diff --git a/www/palemoon/Makefile b/www/palemoon/Makefile
new file mode 100644
index 000000000000..1c60a0b6f3fc
--- /dev/null
+++ b/www/palemoon/Makefile
@@ -0,0 +1,187 @@
+# $FreeBSD$
+
+PORTNAME=	palemoon
+# UXP_VERSION below *MUST BE UPDATED* according to DISTVERSION (see recorded
+# commit of the 'platform' git sub-module and corresponding release in
+# UXP/releases; see MASTER_SITES for base URLs).
+DISTVERSION=	29.2.1
+CATEGORIES=	www
+MASTER_SITES=	https://repo.palemoon.org/MoonchildProductions/Pale-Moon/archive/:palemoon \
+		https://repo.palemoon.org/MoonchildProductions/UXP/archive/:uxp
+DISTFILES=	${DISTVERSION}_Release.tar.gz:palemoon \
+		RELBASE_${UXP_VERSION}.tar.gz:uxp
+DIST_SUBDIR=	MoonchildProductions
+
+MAINTAINER=	olce.freebsd.ports@certner.fr
+COMMENT=	Open-source web browser
+
+LICENSE=	MPL20 MISC
+LICENSE_COMB=	multi
+LICENSE_NAME_MISC=	Miscellaneous free and open-source licenses
+LICENSE_FILE=	${WRKSRC}/LICENSE
+LICENSE_FILE_MISC=	${WRKSRC}/platform/toolkit/content/license.html
+LICENSE_PERMS_MISC=	dist-mirror pkg-mirror auto-accept
+
+# Not sure about the real status of ARM, but only ARM packages of old versions of
+# PM are available in some Linux distros.
+ONLY_FOR_ARCHS=	amd64 i386
+ONLY_FOR_ARCHS_REASON=Upstream only cares about i386/amd64
+
+# Common deps & build options
+BUILD_DEPENDS=	autoconf-2.13:devel/autoconf213 \
+		yasm:devel/yasm \
+		zip:archivers/zip \
+
+LIB_DEPENDS=	libdbus-1.so:devel/dbus \
+		libdbus-glib-1.so:devel/dbus-glib \
+		libfontconfig.so:x11-fonts/fontconfig \
+		libfreetype.so:print/freetype2
+
+USES=		pkgconfig perl5 gmake gnome xorg desktop-file-utils
+USE_PERL5=	build
+# XXX
+# GTK3 support currently needs gtk20 and gconf2 to pass old-configure (and
+# maybe more).
+# See also: https://repo.palemoon.org/MoonchildProductions/UXP/issues/1638.
+USE_GNOME=	cairo gdkpixbuf2 glib20 pango \
+		gtk30 gtk20:build gconf2:build
+USE_XORG=	xt x11 xcb xext xrender
+
+# We require GCC (see also GCC_DEFAULT below), but we need to make sure that
+# there are no runtime dependencies to libstdc++, i.e., that libc++'s headers
+# and libraries are used during compilation and link.
+USES+=		compiler:gcc-c++11-lib
+
+# Put this here pending creation of USES=gtar
+BUILD_DEPENDS+=	gtar:archivers/gtar
+BINARY_ALIAS+=	tar=${LOCALBASE}/bin/gtar
+
+BUILD_DEPENDS+=	tauthon:lang/tauthon
+BINARY_ALIAS+=	python=${LOCALBASE}/bin/tauthon \
+		python2=${LOCALBASE}/bin/tauthon \
+		python2.7=${LOCALBASE}/bin/tauthon
+
+BUNDLE_LIBS=	yes
+
+## Options
+
+# Official branding is enabled in compliance with Pale Moon's redistribution
+# license (see https://www.palemoon.org/redist.shtml), point 8b, as explicitly
+# confirmed by the owner (Moonchild; see
+# https://forum.palemoon.org/viewtopic.php?f=5&t=25625), provided options are
+# not modified beyond what is necessary to get a stable build on FreeBSD. So DO
+# NOT CHANGE default options without the maintainer's approval.
