diff --git a/www-client/icecat/Manifest b/www-client/icecat/Manifest
index 6c69088..7a3745c 100644
--- a/www-client/icecat/Manifest
+++ b/www-client/icecat/Manifest
@@ -1,4 +1,5 @@
 DIST firefox-115esr-patches-09.tar.xz 16660 BLAKE2B 1dcdf62f35013b82dd70bf00c0505394b9277affcd1b1cbde92421778f4fcc146f536a546c2db8d6a70f92d40e4b1c96927fedec54383e6bb80bd9806d9b4461 SHA512 e003d0a2a5304dcdd0851b57ceb11993333326c8221d5d99555cd0c64090d5eda1bdb2a2a52e605f6094a3214ffa2238e43d57ff64eb7d424ff54b8125c16f5c
+DIST icecat-115.10.0-1gnu1.tar.bz2 685091680 BLAKE2B 1d718403fbd71e3e63e907e04008bc00570324b20d6982f6f77d47fe19677810df793b3a587eb30aa65f883058032f7f6d914bb0d58286aa499de3d4db26d3fe SHA512 058ed011b4a1cb45fc6233cc6df798ec66bc9282811394bbb0ca608586cd10ba121c0f035145d6be857b80bf84b55dbcad109c5c98773e6f56432073dca097f3
 DIST icecat-115.8.0-gnu1.tar.bz2 684681764 BLAKE2B d4fee485d605c02dfa7ea98a4d201e94042e76a2cd2e81c1ab06634443904901aec5100b81e52308087821124efe85899c1ec162fed8219af9f56d1ecf01d379 SHA512 3ca88f2315642da799f22daecff1d6ebeef83912cdd54623a3928354f014b8ffd655f902ff2f20c931899f31e840e94bc173f1dc9b1900647762c78a2bd7eca2
 DIST icecat-115.9.0-2gnu1.tar.bz2 684674839 BLAKE2B 2991d7e31cb40a291191e0426037709c2c0d18d2dccf71e4836287c9bfcf022d2a2444ee5298567cfdbdb3be27c576df7f58aafd37ef58964c9231e448e02f2a SHA512 873ec18ee52ac15d8aca7353d09fbd409d436701280f38c3ded3c549bf3fa7468df9825425fefc050c6ddeafaf461f7e06935bc46169348d4b740f239e2db8f1
 DIST icecat-115.9.1-1gnu1.tar.bz2 684700535 BLAKE2B 6d62cd4b70992f77273db89d012ccaa9b13e0c1ed4702b1c801cf10b7600c0abfad374f1ab60f584779418d7bdfdf16b453676c75994ba941434491fc9cef135 SHA512 cc464496d0905267fadc39b80d9125349abc71ff50daeeb92b9a365ee1c003e0dde5bc4c3ab12e2369bb4bf0c7b4b84bb951bd7a17bd84ba5daab0af808705ba
diff --git a/www-client/icecat/icecat-115.10.0.ebuild b/www-client/icecat/icecat-115.10.0.ebuild
new file mode 100644
index 0000000..3e355d9
--- /dev/null
+++ b/www-client/icecat/icecat-115.10.0.ebuild
@@ -0,0 +1,1300 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# Ebuild is based on the Firefox ebuilds in the main repo
+
+EAPI=8
+
+# Using Gentoos firefox patches as system libraries and lto are quite nice
+FIREFOX_PATCHSET="firefox-115esr-patches-09.tar.xz"
+
+LLVM_MAX_SLOT=17
+
+PYTHON_COMPAT=( python3_{10..11} )
+PYTHON_REQ_USE="ncurses,sqlite,ssl"
+
+WANT_AUTOCONF="2.1"
+
+VIRTUALX_REQUIRED="manual"
+
