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

Figure out a way to diff threadCPUDelta values in the samples table for profile comparison Open

comparison timeline

firefox-devtools/profiler#3151 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Addition of flowchart for explaining the working of the project Open

firefox-devtools/profiler#3158 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Fix types for some network marker payloads following Markers 2.0 Open

code maintenance markers

firefox-devtools/profiler#3190 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Make WindowTitle component localizable Open

i18n

firefox-devtools/profiler#3207 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Limit the sample length to interval on the activity graph when there are no samples after/before Open

timeline

firefox-devtools/profiler#3212 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Create a tab selector for different captured tabs in a profile Open

active tab timeline unified profiler

firefox-devtools/profiler#3215 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Moving the mouse over a line of the Marker Chart containing many markers is janky Open

help wanted markers perf timeline

firefox-devtools/profiler#3217 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Some parts of the UI should be hidden for nostacksampling profiles Open

markers polish

firefox-devtools/profiler#3227 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Localize `additionalMessage` from `ProfileRootMessage` Open

i18n polish

firefox-devtools/profiler#3230 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
For the SampleGraph, we should render on integer pixel values Open

polish timeline

firefox-devtools/profiler#3237 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add "Remove Firefox Profiler Menu Button" to profiler.firefox.com landing page Open

documentation

firefox-devtools/profiler#3238 · 3 comments · 1 reaction · 0 assignees · Indexed Sep 16, 2026
Clarify that CPU is between samples and category&stack are at sample time Open

help wanted polish timeline

firefox-devtools/profiler#3240 · 5 comments · 1 reaction · 0 assignees · Indexed Sep 16, 2026
Filter search input is not aligned to left when the hint text is longer than the search input Open

i18n polish

firefox-devtools/profiler#3247 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add more tests for marker categories Open

code maintenance tests

firefox-devtools/profiler#3261 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
We need a way to make the most relevant markers be visible in the Marker Chart without scrolling up and down Open

discussion markers needs requirements

firefox-devtools/profiler#3263 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add some `computeActivityGraphFills` specific tests Open

code maintenance tests

firefox-devtools/profiler#3277 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Sanitizing the time range doesn't work in this profile Open

privacy profile data

firefox-devtools/profiler#3279 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
The code deciding whether to show the permalink and upload panel buttons lacks tests Open

firefox-devtools/profiler#3283 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Keep original Gecko profile and provide download access Open

firefox-devtools/profiler#3286 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Feature: manual entry of time range Open

firefox-devtools/profiler#3290 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Use integers for timestamps Open

profile data

firefox-devtools/profiler#3292 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Computation for the profile overhead values is wrong Open

profile data

firefox-devtools/profiler#3298 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Consider that we stop using `container` in favor of `document.body` in tests Open

code maintenance tests

firefox-devtools/profiler#3306 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add a test for searching in marker's categories Open

code maintenance tests

firefox-devtools/profiler#3309 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
We should highlight a whole column of flame graph and stack chart when a node is selected Open

flame graph polish stack chart

firefox-devtools/profiler#3314 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add a spinner/progress bar to indicate something is happening when compressing a profile Open

polish privacy

firefox-devtools/profiler#3320 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
When in stack chart mode, increase horizontally the call stacks hover zone so that it's easy to understand a profile without zooming Open

stack chart

firefox-devtools/profiler#3324 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
If labels had hidden per-call identifier, could this be shown in the Stack Chart? Open

discussion stack chart

firefox-devtools/profiler#3326 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
The "glob" module was added as a dev dependency in #991 but may not be needed Open

code maintenance

firefox-devtools/profiler#3327 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
The stack chart's view for allocations data isn't finished Open

memory stack chart

firefox-devtools/profiler#3331 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Nothing is displayed when zooming between two samples Open

timeline

firefox-devtools/profiler#3332 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
In the timeline's activity graph, hit testing is broken after a window resize Open

timeline

firefox-devtools/profiler#3334 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Allow importing `strace` output into the profiler Open

firefox-devtools/profiler#3339 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
With a large number of tracks, the initial load is very slow Open

perf timeline

firefox-devtools/profiler#3345 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Upgrade our build tool to yarn v2 Open

code maintenance

firefox-devtools/profiler#3355 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Implement Sticky Tooltips Open

markers

firefox-devtools/profiler#3356 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add more documentation inside the UI Open

documentation

firefox-devtools/profiler#3357 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Figure out a way to provide a comparison feature for the memory data Open

comparison memory

firefox-devtools/profiler#3360 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add a new chronological way to display markers in the marker chart Open

markers

firefox-devtools/profiler#3361 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
In the sample graph, show filtered samples differently instead of removing them Open

polish timeline

firefox-devtools/profiler#3364 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
In the sample graph, highlight big holes without any samples Open

polish timeline

firefox-devtools/profiler#3366 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
When looking at markers for a merged thread, the thread shown in the tooltip is always "Merged Thread" Open

markers polish

firefox-devtools/profiler#3368 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Provide some other visualisation options for some markers Open

markers

firefox-devtools/profiler#3369 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
We should show the allocation information in the timeline Open

memory polish timeline

firefox-devtools/profiler#3371 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Remove the outdated information that we can "reload" the page when versioning fails Open

polish profile data

firefox-devtools/profiler#3373 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
In the marker chart, display the full marker name when hovering it on the left column Open

markers polish

firefox-devtools/profiler#3374 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Change how we display a selection's length in the timeline Open

polish timeline

firefox-devtools/profiler#3375 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Document the profiler recording presets Open

documentation

firefox-devtools/profiler#3390 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add a title to context menus Open

call tree help wanted markers polish

firefox-devtools/profiler#3395 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Losing focus state when closing delete panel on /uploaded-recordings Open

accessibility uploaded profiles

firefox-devtools/profiler#3406 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026

firefox-devtools/profiler

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