+
+OPTIONS_SINGLE+=	SOUND
+OPTIONS_SINGLE_SOUND=	ALSA PULSEAUDIO
+OPTIONS_DEFAULT+=	ALSA
+
+OPTIONS_DEFINE+=	SYNC
+OPTIONS_DEFAULT+=	SYNC
+
+OPTIONS_DEFINE+=	SYSTEM_MALLOC
+
+ALSA_BUILD_DEPENDS=	${PREFIX}/include/alsa/asoundlib.h:audio/alsa-lib
+ALSA_LIB_DEPENDS=	libasound.so:audio/alsa-lib
+PULSEAUDIO_BUILD_DEPENDS=${LOCALBASE}/include/pulse/pulseaudio.h:audio/pulseaudio
+PULSEAUDIO_LIB_DEPENDS=	libpulse.so:audio/pulseaudio
+
+SYNC_DESC=		Pale Moon Sync service (see https://www.palemoon.org/sync/)
+
+SYSTEM_MALLOC_DESC=	Use system's jemalloc instead of bundled one
+
+.include <bsd.port.pre.mk>
+
+# We require GCC, and even a specific version of it. 10 is the last version I
+# tested and validated, and the last version endorsed upstream. It is also the
+# current default in ports, a nice conjunction that cannot always be
+# maintained. Version bumps *MUST* be validated by the maintainer (after
+# thorough testing, and following upstream's recommendations).
+GCC_DEFAULT=	10
+
+## Vars and targets
+
+UXP_VERSION=	20210608
+
+WRKSRC=		${WRKDIR}/pale-moon
+
+DOT_MOZCONFIG=	${WRKSRC}/.mozconfig
+PM_BUILD_DIR=	${WRKSRC}/pmbuild
+
+PALEMOON_DESKTOP=${WRKSRC}/palemoon/branding/official/palemoon.desktop
+
+# Extract only -O options
+PM_OPTIMIZE=${CFLAGS:M-O*}
+
+.for VAR in PM_BUILD_DIR PM_OPTIMIZE
+PM_MOZCONFIG_REINPLACE_ARGS+=-e 's!%%${VAR}%%!${${VAR}}!'
+.endfor
+
+# Taken from bsd.gecko.mk. See comment there.
+.if defined(DISABLE_MAKE_JOBS) || defined(MAKE_JOBS_UNSAFE)
+MAKE_JOBS_NUMBER=	1
+.endif
+.if defined(MAKE_JOBS_NUMBER)
+MOZ_MAKE_FLAGS+=	-j${MAKE_JOBS_NUMBER}
+.endif
+
+post-extract:
+	${RMDIR} ${WRKSRC}/platform
+	${RLN} ${WRKDIR}/uxp ${WRKSRC}/platform
+
+# Prepare '.mozconfig' for 'configure'
+pre-configure:
+	${CP} ${FILESDIR}/dot.mozconfig ${DOT_MOZCONFIG}
+	${REINPLACE_CMD} ${PM_MOZCONFIG_REINPLACE_ARGS} ${DOT_MOZCONFIG}
+.if ${PORT_OPTIONS:MALSA}
+	${ECHO_CMD} ac_add_options --enable-alsa >> ${DOT_MOZCONFIG}
+	${ECHO_CMD} ac_add_options --disable-pulseaudio >> ${DOT_MOZCONFIG}
+.endif
+.if ! ${PORT_OPTIONS:MSYNC}
+	${ECHO_CMD} ac_add_options --disable-sync >> ${DOT_MOZCONFIG}
+.endif
+.if ${PORT_OPTIONS:MSYSTEM_MALLOC}
+	${ECHO_CMD} ac_add_options --disable-jemalloc >> ${DOT_MOZCONFIG}
+.else
+	${ECHO_CMD} ac_add_options --enable-jemalloc >> ${DOT_MOZCONFIG}
+.endif
+.if defined(MOZ_MAKE_FLAGS)
+	${ECHO_CMD} mk_add_options MOZ_MAKE_FLAGS=${MOZ_MAKE_FLAGS:Q} \
+		>> ${DOT_MOZCONFIG}
+.endif
+# Add build variables
+.for VAR in CPP CXXCPP CC CXX CPPFLAGS CFLAGS CXXFLAGS LDFLAGS \
+	LD AS AR RANLIB OBJDUMP NM
+.if defined(${VAR})
+# Remove -rpath options to GCC's directory, we don't need them (no dependencies
+# on libs compiled with gfortran, see
+# https://wiki.freebsd.org/libgcc%20problem) and we don't want them (triggering
+# a link to a different libgcc_s depending on whether GCC is installed at
+# runtime).
+	${ECHO_CMD} export ${VAR}=\"${${VAR}:N*-rpath*lib/gcc*}\" >> ${DOT_MOZCONFIG}
+.endif
+.endfor
+
+# Running 'mach configure' separately is "strongly discouraged" (see Mozilla's
+# doc on build options configuration). But this does not seem relevant to Pale
+# Moon.
