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

ButtonWithPanel and ArrowPanel components use a mix of state and props Open

code maintenance

firefox-devtools/profiler#1641 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add GC counters to the memory track Open

memory

firefox-devtools/profiler#1667 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
When tabbing through the app, the Footer comes first Open

accessibility

firefox-devtools/profiler#1675 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
The marker panel should use the colors of the markers in the timeline Open

markers polish unified profiler

firefox-devtools/profiler#1676 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
The screenshot track should make it obvious when something has changed on screen Open

markers

firefox-devtools/profiler#1677 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Show the correct line number in JS stack frames Open

needs gecko patch

firefox-devtools/profiler#1678 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Allow error pages to be reported Open

polish

firefox-devtools/profiler#1686 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Show screenshot preview when dragging a timerange Open

polish timeline

firefox-devtools/profiler#1689 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
When several DOM events occur next to each other, it's hard to see what's happening in the Marker Chart Open

markers polish

firefox-devtools/profiler#1709 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Error when navigating history in the compare interface Open

comparison

firefox-devtools/profiler#1736 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Profile comparison should provide profile alignment option Open

comparison

firefox-devtools/profiler#1748 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Demangling seems to fail on some function names Open

profile data

firefox-devtools/profiler#1793 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
[Draft] Landing Page 2.0 Open

discussion ux-needed

firefox-devtools/profiler#1801 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Issues with keyboard access of the context menu Open

accessibility polish

firefox-devtools/profiler#1826 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Discussion: have a common visual gimmick to indicate something is "on" Open

discussion ux-needed

firefox-devtools/profiler#1839 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Write a test for dragging range selections Open

tests

firefox-devtools/profiler#1846 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
"Set selection start time here" in the marker table context menu should scroll to the top Open

markers polish

firefox-devtools/profiler#1847 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Profile comparison URLs drop their transforms Open

comparison data transform polish

firefox-devtools/profiler#1856 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Memory marker track doesn't show the empty thread indicator Open

memory polish

firefox-devtools/profiler#1873 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
The Marker Table isn't refreshed after maximizing the browser window Open

markers polish

firefox-devtools/profiler#1880 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
ArrowPanel should use redux to help control the open/close states Open

code maintenance polish

firefox-devtools/profiler#1888 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Create more targeted PII sanitization component tests Open

code maintenance privacy tests

firefox-devtools/profiler#1896 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Remove setTimeout from ArrowPanel Open

code maintenance

firefox-devtools/profiler#1905 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Call tree stack type pref should either not affect other views or be visible in them Open

markers polish

firefox-devtools/profiler#1921 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Print more useful error messages for css lint errors Open

code maintenance

firefox-devtools/profiler#1945 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Create something like a "relevant for platform" implementation filter Open

firefox-devtools/profiler#1956 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Ability to switch from a specific Marker in the Marker table to a view of the time region for the marker Open

firefox-devtools/profiler#1980 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Make the network resource queuing delay whiskers more subtle Open

polish

firefox-devtools/profiler#1987 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Not including Hidden Threads also removes Screenshots Open

privacy

firefox-devtools/profiler#1992 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Hide permalink and re-word "re-publish" when viewing a profile from a localhost URL Open

polish

firefox-devtools/profiler#1998 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add docs for Gecko devs Open

documentation

firefox-devtools/profiler#2005 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
We still don't handle all preconnect cases properly Open

network panel polish

firefox-devtools/profiler#2020 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
We don't display the phases in the chart when missing some timings Open

network panel polish

firefox-devtools/profiler#2021 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Relative amounts of memory should be visible across memory tracks Open

memory polish timeline

firefox-devtools/profiler#2029 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Phase times in GC Marker tooltips are missing info Open

markers polish

firefox-devtools/profiler#2034 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Merge isUrlSetupDone and isHistoryReplaceState in UrlManager Open

code maintenance

firefox-devtools/profiler#2056 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Photon button styling issues in the header Open

polish

firefox-devtools/profiler#2066 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add tests for the subcategories work introduced in #2051 Open

categories tests

firefox-devtools/profiler#2069 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Support RTL Open

unified profiler

firefox-devtools/profiler#2084 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Radio buttons for callstacks(implementation filters) look like they are grayed out and disabled Open

call tree polish ux-needed

firefox-devtools/profiler#2088 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Keyboard parity with chrome Open

polish unified profiler

firefox-devtools/profiler#2091 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Screenshot only the content window Open

active tab needs gecko patch unified profiler

firefox-devtools/profiler#2092 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Keyboard shortcut to jump to next/previous sample Open

timeline

firefox-devtools/profiler#2095 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Make it easy to select top level page load from profiler UI Open

markers polish timeline

firefox-devtools/profiler#2100 · 11 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Check if there is another marker that use the backtrace in the invalidated place Open

markers polish

firefox-devtools/profiler#2108 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Reduce the multiple dispatches in profile load actions Open

code maintenance polish

firefox-devtools/profiler#2109 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Ensure during profile processing that every category has at least one subcategory Open

categories code maintenance

firefox-devtools/profiler#2119 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Need a category view for the entire range, not just for the selected node Open

call tree categories sidebar ux-needed

firefox-devtools/profiler#2122 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Ability to filter by category / subcategory Open

call tree categories

firefox-devtools/profiler#2123 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Make the selected box in the Flame Graph and the Stack Chart more visible Open

flame graph polish stack chart

firefox-devtools/profiler#2133 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026

firefox-devtools/profiler

Get new issues in your inbox