The official repository of Mozilla's Firefox web browser. https://www.firefox.com/
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  • HTML 21.1%
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rperta c983b985e4 Revert "Bug 1812480 - Switch mac pkg source to repackaged instead of iscript r=releng-reviewers,taskgraph-reviewers,ahal" for causing Beetmover repackages build bustages
This reverts commit 454142c389.

Revert "Bug 1812480 - Change Mac pkgs contents mode r=spohl,releng-reviewers,bhearsum"

This reverts commit 1a92842445.
2026-05-22 13:27:46 +00:00
.agents/skills
.cargo
.claude
.codex
.github/workflows
.vscode
.zed
accessible Bug 1974383 - Implement headingoffset r=dom-core,accessibility-platform-reviewers,webidl,firefox-style-system-reviewers,smaug,emilio,Jamie,saschanaz 2026-05-21 22:31:44 +00:00
browser No Bug - Bumping Firefox l10n changesets r=release a=l10n-bump DONTBUILD CLOSED TREE 2026-05-22 06:49:54 +00:00
build Revert "Bug 2036896: apply code formatting via Lando" for causing assertion failures @ nsThreadManager 2026-05-22 04:45:49 +00:00
caps
chrome Bug 2011307 - Remove test-only support for marking chrome:// URI as needing to be loaded remotely, r=smaug,tabbrowser-reviewers,nsharpley 2026-05-21 19:23:48 +00:00
config Bug 2038789 - Move Windows stack flags from config.mk to windows.configure r=firefox-build-system-reviewers,sergesanspaille 2026-05-22 02:32:22 +00:00
devtools Bug 2040875 - [devtools] Simplify usages of Rule model from TextPropertyEditor. r=devtools-reviewers,nchevobbe 2026-05-21 22:32:16 +00:00
docs Bug 2039980 - Add toc to performance/index.md. r=mstange 2026-05-21 21:39:31 +00:00
docshell Bug 2041283 - Don't fire traverse navigate event when resuming an intercepted navigation. r=dom-core,smaug 2026-05-21 12:38:27 +00:00
dom Bug 2036794 - Add more precise checks for proxies in ObjectMayBeSwapped. r=jonco 2026-05-22 06:56:56 +00:00
editor Bug 2038865 - Convert DEBUG_DICT's printf to MOZ_LOG for dictionary selection. r=masayuki 2026-05-21 13:18:21 +00:00
extensions Revert "Bug 2037089 - Add mochitest for personal dictionary add/check/remove. r=m_kato" for causing hazard bustages @affixmgr.cxx. 2026-05-21 02:49:50 +00:00
gfx Bug 2030272 - Avoid unnecessary texture update processing when update_list is empty r=gw 2026-05-22 06:06:06 +00:00
gradle Bug 2041041 - Convert kotlin-dsl Gradle plugin builds to Kotlin DSL. r=ahochheiden 2026-05-21 19:23:24 +00:00
hal
image Bug 2041267. Fix image/test/mochitest/test_bug496292.html for jxl pref value on android. r=gfx-reviewers,aosmond 2026-05-21 11:25:58 +00:00
intl
ipc Bug 1989886 - Update protobuf to v35.0. r=firefox-build-system-reviewers,timhuang,sergesanspaille 2026-05-20 20:19:02 +00:00
js Bug 2041359: apply code formatting via Lando 2026-05-22 07:06:39 +00:00
layout Bug 2038579 - Add some missing pieces to CSSPerspective for Typed OM reification; r=emilio,firefox-style-system-reviewers 2026-05-22 05:45:34 +00:00
media Bug 2040468 - Update dav1d to 1718ff9aded99f0a89f5c7940d6afb8948301e33 r=chunmin 2026-05-21 22:52:48 +00:00
memory
mfbt Bug 1932088 - Fail cleanly via SEH if a single-step exception escapes the VEH chain. r=win-reviewers,gstoll 2026-05-20 08:22:00 +00:00
mobile No Bug - Bumping Mobile l10n changesets r=release a=l10n-bump DONTBUILD CLOSED TREE 2026-05-22 06:49:56 +00:00
modules Bug 2040074. Enable image.jxl.enabled pref on nightly channel only. r=saschanaz 2026-05-22 03:27:06 +00:00
mozglue Bug 1932088 - Fail cleanly via SEH if a single-step exception escapes the VEH chain. r=win-reviewers,gstoll 2026-05-20 08:22:00 +00:00
netwerk Revert "Bug 2036896: apply code formatting via Lando" for causing assertion failures @ nsThreadManager 2026-05-22 04:45:49 +00:00
nsprpub
other-licenses
parser Bug 2038532 - Update libexpat to version 2.8.1. r=mccr8 2026-05-21 22:45:55 +00:00
python Revert "Bug 1812480 - Switch mac pkg source to repackaged instead of iscript r=releng-reviewers,taskgraph-reviewers,ahal" for causing Beetmover repackages build bustages 2026-05-22 13:27:46 +00:00
remote Bug 2011326 - Part 2: Predict remote types with ProcessIsolation, r=whimboo,geckoview-reviewers,extension-reviewers,tabbrowser-reviewers,omc-reviewers,layout-reviewers,tcampbell,robwu,sthompson,emilio,mimi 2026-05-21 19:23:54 +00:00