+do-configure:
+	cd ${WRKSRC} && ${SETENV} PATH=${PATH} ./mach configure
+
+do-build:
+	cd ${WRKSRC} && ${SETENV} PATH=${PATH} ./mach build
+# Going through the package route (the only one documented upstream)
+	cd ${WRKSRC} && ${SETENV} PATH=${PATH} ./mach package
+
+do-install:
+	${TAR} -C ${STAGEDIR}${PREFIX}/lib \
+		-xf ${PM_BUILD_DIR:Q}/dist/palemoon*.tar* \
+		palemoon
+	${RLN}  ${STAGEDIR}${PREFIX}/lib/palemoon/palemoon \
+		${STAGEDIR}${PREFIX}/bin/palemoon
+	${INSTALL_DATA} ${PALEMOON_DESKTOP} \
+		${STAGEDIR}${PREFIX}/share/applications/palemoon.desktop
+	${RLN}  ${STAGEDIR}${PREFIX}/lib/palemoon/browser/icons/mozicon128.png \
+		${STAGEDIR}${PREFIX}/share/pixmaps/palemoon.png
+
+.include <bsd.port.mk>
diff --git a/www/palemoon/distinfo b/www/palemoon/distinfo
new file mode 100644
index 000000000000..e0859823b1df
--- /dev/null
+++ b/www/palemoon/distinfo
@@ -0,0 +1,5 @@
+TIMESTAMP = 1623225466
+SHA256 (MoonchildProductions/29.2.1_Release.tar.gz) = 8fbb36e032a6fbb9eb813c9baef3262ca80f8bbd4ae75bac607e70e549a31f2f
+SIZE (MoonchildProductions/29.2.1_Release.tar.gz) = 8527118
+SHA256 (MoonchildProductions/RELBASE_20210608.tar.gz) = 4bf732b952a121baedc79b07eb54ba6f37a146e8c497be73fb71ca34aeb90860
+SIZE (MoonchildProductions/RELBASE_20210608.tar.gz) = 276248112
diff --git a/www/palemoon/files/dot.mozconfig b/www/palemoon/files/dot.mozconfig
new file mode 100644
index 000000000000..dde1b2fe893b
--- /dev/null
+++ b/www/palemoon/files/dot.mozconfig
@@ -0,0 +1,30 @@
+# Standard build options for Pale Moon
+# See http://developer.palemoon.org/build/linux/
+
+# The 'configure' ports step replaces %%VAR%% with content of Makefile's VAR
+# and appends lines to this file.
+
+mk_add_options MOZ_OBJDIR=%%PM_BUILD_DIR%%
+
+ac_add_options --enable-application=palemoon
+ac_add_options --enable-optimize="-w %%PM_OPTIMIZE%%"
+ac_add_options --enable-default-toolkit=cairo-gtk3
+ac_add_options --enable-strip
+ac_add_options --enable-devtools
+ac_add_options --disable-eme
+ac_add_options --disable-webrtc
+ac_add_options --disable-gamepad
+ac_add_options --disable-tests
+ac_add_options --disable-debug
+ac_add_options --disable-necko-wifi
+ac_add_options --disable-updater
+ac_add_options --with-pthreads
+
+ac_add_options --enable-official-branding
+export MOZILLA_OFFICIAL=1
+
+# Don't bother compressing, mach's package is just intermediate file
+export MOZ_PKG_FORMAT=TAR
+
+# Below this line, build options depending on port options, as well as make and
+# build flags, will be appended.
diff --git a/www/palemoon/files/patch-platform_old-configure.in b/www/palemoon/files/patch-platform_old-configure.in
new file mode 100644
index 000000000000..2e9573febffd
--- /dev/null
+++ b/www/palemoon/files/patch-platform_old-configure.in
@@ -0,0 +1,11 @@
+--- platform/old-configure.in.orig	2021-02-05 18:43:01 UTC
++++ platform/old-configure.in
+@@ -5554,7 +5554,7 @@ ac_configure_args="$_SUBDIR_CONFIG_ARGS"
+ 
+ # --with-system-nspr will have been converted into the relevant $NSPR_CFLAGS
+ # and $NSPR_LIBS.
