The official repository of Mozilla's Firefox web browser. https://www.firefox.com/
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2026-03-05 00:22:41 +00:00
.cargo
.claude Bug 2020032 - Add firefox-aidev-plugins to known marketplaces. r=ai4dev-reviewers,padenot DONTBUILD 2026-03-04 16:53:28 +00:00
.codex
.github/workflows
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.zed
accessible Bug 2020545: Convert some diagnostic asserts disabled for fuzzing to debug asserts. r=eeejay 2026-03-04 13:38:43 +00:00
browser Bug 2021055 - Add logic to respect user-choice prefs for weather.display pref r=home-newtab-reviewers,thecount 2026-03-05 00:22:41 +00:00
build Bug 2019520 - Do not apply C++ clang-tidy checks for C sources r=sylvestre,firefox-static-analysis-reviewers 2026-03-04 10:32:04 +00:00
caps
chrome
config
devtools Bug 2017307 - Implement CSS revert-rule. r=firefox-style-system-reviewers,dshin,devtools-reviewers,nchevobbe 2026-03-04 13:39:09 +00:00
docs
docshell Revert "Bug 2020364 - Part 4: Check if ongoing navigation is NavigationID. r=dom-core,smaug" for causing wpt failures. 2026-03-04 16:45:54 +00:00
dom Bug 2014435 - Don't copy mOpts in MediaEngineFakeVideoSource::CreateFrom. r=padenot 2026-03-04 16:51:55 +00:00
editor
extensions
gfx Bug 2018113. r=gfx-reviewers,bradwerth 2026-03-04 10:33:20 +00:00
gradle
hal
image
intl
ipc
js Bug 2020713 - Part 2: Update make_intl_data. r=spidermonkey-reviewers,mgaudet 2026-03-04 16:52:53 +00:00
layout Bug 2016967 - Fix find-in-page not scrolling to sticky table cells by using natural frame position in ScrollFrameIntoView. r=emilio,layout-reviewers 2026-03-04 14:16:34 +00:00
media
memory
mfbt Bug 2020607: apply code formatting via Lando 2026-03-04 13:42:42 +00:00
mobile Bug 2020985 - Re-enable two PB related text selection UI tests r=dpop 2026-03-04 16:53:55 +00:00
modules Bug 2016898 - Fix leak and identity bugs for weak pref observers. r=gstoll 2026-03-04 13:43:50 +00:00
mozglue
netwerk
nsprpub
other-licenses
parser
python
remote Bug 2011471 - [remote] Remove unnecessary window position checks in test_adjustWindowGeometry_minimumDimensions. 2026-03-04 15:48:02 +00:00
security
services
servo Bug 2017307 - Implement CSS revert-rule. r=firefox-style-system-reviewers,dshin,devtools-reviewers,nchevobbe 2026-03-04 13:39:09 +00:00
startupcache
storage
supply-chain
taskcluster
testing Bug 2020824: Remove implementation-status: backlog from scroll-animations WPT meta. r=layout-scroll-driven-animation-reviewers,boris 2026-03-04 16:50:04 +00:00
third_party
toolkit Bug 2020067 - Increase about:translations copy-button reset delay r=ayeddi 2026-03-04 16:51:22 +00:00
tools Bug 2020669 - Update Firefox docs to reflect support of ternaries in marker labels. r=canaltinova,profiler-reviewers,dcarver DONTBUILD 2026-03-04 14:14:29 +00:00
uriloader
widget Revert "Bug 2001938 - Shortcut keys in combination with modifier should create UA r=edgar,media-playback-reviewers,alwu" on dev request due bug 2020233 This reverts commit c6e0aef25e. 2026-03-04 13:08:27 +00:00
xpcom Bug 2019299 - Fix code that forks the main process after the crash reporter has been set up r=nika 2026-03-04 09:12:08 +00:00
xpfe/appshell
.arcconfig
.babel-eslint.rc.js
.clang-format
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.mcp.json
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.rstcheck.cfg
.stylelintignore
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AGENTS.md
AUTHORS
build.gradle
Cargo.lock
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CLAUDE.md
client.mk
client.py
CLOBBER
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CODEOWNERS
configure
configure.py
eslint-file-globals.config.mjs
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gradlew
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LICENSE
mach
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moz.build
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package-lock.json
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README.md
SECURITY.md
settings.gradle
srcdir-resolver.js
stylelint-rollouts.config.js
substitute-local-geckoview.gradle
test.mozbuild

Firefox Browser

Firefox is a fast, reliable and private web browser from the non-profit Mozilla organization.

Contributing

To learn how to contribute to Firefox read the Firefox Contributors' Quick Reference document.

We use bugzilla.mozilla.org as our issue tracker, please file bugs there.

Resources

If you have a question about developing Firefox, and can't find the solution on Firefox Source Docs, you can try asking your question on Matrix at chat.mozilla.org in the Introduction channel.