firefox-devtools/profiler

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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

Implement a waterfall view Open

markers needs requirements

firefox-devtools/profiler#1104 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Display the marker start and end times in the tooltip Open

discussion markers polish ux-needed

firefox-devtools/profiler#1105 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 16, 2026
Add graphs to display the timings from #1081 in a user-friendlier way Open

call tree sidebar

firefox-devtools/profiler#1114 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Explore automatically expiring uploaded profiles after 6 months Open

privacy profile data unified profiler

firefox-devtools/profiler#1136 · 12 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Support loading of profiles from Instruments Open

profile data

firefox-devtools/profiler#1138 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Extract css data into separate CSS files Open

code maintenance

firefox-devtools/profiler#1233 · 13 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Clean up the argument ordering of initializeLocalTrackOrderByPid and initializeGlobalTrackOrder Open

code maintenance

firefox-devtools/profiler#1246 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Show file "categories" in network panel Open

needs gecko patch network panel

firefox-devtools/profiler#1257 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add status & method of request to display in network panel Open

needs gecko patch network panel

firefox-devtools/profiler#1258 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Rename "implementation" to "frame type" Open

code maintenance

firefox-devtools/profiler#1276 · 3 comments · 1 reaction · 0 assignees · Indexed Sep 16, 2026
Content process numbers should match their creation order Open

timeline

firefox-devtools/profiler#1283 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Provide an easy way of displaying prettified JavaScript source code for a given function Open

quantum flow

firefox-devtools/profiler#1298 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add test for `network`type to marker.js Open

markers network panel tests

firefox-devtools/profiler#1321 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Move the legal notice to the documentation Open

help wanted polish ready

firefox-devtools/profiler#1346 · 13 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Display vsync markers in the marker timeline at the top, as vertical lines across all threads Open

timeline

firefox-devtools/profiler#1348 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add a network request phase for "response waiting to be processed" Open

network panel

firefox-devtools/profiler#1349 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Improve accessibility for color blind users Open

accessibility polish

firefox-devtools/profiler#1361 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Mobile sidebar accessibility issues in the docs Open

accessibility

firefox-devtools/profiler#1378 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Chrome throws wasm compile error Open

firefox-devtools/profiler#1408 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Improve Enzyme best practice docs Open

documentation

firefox-devtools/profiler#1413 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
The view not being exactly the same when sharing a profile is confusing Open

polish quantum flow

firefox-devtools/profiler#1421 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Link call tree to network address Open

discussion

firefox-devtools/profiler#1441 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add more marker information from Google Chrome profiles Open

profile data

firefox-devtools/profiler#1463 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
We generate URLs that are too long for bit.ly in a profile with lots of threads Open

firefox-devtools/profiler#1479 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Reflows are very costly for some heavy profiles Open

perf

firefox-devtools/profiler#1480 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Fix invalid UrlStates when loaded from history, but no profile exists Open

navigation

firefox-devtools/profiler#1485 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Decide what to do with JS tracer chart double clicks Open

old js tracer polish

firefox-devtools/profiler#1488 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Implement tooltips for js tracer, and add coverage for the hitTest method Open

old js tracer polish tests

firefox-devtools/profiler#1489 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add "copy url" per double click / click in network panel Open

needs requirements network panel polish

firefox-devtools/profiler#1500 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Include line and column information in the JS tracer view Open

old js tracer polish

firefox-devtools/profiler#1504 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Come up with a better "Scripts" rendering strategy for the JS Tracer view Open

old js tracer polish

firefox-devtools/profiler#1505 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Clicking on the network track should take you to the correct row in the network chart Open

help wanted network panel polish

firefox-devtools/profiler#1525 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Provide a default profile in docs for getting started where something interesting happens Open

documentation

firefox-devtools/profiler#1542 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Snap range selection to navigation markers Open

markers timeline

firefox-devtools/profiler#1544 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Consider hovering strategy for JS Tracer self-time view (and regular view) Open

discussion old js tracer

firefox-devtools/profiler#1550 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add an importer for profiles from the macOS tool 'sample' Open

profile data

firefox-devtools/profiler#1553 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
No reference to Gecko Profiler xpi on https://perf-html.io/ Open

firefox-devtools/profiler#1574 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Consider banning undefined values in profile data Open

polish profile data

firefox-devtools/profiler#1599 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Move focus to Nework Details Panel when selecting "Network" tab with keyboard Open

accessibility polish

firefox-devtools/profiler#1604 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Add "Skip Navigation" links to the top of the page, only visible on :focus (for screenreaders) Open

accessibility help wanted ready

firefox-devtools/profiler#1606 · 11 comments · 1 reaction · 0 assignees · Indexed Sep 16, 2026
Access the Context Menus with keyboard Open

accessibility

firefox-devtools/profiler#1608 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Some images/icons are currently without an "alt" attribute Open

accessibility polish

firefox-devtools/profiler#1609 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Selecting timeline range should be possible with a keyboard Open

accessibility

firefox-devtools/profiler#1613 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Do a color audit to make sure we follow the color contrasting guidelines Open

accessibility polish

firefox-devtools/profiler#1614 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Use memoize-immutable for per-index selectors Open

code maintenance

firefox-devtools/profiler#1617 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Colors in the markers and the category chart should match Open

markers polish

firefox-devtools/profiler#1618 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Consider adding a11y eslint plugin to the project Open

accessibility assigned discussion help wanted

firefox-devtools/profiler#1620 · 5 comments · 0 reactions · 2 assignees · Indexed Sep 16, 2026
Focus should automatically move to the panel, when the panel is opened Open

accessibility ready

firefox-devtools/profiler#1637 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
"memory range in graph" is incorrect and memory tracks look flat Open

memory

firefox-devtools/profiler#1638 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Memory track hover dot affects scrollable size in header Open

help wanted polish ready timeline

firefox-devtools/profiler#1639 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026

firefox-devtools/profiler

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