+inherit autotools check-reqs desktop flag-o-matic gnome2-utils linux-info llvm multiprocessing \
+	optfeature pax-utils python-any-r1 readme.gentoo-r1 toolchain-funcs virtualx xdg
+
+DESCRIPTION="GNU IceCat Web Browser"
+HOMEPAGE="https://www.gnu.org/software/gnuzilla/"
+
+PATCH_URIS=(
+	https://dev.gentoo.org/~juippis/mozilla/patchsets/${FIREFOX_PATCHSET}
+)
+
+SRC_URI="
+	https://gitlab.com/api/v4/projects/37881342/packages/generic/${PN}/${PV}/${P}-1gnu1.tar.bz2
+	${PATCH_URIS[@]}
+"
+S="${WORKDIR}/${PN}-${PV%_*}"
+
+LICENSE="MPL-2.0 GPL-2 LGPL-2.1"
+SLOT="0"
+KEYWORDS="~amd64"
+
+IUSE="+clang cpu_flags_arm_neon dbus debug hardened hwaccel"
+IUSE+=" jack libproxy lto openh264 pgo pulseaudio sndio selinux"
+IUSE+=" +system-av1 +system-harfbuzz +system-icu +system-jpeg +system-libevent +system-libvpx system-png system-python-libs +system-webp"
+IUSE+=" wayland wifi +X"
+
+# Firefox-only IUSE
+IUSE+=" geckodriver screencast"
+
+REQUIRED_USE="|| ( X wayland )
+	debug? ( !system-av1 )
+	pgo? ( lto )
+	wifi? ( dbus )"
+
+FF_ONLY_DEPEND="screencast? ( media-video/pipewire:= )
+	selinux? ( sec-policy/selinux-mozilla )"
+BDEPEND="${PYTHON_DEPS}
+	|| (
+		(
+			sys-devel/clang:17
+			sys-devel/llvm:17
+			clang? (
+				sys-devel/lld:17
+				virtual/rust:0/llvm-17
+				pgo? ( =sys-libs/compiler-rt-sanitizers-17*[profile] )
+			)
+		)
+		(
+			sys-devel/clang:16
+			sys-devel/llvm:16
+			clang? (
+				sys-devel/lld:16
+				virtual/rust:0/llvm-16
+				pgo? ( =sys-libs/compiler-rt-sanitizers-16*[profile] )
+			)
+		)
+	)
+	app-alternatives/awk
+	app-arch/unzip
+	app-arch/zip
+	>=dev-util/cbindgen-0.24.3
+	net-libs/nodejs
+	virtual/pkgconfig
+	!clang? ( >=virtual/rust-1.65 )
+	!elibc_glibc? (
+		|| (
+			dev-lang/rust
+			<dev-lang/rust-bin-1.73
+		)
+	)
+	amd64? ( >=dev-lang/nasm-2.14 )
+	x86? ( >=dev-lang/nasm-2.14 )
+	pgo? (
+		X? (
+			sys-devel/gettext
+			x11-base/xorg-server[xvfb]
+			x11-apps/xhost
+		)
+		!X? (
+			>=gui-libs/wlroots-0.15.1-r1[tinywl]
+			x11-misc/xkeyboard-config
+		)
+	)"
+COMMON_DEPEND="${FF_ONLY_DEPEND}
+	>=app-accessibility/at-spi2-core-2.46.0:2
+	dev-libs/expat
+	dev-libs/glib:2
+	dev-libs/libffi:=
+	>=dev-libs/nss-3.90
+	>=dev-libs/nspr-4.35
+	media-libs/alsa-lib
+	media-libs/fontconfig
+	media-libs/freetype
+	media-libs/mesa
+	media-video/ffmpeg
+	sys-libs/zlib
+	virtual/freedesktop-icon-theme
+	x11-libs/cairo
+	x11-libs/gdk-pixbuf