+-ac_configure_args="`echo $ac_configure_args | sed -e 's/--with-system-nspr\S* *//'`"
++ac_configure_args="`echo $ac_configure_args | sed -e 's/--with-system-nspr[^[:space:]]* *//'`"
+ 
+ if test "$_INTL_API" = no; then
+     ac_configure_args="$ac_configure_args --without-intl-api"
diff --git a/www/palemoon/pkg-descr b/www/palemoon/pkg-descr
new file mode 100644
index 000000000000..0ba49faf015d
--- /dev/null
+++ b/www/palemoon/pkg-descr
@@ -0,0 +1,17 @@
+Pale Moon(TM) offers you a browsing experience in a browser completely built
+from its own, independently developed source that has been forked off from
+Firefox/Mozilla code a number of years ago, with carefully selected features
+and optimizations to improve the browser's stability and user experience, while
+offering full customization and a growing collection of extensions and themes
+to make the browser truly your own.
+
+Some of the main features:
+- Based on the Unified XUL Platform (UXP) containing our own optimized layout
+  and rendering engine (Goanna).
+- Safe: Forked from mature Mozilla code and regularly updated with the latest
+  security patches.
+- Secure: Additional security features and security-aware development
+- Zero ads; no telemetry, spyware or data gathering
+- Familiar, efficient, fully customizable interface
+
+WWW: https://www.palemoon.org/
diff --git a/www/palemoon/pkg-plist b/www/palemoon/pkg-plist
new file mode 100644
index 000000000000..877558baf31a
--- /dev/null
+++ b/www/palemoon/pkg-plist
@@ -0,0 +1,57 @@
+bin/palemoon
+lib/palemoon/application.ini
+lib/palemoon/browser/blocklist.xml
+lib/palemoon/browser/chrome.manifest
+lib/palemoon/browser/chrome/icons/default/default16.png
+lib/palemoon/browser/chrome/icons/default/default32.png
+lib/palemoon/browser/chrome/icons/default/default48.png
+lib/palemoon/browser/components/components.manifest
+lib/palemoon/browser/components/libbrowsercomps.so
+lib/palemoon/browser/defaults/profile/chrome/userChrome-example.css
+lib/palemoon/browser/defaults/profile/chrome/userContent-example.css
+lib/palemoon/browser/extensions/{972ce4c6-7e08-4474-a285-3208198ce6fd}.xpi
+lib/palemoon/browser/icons/mozicon128.png
+lib/palemoon/browser/palemoon.res
+lib/palemoon/browser/searchplugins/bing.xml
+lib/palemoon/browser/searchplugins/duckduckgo-palemoon.xml
+lib/palemoon/browser/searchplugins/ecosia.xml
+lib/palemoon/browser/searchplugins/ekoru.xml
+lib/palemoon/browser/searchplugins/twitter.xml
+lib/palemoon/browser/searchplugins/wikipedia.xml
+lib/palemoon/browser/searchplugins/yahoo.xml
+lib/palemoon/browser/ua-update.json
+lib/palemoon/chrome.manifest
+lib/palemoon/defaults/pref/channel-prefs.js
+lib/palemoon/dependentlibs.list
+lib/palemoon/dictionaries/en-US.aff
+lib/palemoon/dictionaries/en-US.dic
+lib/palemoon/gtk2/libmozgtk.so
+lib/palemoon/icudt58l.dat
+lib/palemoon/libfreebl3.chk
+lib/palemoon/libfreebl3.so
+lib/palemoon/liblgpllibs.so
+lib/palemoon/libmozavcodec.so
+lib/palemoon/libmozavutil.so
+lib/palemoon/libmozgtk.so
+lib/palemoon/libmozsqlite3.so
+lib/palemoon/libnspr4.so
+lib/palemoon/libnss3.so
+lib/palemoon/libnssckbi.so
+lib/palemoon/libnssutil3.so
+lib/palemoon/libplc4.so
+lib/palemoon/libplds4.so
+lib/palemoon/libsmime3.so
+lib/palemoon/libsoftokn3.chk
+lib/palemoon/libsoftokn3.so
+lib/palemoon/libssl3.so
+lib/palemoon/libxul.so
+lib/palemoon/palemoon
+lib/palemoon/palemoon-bin
+lib/palemoon/palemoon.res
+lib/palemoon/platform.ini
+lib/palemoon/plugin-container
+lib/palemoon/precomplete
+lib/palemoon/removed-files
+lib/palemoon/run-mozilla.sh
+share/applications/palemoon.desktop
+share/pixmaps/palemoon.png