firefox-devtools

firefox-devtools/profiler

Firefox Profiler — Web app for Firefox performance analysis

Stars: 1.5k
Forks: 491
Open beginner issues: 0
Indexed issues: 784
Avg merge: 3d 5h
Merged PRs (30d): 30

Dominant language: TypeScript
License: MPL-2.0
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 16, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted good first issue

Open All

780 open issues indexed

The Chrome importer loses precision by sampling with a 0.5ms interval Open

firefox-devtools/profiler#3986 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Display favicons in the process/thread list Open

firefox-devtools/profiler#3995 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 16, 2026
Display [inl] badge anywhere we display stacks: tooltips, marker table sidebar, flame graph, stack chart Open

firefox-devtools/profiler#3999 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Allow opening the source view from marker stacks displayed in the sidebar Open

firefox-devtools/profiler#4000 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 16, 2026
Idle java threads fill entire timeline Open

firefox-devtools/profiler#4004 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add the ability to embed source code into the profile, and upload it together with the profile Open

firefox-devtools/profiler#4018 · 1 comment · 3 reactions · 0 assignees · Indexed Sep 16, 2026
Can't record audio workloads for a long time Open

firefox-devtools/profiler#4021 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Mention how to share a profile in the home page Open

homepage polish

firefox-devtools/profiler#4038 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Setting the selection to end at the marker's end sometimes makes the marker disappear Open

markers

firefox-devtools/profiler#4046 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Clicking instant markers in the timeline causes a preview selection with a strange range Open

firefox-devtools/profiler#4047 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Create a sharing workflow for profile sharing on Android Open

android privacy

firefox-devtools/profiler#4082 · 5 comments · 1 reaction · 0 assignees · Indexed Sep 16, 2026
Can't disable remote profiler after devtools.performance.new-panel-enabled setting was removed Open

polish

firefox-devtools/profiler#4083 · 11 comments · 1 reaction · 0 assignees · Indexed Sep 16, 2026
Profiler does not work with Strict tracking protection Open

privacy

firefox-devtools/profiler#4085 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
In the profile track list dropdown, add small buttons in the process row for "show all threads" and "hide all threads" Open

firefox-devtools/profiler#4086 · 1 comment · 2 reactions · 0 assignees · Indexed Sep 16, 2026
Efficient representation of long idle stacks Open

firefox-devtools/profiler#4101 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add more documentation explaining how to debug specific scenarios Open

documentation

firefox-devtools/profiler#4106 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
The track selection menu filters counters by type rather than by name Open

firefox-devtools/profiler#4128 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
The profiler front-end gets confused about the profile start time in some profiles Open

firefox-devtools/profiler#4129 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add some documentation for our importers Open

documentation

firefox-devtools/profiler#4131 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Experiment with orders in the marker chart Open

markers

firefox-devtools/profiler#4134 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Experiment with colors in the marker chart Open

markers

firefox-devtools/profiler#4135 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Service worker processes should be identified more easily Open

polish timeline

firefox-devtools/profiler#4137 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add an option to sort the flame graph by source location of caller instead of alphabetical Open

firefox-devtools/profiler#4141 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 16, 2026
Rewrite the marker chart so that there's one canvas per line instead of one big canvas Open

firefox-devtools/profiler#4157 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Sanitizing out screenshots should keep CompositorScreenshot markers without the image Open

firefox-devtools/profiler#4162 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Crashing in FF v103 caputing profile data Open

user-facing regression

firefox-devtools/profiler#4164 · 12 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add documentation about the uploaded recordings Open

documentation uploaded profiles

firefox-devtools/profiler#4185 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Allow to toggle between showing samples and millisecond durations in call tree Open

firefox-devtools/profiler#4206 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add a table view to view the values of a specific marker over time Open

markers

firefox-devtools/profiler#4207 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Cannot customize range on a touch device Open

firefox-devtools/profiler#4208 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Change the snapshot format configuration to the default Open

firefox-devtools/profiler#4215 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Distinguish visually between the method parameters and the rest Open

firefox-devtools/profiler#4216 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Document zooming out in committed range selection section Open

documentation

firefox-devtools/profiler#4221 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Truncated numbers in the source view when viewing allocation sizes Open

firefox-devtools/profiler#4230 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
I would like to filter markers by window id Open

firefox-devtools/profiler#4239 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Localization support for user/developer documents Open

firefox-devtools/profiler#4249 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Make formatting types generic and extensible Open

discussion

firefox-devtools/profiler#4250 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Code view placement is a little awkward on a big screen Open

firefox-devtools/profiler#4269 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Sanitize the extension markers properly when user asks them to be removed Open

markers privacy

firefox-devtools/profiler#4277 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Trackpad gestures handled on the marker chart should also work on the timeline Open

firefox-devtools/profiler#4278 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
jank when attempting to show many tracks Open

firefox-devtools/profiler#4287 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Crash when hovering a filtered-out part in an active tab view timeline Open

active tab timeline

firefox-devtools/profiler#4309 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
When installing the service worker for the first time, if the user reloads the page before it's installed, they'll see a broken notification Open

polish user-facing regression

firefox-devtools/profiler#4338 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
The SampleGraph should use the full thread to compute its samples Open

polish timeline

firefox-devtools/profiler#4342 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Run the l10n-sync script in check-only mode for every PR Open

i18n

firefox-devtools/profiler#4353 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
When loading an unsymbolicated profile with the source view open, the source does not appear once the symbols arrive and the error is cached Open

firefox-devtools/profiler#4362 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
The render thread is not shown by default on a "gfx" preset profile Open

polish timeline

firefox-devtools/profiler#4373 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Uploading large profiles seems to fail Open

firefox-devtools/profiler#4388 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Selecting a range over a long profile is janky Open

firefox-devtools/profiler#4400 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Bad symbolication responses can introduce NaNs into thread.nativeSymbols.address Open

firefox-devtools/profiler#4433 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026

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