+	x11-libs/pango
+	x11-libs/pixman
+	dbus? (
+		dev-libs/dbus-glib
+		sys-apps/dbus
+	)
+	jack? ( virtual/jack )
+	pulseaudio? (
+		|| (
+			media-libs/libpulse
+			>=media-sound/apulse-0.1.12-r4[sdk]
+		)
+	)
+	libproxy? ( net-libs/libproxy )
+	selinux? ( sec-policy/selinux-mozilla )
+	sndio? ( >=media-sound/sndio-1.8.0-r1 )
+	screencast? ( media-video/pipewire:= )
+	system-av1? (
+		>=media-libs/dav1d-1.0.0:=
+		>=media-libs/libaom-1.0.0:=
+	)
+	system-harfbuzz? (
+		>=media-gfx/graphite2-1.3.13
+		>=media-libs/harfbuzz-2.8.1:0=
+	)
+	system-icu? ( >=dev-libs/icu-73.1:= )
+	system-jpeg? ( >=media-libs/libjpeg-turbo-1.2.1 )
+	system-libevent? ( >=dev-libs/libevent-2.1.12:0=[threads(+)] )
+	system-libvpx? ( >=media-libs/libvpx-1.8.2:0=[postproc] )
+	system-png? ( >=media-libs/libpng-1.6.35:0=[apng] )
+	system-webp? ( >=media-libs/libwebp-1.1.0:0= )
+	wayland? (
+		>=media-libs/libepoxy-1.5.10-r1
+		x11-libs/gtk+:3[wayland]
+		x11-libs/libxkbcommon[wayland]
+	)
+	wifi? (
+		kernel_linux? (
+			dev-libs/dbus-glib
+			net-misc/networkmanager
+			sys-apps/dbus
+		)
+	)
+	X? (
+		virtual/opengl
+		x11-libs/cairo[X]
+		x11-libs/gtk+:3[X]
+		x11-libs/libX11
+		x11-libs/libXcomposite
+		x11-libs/libXdamage
+		x11-libs/libXext
+		x11-libs/libXfixes
+		x11-libs/libxkbcommon[X]
+		x11-libs/libXrandr
+		x11-libs/libXtst
+		x11-libs/libxcb:=
+	)"
+RDEPEND="${COMMON_DEPEND}
+	hwaccel? (
+		media-video/libva-utils
+		sys-apps/pciutils
+	)
+	jack? ( virtual/jack )
+	openh264? ( media-libs/openh264:*[plugin] )"
+DEPEND="${COMMON_DEPEND}
+	X? (
+		x11-base/xorg-proto
+		x11-libs/libICE
+		x11-libs/libSM
+	)"
+
+llvm_check_deps() {
+	if ! has_version -b "sys-devel/clang:${LLVM_SLOT}" ; then
+		einfo "sys-devel/clang:${LLVM_SLOT} is missing! Cannot use LLVM slot ${LLVM_SLOT} ..." >&2
+		return 1
+	fi
+
+	if use clang && ! tc-ld-is-mold ; then
+		if ! has_version -b "sys-devel/lld:${LLVM_SLOT}" ; then
+			einfo "sys-devel/lld:${LLVM_SLOT} is missing! Cannot use LLVM slot ${LLVM_SLOT} ..." >&2
+			return 1
+		fi
+
+		if ! has_version -b "virtual/rust:0/llvm-${LLVM_SLOT}" ; then
+			einfo "virtual/rust:0/llvm-${LLVM_SLOT} is missing! Cannot use LLVM slot ${LLVM_SLOT} ..." >&2
+			return 1
+		fi
+
+		if use pgo ; then
+			if ! has_version -b "=sys-libs/compiler-rt-sanitizers-${LLVM_SLOT}*[profile]" ; then
+				einfo "=sys-libs/compiler-rt-sanitizers-${LLVM_SLOT}*[profile] is missing! Cannot use LLVM slot ${LLVM_SLOT} ..." >&2
