proomt

Search

Search posts, papers, and topics

All posts

Mozilla Automation Teamcanova1 min readrelease notesintro

Firefox Profiler Deployment (September 22, 2026)

Read on mozilla.org

Summary

Mozilla released Firefox Profiler 0.10.0, adding several profiler‑cli features like category breakdowns, allocation data, thread listing, permalink support and a --with‑samply flag, plus UI and schema improvements. The update also tightens PII sanitization, adds typed‑array support, speeds up the call‑tree sidebar, and bumps the CLI version to 0.10.0.

  • profiler‑cli now shows category breakdowns and allocation data per profile
  • new thread‑list command and per‑marker JSON output simplify multi‑thread analysis
  • permalink command lets you reference already‑published profiles from the CLI
  • --with‑samply flag enables loading of samply‑generated profiles

Performance engineers and developers who script profiling with profiler‑cli should upgrade to leverage the new data views and usability fixes.

4/10
devopsperformancefrontend

Related reading

  1. Firefox Profiler Deployment (September 3, 2026)

    Firefox Profiler 0.9.0 release with a handful of CLI improvements (unlimited limit flag, better marker handling, network request count), UI tweaks (dark‑mode contrast, publish panel component), and library updates (oxfmt, typed arrays). Localisation added for several languages.

    Mozilla Automation Teammozilla.org1 minrelease

  3. The Road to Better Performance Profiles – Part 2

    Mozilla’s Automation Team added native system‑wide profiling to their CI pipelines for Speedometer 3 on Windows, macOS, Linux, and Android, using xperf, perf, and simpleperf together with the samply toolchain, and modernized the mozgeckoprofiler symbolication stack by replacing the legacy Eliot service with samply and profiler‑edit.

    Mozilla Automation Teammozilla.org5 min

  4. Firefox DevTools MCP 0.10.3 released

    Firefox DevTools MCP 0.10.3 is released, introducing a new `close_firefox_session` tool, full-page screenshot capability, and configurable download folders. This update also includes bug fixes and clarifies the usage of `restart_firefox` for controlling Firefox via WebDriver BiDi.

    Mozilla Automation Teammozilla.org1 minrelease