Firefox Tooling Announcements: Firefox Profiler Deployment (June 16, 2026)

The latest version of the )

• It requires Firefox changes that will land in Firefox 154, but after these changes, you will be able to see the source mapped function names as well as the source contents!

Other Changes:

• [Nazım Can Altınova] Fix call node context menu being hidden behind source view bottom box ()


• [fatadel] Upgrade @firefox-devtools/react-contextmenu to 5.2.4 ()


• [Florian Quèze] Don’t fail profile processing when a marker’s stack field is not a backtrace ()


• [cathaysia] Update isLocalURL to include LAN addresses, .local domains, and hostn… ()


• [Markus Stange] Add an insertStackLabels helper. ()


• [Markus Stange] Downgrade to React 19.1 to fix unusable dev build performance. ()


• [Markus Stange] Move paddings inside the tree header cells. ()


• [Markus Stange] Stop printing “error: too many arguments” during tests. ()


• [Nazım Can Altınova] Do not rely on localized texts in the settings menu tests (! If you have any questions, join the discussion on our
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