Firefox Profiler Deployment (September 3, 2026)

Firefox Tooling Announcements
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The latest version of the Firefox Profiler is now live! Check out the full changelog below to see what’s changed:

Highlights:

  • [Andrew Creskey] Show which network requests were prefetched (#6259)
  • [Florian Quèze] profiler-cli: accept --limit 0 as unlimited, and make truncation loud (#6267)

Other Changes:

  • [Nazım Can Altınova] Update oxfmt 0.59.0 → 0.63.0 (major) (#6262)
  • [Florian Quèze] profiler-cli: document the marker field:value search syntax (#6265)
  • [Florian Quèze] profiler-cli: report one time base for text and JSON output (#6266)
  • [Florian Quèze] profiler-cli: avoid a stack overflow on large marker threads (#6264)
  • [Markus Stange] Give the frameTable a lib column (#6258)
  • [Florian Quèze] profiler-cli: report the network request count the filters ran against (#6274)
  • [Nazım Can Altınova] Fix dark mode contrast of the warning icons in the publish panel (#6280)
  • [Nazım Can Altınova] Extract the publish panel warning indicator into a small component (#6282)
  • [Markus Stange] More typed arrays in the FrameTable (and a flags column) (#6173)
  • [Nazım Can Altınova] Improve the profiler-cli publish script and document the whole deployment in a better way (#6260)
  • [fatadel] :clockwise_vertical_arrows: Sync: l10n → main (September 3, 2026) (#6301)
  • [fatadel] Bump profiler-cli version to 0.9.0 (#6302)

Big thanks to our amazing localizers for making this release possible:

  • es-CL: ravmn
  • nl: Mark Heijl
  • sv-SE: Andreas Pettersson
  • sv-SE: Luna Jernberg
  • sv-SE: Peter Kihlstedt
  • tr: Selim Şumlu
  • tr: giray
  • zh-CN: 高乐喆

Find out more about the Firefox Profiler on profiler.firefox.com! If you have any questions, join the discussion on our Matrix channel!