Firefox Profiler Deployment (March 20, 2026)

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

Highlights:

  • [fatadel] Make network markers in the network panel sticky on click (#5884)

Other Changes:

  • [Markus Stange] Start using const enum (#5879)
  • [Markus Stange] Some performance improvements (#5878)
  • [Nazım Can Altınova] Add startLine, startColumn, sourceMapURL and rename uuid to id in source table (#5882)
  • [Markus Stange] Reduce repetition in profile compacting code (#5885)
  • [Markus Stange] Some more activity graph drawing perf improvements (#5886)
  • [Markus Stange] Improve SampleGraph and HeightGraph performance (#5897)
  • [Nazım Can Altınova] :clockwise_vertical_arrows: Sync: l10n → main (March 20, 2026) (#5899)

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

  • be: Andrei Mukamolau
  • el: Jim Spentzos
  • en-GB: Paul
  • es-CL: ravmn
  • ia: Melo46
  • sv-SE: Andreas Pettersson
  • tr: Nazım Can Altınova

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