary
Mozilla has deployed the latest version of the Firefox Profiler. The update includes significant developer tooling improvements, such as switching to TypeScript 7 and replacing ESLint with oxlint, alongside updates to the profiler-cli (version 0.12.0).

## Technical changes in Firefox Profiler
- Migrated to **TypeScript 7** and replaced **ESLint** with **oxlint**.
- Updated **profiler-cli** to version **0.12.0**.
- Added `--js-sources-from-func-names` flag to `profiler-edit`.
- Implemented fractional seconds with adaptive precision for CLI marker timestamps.
- Added support for **index source maps** and expanded symbolication field acceptance.
- Improved UI by making the scrollable editor view cover the full panel height.