security Bug 2039919 - upgrade NSS to e3020273b09c1b9517acacee7eac70b22385c32f. r=nss-reviewers,nkulatova UPGRADE_NSS_RELEASE 2026-05-21 22:30:16 +00:00
services No Bug, mozilla-central repo-update remote-settings mobile-experiments ct-logs - r=release-managers,RyanVM 2026-05-21 21:35:25 +00:00
servo Bug 1974383 - Implement headingoffset r=dom-core,accessibility-platform-reviewers,webidl,firefox-style-system-reviewers,smaug,emilio,Jamie,saschanaz 2026-05-21 22:31:44 +00:00
startupcache
storage
supply-chain
taskcluster Revert "Bug 1812480 - Switch mac pkg source to repackaged instead of iscript r=releng-reviewers,taskgraph-reviewers,ahal" for causing Beetmover repackages build bustages 2026-05-22 13:27:46 +00:00
testing Bug 2038579 - Add some missing pieces to CSSPerspective for Typed OM reification; r=emilio,firefox-style-system-reviewers 2026-05-22 05:45:34 +00:00
third_party Bug 2040468 - Update dav1d to 1718ff9aded99f0a89f5c7940d6afb8948301e33 r=chunmin 2026-05-21 22:52:48 +00:00
toolkit Bug 2031517 - Add Close tab confirmation feature callout config r=fluent-reviewers,omc-reviewers,bolsson,sachung,dmose 2026-05-22 04:16:54 +00:00
tools Bug 2039128 - Move TerminatingFlowTextMarker into ::geckoprofiler::markers. r=mstange,profiler-reviewers,canaltinova 2026-05-21 21:39:08 +00:00
uriloader Bug 1851822 - Add test for force download attachments. r=Gijs 2026-05-21 19:28:12 +00:00
widget Bug 2029694: apply code formatting via Lando 2026-05-22 06:08:27 +00:00
xpcom Bug 1832421 - Increase kUpperToleranceMs to reduce timer upper-bound failures. r=jlink 2026-05-22 02:16:17 +00:00
xpfe/appshell Bug 2038980: Set explicit fullscreen collection behavior at window creation to avoid AppKit's non-deterministic heuristic on macOS 15.3. r=mac-reviewers,bradwerth 2026-05-21 04:41:10 +00:00
.arcconfig
.babel-eslint.rc.js
.clang-format
.clang-format-ignore
.cron.yml
.editorconfig
.git-blame-ignore-revs
.gitattributes
.gitignore
.hg-annotate-ignore-revs
.hgignore
.hgtags
.lando.ini
.lldbinit
.mailmap
.mcp.json
.prettierignore
.prettierignore-css
.prettierignore-non-css
.prettierrc.js
.rstcheck.cfg
.stylelintignore
.stylelintrc.js
.taskcluster.yml Bug 2039383 - Index 'github-push' Decision tasks by branch, r=releng-reviewers,jcristau 2026-05-21 17:51:31 +00:00
.trackerignore
.yamllint
.ycm_extra_conf.py
AGENTS.md
AUTHORS
build.gradle
Cargo.lock Revert "Bug 1985968 - linux: record the signal emitter in a crash annotation r=gsvelto" for causing failures at test_crash_signal_origin_linux.js. 2026-05-20 15:42:51 +00:00
Cargo.toml
CLAUDE.md
client.mk
client.py
CLOBBER
CODE_OF_CONDUCT.md
configure
configure.py
eslint-file-globals.config.mjs Bug 1924775 - Use a defined version of the "globals" npm module, and resolved raised issues. r=frontend-codestyle-reviewers,devtools-reviewers,home-newtab-reviewers,flozia,nchevobbe,mossop,thecount 2026-05-21 07:45:40 +00:00
eslint-ignores.config.mjs
eslint-rollouts.config.mjs
eslint-subdirs.config.mjs
eslint-test-paths.config.mjs
eslint.config.mjs Bug 1924775 - Use a defined version of the "globals" npm module, and resolved raised issues. r=frontend-codestyle-reviewers,devtools-reviewers,home-newtab-reviewers,flozia,nchevobbe,mossop,thecount 2026-05-21 07:45:40 +00:00
GNUmakefile
gradle.properties
gradlew
gradlew.bat
LICENSE
mach
mach.cmd
mach.ps1
Makefile.in Bug 2038789 - Emit install-manifest rules from the backend instead of Makefile.in r=firefox-build-system-reviewers,sergesanspaille 2026-05-22 02:32:30 +00:00
mots.yaml Bug 2039699: Add ahale as a Core::Graphics peer. r=zeid,jrmuizel 2026-05-21 20:32:55 +00:00
moz.build
moz.configure
mozilla-config.h.in
package-lock.json Bug 1924775 - Use a defined version of the "globals" npm module, and resolved raised issues. r=frontend-codestyle-reviewers,devtools-reviewers,home-newtab-reviewers,flozia,nchevobbe,mossop,thecount 2026-05-21 07:45:40 +00:00
package.json Bug 1924775 - Use a defined version of the "globals" npm module, and resolved raised issues. r=frontend-codestyle-reviewers,devtools-reviewers,home-newtab-reviewers,flozia,nchevobbe,mossop,thecount 2026-05-21 07:45:40 +00:00
pyproject.toml
README.md
SECURITY.md
settings.gradle
srcdir-resolver.js
stylelint-rollouts.config.js Bug 2022982 - update toolbarbutton.css so it passes uses-design-tokens r=desktop-theme-reviewers,tgiles 2026-05-20 13:58:20 +00:00
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.