# Firefox Profiler Deployment (November 12, 2025)

**URL:** <https://discourse.mozilla.org/t/firefox-profiler-deployment-november-12-2025/146498>\
**Category:** Firefox Tooling Announcements\
**Tags:** firefox-profiler\
**Created:** [November 12, 2025, 7:11pm UTC](https://discourse.mozilla.org/t/firefox-profiler-deployment-november-12-2025/146498 "2025-11-12T19:11:27Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![canova](https://sea1.discourse-cdn.com/flex001/user_avatar/discourse.mozilla.org/canova/32/68189_2.png) [@canova](https://discourse.mozilla.org/u/canova)\
**Post date:** [November 12, 2025, 7:11pm UTC](https://discourse.mozilla.org/t/firefox-profiler-deployment-november-12-2025/146498/1 "2025-11-12T19:11:27Z")

</div>

The latest version of the [Firefox Profiler](https://profiler.firefox.com/) is now live! Check out the full changelog below to see what’s changed:

Highlights:

- [Florian Quèze] Source view for marker stacks ([#5633](https://github.com/firefox-devtools/profiler/pull/5633))
- [Nazım Can Altınova] Add fallback to funcTable.lineNumber when computing line timings ([#5644](https://github.com/firefox-devtools/profiler/pull/5644))
- [Florian Quèze] Show the marker keys instead of the labels in marker tooltips when alt is pressed. ([#5625](https://github.com/firefox-devtools/profiler/pull/5625))
- [Florian Quèze] Hide track management UI in single track profiles. ([#5656](https://github.com/firefox-devtools/profiler/pull/5656))
- [Nazım Can Altınova] Do not switch to call tree when clicking the activity graph while on sample based panels ([#5672](https://github.com/firefox-devtools/profiler/pull/5672))

Other Changes:

- [Nazım Can Altınova] Use getEmptySourceTable instead of constructing the table manually ([#5641](https://github.com/firefox-devtools/profiler/pull/5641))
- [Francesco Lodolo] Add GitHub workflow to check Fluent reference files ([#5647](https://github.com/firefox-devtools/profiler/pull/5647))
- [Nazım Can Altınova] Switch from Gitpod to GitHub Codespaces ([#5653](https://github.com/firefox-devtools/profiler/pull/5653))
- [Nazım Can Altınova] Migrate from CircleCI to GitHub Actions ([#5654](https://github.com/firefox-devtools/profiler/pull/5654))
- [Nazım Can Altınova] Run the CI in the production branch and on every pull request ([#5661](https://github.com/firefox-devtools/profiler/pull/5661))
- [Nazım Can Altınova] Convert l10n-sync.js from Flow comment types to JSDoc comments for Typescript ([#5659](https://github.com/firefox-devtools/profiler/pull/5659))
- [Florian Quèze] Display correct unit in Stack Chart tooltips for size profiles. ([#5658](https://github.com/firefox-devtools/profiler/pull/5658))
- [Florian Quèze] Rename hiddenTrackCount to trackCount. ([#5665](https://github.com/firefox-devtools/profiler/pull/5665))
- [Florian Quèze] Cleanup the profile info panel for size profiles (show file size and name, hide empty sections). ([#5657](https://github.com/firefox-devtools/profiler/pull/5657))
- [Markus Stange] Use valibot for symbolication API response validation ([#5666](https://github.com/firefox-devtools/profiler/pull/5666))
- [Nazım Can Altınova] Make sure to fetch the full git history for l10n-sync job in CI ([#5667](https://github.com/firefox-devtools/profiler/pull/5667))

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

- be: Mikalai Udodau
- de: Michael Köhler
- el: Jim Spentzos
- en-GB: Ian Neal
- es-CL: ravmn
- fr: Théo Chevalier
- fy-NL: Fjoerfoks
- ia: Melo46
- it: Francesco Lodolo [:flod]
- nl: Mark Heijl
- pt-BR: Marcelo Ghelman
- ru: berry, Valery Ledovskoy
- sv-SE: Andreas Pettersson
- tr: Grk
- zh-CN: Olvcpr423, wxie
- zh-TW: Pin-guang Chen

Find out more about the Firefox Profiler on [profiler.firefox.com](https://profiler.firefox.com)! If you have any questions, join the discussion on our [Matrix channel](https://chat.mozilla.org/#/room/#profiler:mozilla.org)!