firefox-devtools/profiler

View on GitHub

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

Consider adding an easy way to switch to the production version of the profiler when looking at a deploy preview Open

firefox-devtools/profiler#5445 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Ctrl+X in source code view cuts the text Open

help wanted

firefox-devtools/profiler#5451 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
The bandwidth track should display the average transfer speed in the tooltip when a range is selected Open

firefox-devtools/profiler#5452 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Pre-select the current tab when a recording is opened from dev tools Open

polish timeline unified profiler

firefox-devtools/profiler#5453 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Some "out of memory" errors are not reported Open

firefox-devtools/profiler#5465 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Improve marker search Open

markers

firefox-devtools/profiler#5468 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
The sidebar should start out closed on mobile for all panels, not just the panel that's visible on load Open

mobile

firefox-devtools/profiler#5470 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Visual metric markers are added to the incorrect tab main thread Open

markers

firefox-devtools/profiler#5476 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Perfetto traces converted with traceconv can't be imported on Firefox Profiler Open

profile data

firefox-devtools/profiler#5480 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Marker count is hard to find Open

markers polish

firefox-devtools/profiler#5489 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Duplicate IPC marker found warning in profiler console Open

markers

firefox-devtools/profiler#5492 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Use profile names in compare view Open

comparison

firefox-devtools/profiler#5494 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Consider adding more fields to the "Copy description" from marker command Open

markers polish

firefox-devtools/profiler#5498 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Feature request: recording option to capture callstacks for all markers Open

firefox-devtools/profiler#5519 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Profile processing only works properly in Firefox Open

firefox-devtools/profiler#5528 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
source code not avail Open

firefox-devtools/profiler#5550 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
shift + mouse-scroll should side scroll marker chart Open

markers polish

firefox-devtools/profiler#5551 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Use `withChartViewport` inside the network chart component Open

network panel polish

firefox-devtools/profiler#5552 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add ability to go from source view location to assembly view location Open

firefox-devtools/profiler#5619 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Consider having a way to directly file a bug (or open bmo) from the profiler after a profile has been captured. Open

polish

firefox-devtools/profiler#5634 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Should the source view suggest enabling the "JS Sources" feature? Open

firefox-devtools/profiler#5640 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Polish the UI for size profiles enough to be comfortable enabling it by default on the Firefox JSON Viewer Open

firefox-devtools/profiler#5655 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Type check the js files that have JSDocs Open

code maintenance

firefox-devtools/profiler#5662 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Consider making the flame graph the default panel Open

discussion polish

firefox-devtools/profiler#5669 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
TypeError: can't access property "color", n[s] is undefined Open

timeline

firefox-devtools/profiler#5690 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Improve the error message when browser fails to load profiles from localhost due to permission issues Open

firefox-devtools/profiler#5694 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Dragging a selection in the source view actually moves the text around Open

source view

firefox-devtools/profiler#5710 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Make the selection duration directly editable as a text Open

timeline

firefox-devtools/profiler#5723 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Large amounts of breadcrumbs become unusable Open

firefox-devtools/profiler#5724 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Show the Start time relative to "Navigation::Start" in the Marker Table Open

markers

firefox-devtools/profiler#5730 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Make it easier to fully expand the timeline vertically Open

timeline

firefox-devtools/profiler#5737 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Allow import of perfetto traces for android profiles Open

profile data

firefox-devtools/profiler#5757 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Merge C++ templates together Open

data transform

firefox-devtools/profiler#5763 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Adapt UI for JSON profiles Open

profile data

firefox-devtools/profiler#5776 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Comparing two local profiles broken Open

comparison

firefox-devtools/profiler#5781 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add context menu item for preview selection Open

stack chart timeline

firefox-devtools/profiler#5784 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add a sanitization checkbox for the traced values that come from the JS execution tracing Open

privacy

firefox-devtools/profiler#5790 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Track selector scrollbar appears over check marks Open

polish timeline

firefox-devtools/profiler#5804 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Make sourceview also can display sample percentage Open

polish source view

firefox-devtools/profiler#5815 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Feature request: Commit the search filter as a transform Open

data transform

firefox-devtools/profiler#5834 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Switch to another well maintained plugin from docsify Open

code maintenance documentation

firefox-devtools/profiler#5873 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Feature request: ability to filter `(anonymous)` frames Open

data transform feature

firefox-devtools/profiler#5875 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Use different shading for off-cpu self time in the flame graph Open

flame graph profile data timeline

firefox-devtools/profiler#5896 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Convert more flag-type arrays to use BitSets Open

code maintenance data transform

firefox-devtools/profiler#5931 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
[Enhancement] Bind `profiler.firefox.com/uploaded-recordings` to Mozilla SSO. Open

discussion uploaded profiles

firefox-devtools/profiler#5949 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Replace getProcessesWithMemoryTrack with more generic approach Open

memory

firefox-devtools/profiler#5962 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Check the counter track activity to decide if it should be visible Open

profile data

firefox-devtools/profiler#5967 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
samples.argumentValues is present in profiles from the Gecko profiler even if tracing is off Open

profile data

firefox-devtools/profiler#5971 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
In "QuotaManager IO" thread, the names of most the websites are still present even after sanitizing the profile. This effectively means that anyone can look at the profile and see what all websites I have visited Open

markers privacy

firefox-devtools/profiler#5976 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Allow resizing tracks in the top part of the interface Open

timeline

firefox-devtools/profiler#5977 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026

firefox-devtools/profiler

Get new issues in your inbox