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

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780 open issues indexed

Opening source view using context menu does not always seek to the right line Open

firefox-devtools/profiler#4434 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Inconsistencies with keyboard shortcuts when call node context menu is open Open

firefox-devtools/profiler#4435 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Ignore webextensions functions Open

firefox-devtools/profiler#4449 · 6 comments · 1 reaction · 0 assignees · Indexed Sep 16, 2026
Support node's heap profiling Open

assigned help wanted profile data

firefox-devtools/profiler#4461 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Support go's pprof format Open

help wanted profile data

firefox-devtools/profiler#4462 · 13 comments · 6 reactions · 0 assignees · Indexed Sep 16, 2026
Use country level grid intensity to calculate CO2e values in power profiles Open

firefox-devtools/profiler#4479 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Consider ticking the box `Include hidden threads` by default when the profile comes from `about:logging` Open

firefox-devtools/profiler#4486 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Can't load profile due to OOM error Open

firefox-devtools/profiler#4491 · 8 comments · 1 reaction · 0 assignees · Indexed Sep 16, 2026
Proposed tweak to marker JSON format: Move type outside of data, into its own column Open

firefox-devtools/profiler#4494 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Can't load perf profile. Open

firefox-devtools/profiler#4500 · 7 comments · 1 reaction · 0 assignees · Indexed Sep 16, 2026
Feature: Add the ability to hide off-cpu samples (idle event loop, sleep, waiting on a lock, blocking on sync IPC) Open

firefox-devtools/profiler#4505 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 16, 2026
Escape ~ and - in string PIDs in the URL Open

firefox-devtools/profiler#4512 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Missing assembly code in the assembly view Open

firefox-devtools/profiler#4520 · 1 comment · 2 reactions · 0 assignees · Indexed Sep 16, 2026
Permission request messages for Firefox extensions Open

firefox-devtools/profiler#4538 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
IPC - Socket Thread not captured under Networking settings Open

firefox-devtools/profiler#4552 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Log requests sent to (Mozilla|Google) Location Service Open

firefox-devtools/profiler#4553 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Record WLAN scans done by network geolocation providers Open

firefox-devtools/profiler#4554 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Consider targeting the latest version of the profile format in our in-tree importers Open

discussion profile data

firefox-devtools/profiler#4555 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Update the `media-feature-range-notation` stylelint rule to its default in the future Open

code maintenance

firefox-devtools/profiler#4573 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Draw a vertical line in the timeline for the selected marker Open

firefox-devtools/profiler#4574 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 16, 2026
Use zstd when compressing profiles Open

profile data

firefox-devtools/profiler#4579 · 1 comment · 2 reactions · 0 assignees · Indexed Sep 16, 2026
An error occurred in Firefox Profiler Open

firefox-devtools/profiler#4583 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Marker stack implementation filter and the search filter breaks on very narrow windows Open

polish

firefox-devtools/profiler#4585 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
An unhandled error was thrown in a React component. Error: index undefined not in UniqueStringArray Open

firefox-devtools/profiler#4594 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Compare locally saved profiles Open

firefox-devtools/profiler#4595 · 0 comments · 2 reactions · 0 assignees · Indexed Sep 16, 2026
Automating the process of evaluating energy consumption Open

firefox-devtools/profiler#4599 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Consider positioning the User Timing row as fixed on Stack Chart Open

firefox-devtools/profiler#4608 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
After transforms, if the selected call node is not present in the call tree find a close-by call node to select Open

call tree data transform polish

firefox-devtools/profiler#4618 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Switching between threads should not change the selected panel (don't hide Call Tree panel if there exists a thread with samples) Open

firefox-devtools/profiler#4632 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
An error occurred in Firefox Profiler: DOMException: Failed to execute 'insertBefore' on 'Node' Open

firefox-devtools/profiler#4635 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Profiling sources of JS garbage no longer works? Open

firefox-devtools/profiler#4663 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Loading this profile is too slow Open

perf

firefox-devtools/profiler#4668 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Document power profiling Open

documentation

firefox-devtools/profiler#4673 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
When lots of functions are dropped, they're not easy to manage in the UI Open

firefox-devtools/profiler#4678 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Misleading URL in "Collapse resource" context menu item Open

firefox-devtools/profiler#4686 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Automatically open zip files with a single profile Open

polish

firefox-devtools/profiler#4713 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 16, 2026
Don't show "Lookup function name on Searchfox" in Single tab view Open

active tab call tree

firefox-devtools/profiler#4729 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
"RangeError: invalid digits value: NaN." when loading a profile Open

polish profile data

firefox-devtools/profiler#4737 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
In the documentation, make the link to matrix more obvious Open

documentation polish

firefox-devtools/profiler#4743 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
CPU tooltip is incorrect in this profile (shouldn't take idle category into account) Open

firefox-devtools/profiler#4750 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add a way to make a marker field used for the tooltipLabel searchable without showing it twice in the tooltip Open

firefox-devtools/profiler#4771 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
An error occurred in Firefox Profiler Open

firefox-devtools/profiler#4788 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
An error occurred in Firefox Profiler Open

profile data

firefox-devtools/profiler#4789 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Make vertical indicators more visible Open

polish timeline

firefox-devtools/profiler#4795 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Showing all tracks of a profile with several hundred tracks janks the UI for more than 20 seconds Open

perf timeline

firefox-devtools/profiler#4815 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
The logic to choose a format for a date in the list of uploaded profiles isn't always great Open

polish uploaded profiles

firefox-devtools/profiler#4851 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Some marker tooltips show urls as links that are not properly wrapped Open

markers polish

firefox-devtools/profiler#4854 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Reimplement the marker chart by using several canvas elements instead of just one Open

markers

firefox-devtools/profiler#4872 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Marker table toolbar layout is messed up in narrow windows Open

firefox-devtools/profiler#4884 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Allow collapsing "recursion" of a method across different classes (different overrides when recursing on a virtual method) Open

firefox-devtools/profiler#4885 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026

firefox-devtools/profiler

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