+				return 1
+			fi
+		fi
+	fi
+
+	einfo "Using LLVM slot ${LLVM_SLOT} to build" >&2
+}
+
+MOZ_LANGS=(
+	af ar ast be bg br ca cak cs cy da de dsb
+	el en-CA en-GB en-US es-AR es-ES et eu
+	fi fr fy-NL ga-IE gd gl he hr hsb hu
+	id is it ja ka kab kk ko lt lv ms nb-NO nl nn-NO
+	pa-IN pl pt-BR pt-PT rm ro ru
+	sk sl sq sr sv-SE th tr uk uz vi zh-CN zh-TW
+)
+
+# Firefox-only LANGS
+MOZ_LANGS+=( ach )
+MOZ_LANGS+=( an )
+MOZ_LANGS+=( az )
+MOZ_LANGS+=( bn )
+MOZ_LANGS+=( bs )
+MOZ_LANGS+=( ca-valencia )
+MOZ_LANGS+=( eo )
+MOZ_LANGS+=( es-CL )
+MOZ_LANGS+=( es-MX )
+MOZ_LANGS+=( fa )
+MOZ_LANGS+=( ff )
+MOZ_LANGS+=( fur )
+MOZ_LANGS+=( gn )
+MOZ_LANGS+=( gu-IN )
+MOZ_LANGS+=( hi-IN )
+MOZ_LANGS+=( hy-AM )
+MOZ_LANGS+=( ia )
+MOZ_LANGS+=( km )
+MOZ_LANGS+=( kn )
+MOZ_LANGS+=( lij )
+MOZ_LANGS+=( mk )
+MOZ_LANGS+=( mr )
+MOZ_LANGS+=( my )
+MOZ_LANGS+=( ne-NP )
+MOZ_LANGS+=( oc )
+MOZ_LANGS+=( sc )
+MOZ_LANGS+=( sco )
+MOZ_LANGS+=( si )
+MOZ_LANGS+=( son )
+MOZ_LANGS+=( szl )
+MOZ_LANGS+=( ta )
+MOZ_LANGS+=( te )
+MOZ_LANGS+=( tl )
+MOZ_LANGS+=( trs )
+MOZ_LANGS+=( ur )
+MOZ_LANGS+=( xh )
+
+mozilla_set_globals() {
+	# https://bugs.gentoo.org/587334
+	local MOZ_TOO_REGIONALIZED_FOR_L10N=(
+		fy-NL ga-IE gu-IN hi-IN hy-AM nb-NO ne-NP nn-NO pa-IN sv-SE
+	)
+
+	local lang xflag
+	for lang in "${MOZ_LANGS[@]}" ; do
+		# en and en_US are handled internally
+		if [[ ${lang} == en ]] || [[ ${lang} == en-US ]] ; then
+			continue
+		fi
+
+		# strip region subtag if $lang is in the list
+		if has ${lang} "${MOZ_TOO_REGIONALIZED_FOR_L10N[@]}" ; then
+			xflag=${lang%%-*}
+		else
+			xflag=${lang}
+		fi
+
+		IUSE+=" l10n_${xflag/[_@]/-}"
+	done
+}
+mozilla_set_globals
+
+moz_clear_vendor_checksums() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	if [[ ${#} -ne 1 ]] ; then
+		die "${FUNCNAME} requires exact one argument"
+	fi
+
+	einfo "Clearing cargo checksums for ${1} ..."
+
+	sed -i \
+		-e 's/\("files":{\)[^}]*/\1/' \
+		"${S}"/third_party/rust/${1}/.cargo-checksum.json \
+		|| die
+}
+
+moz_build_xpi() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	local MOZ_TOO_REGIONALIZED_FOR_L10N=(
+		fy-NL ga-IE gu-IN hi-IN hy-AM nb-NO ne-NP nn-NO pa-IN sv-SE
+	)
+
+	cd "${BUILD_DIR}"/browser/locales || die
+	local lang xflag
+	for lang in "${MOZ_LANGS[@]}"; do
+		# en and en_US are handled internally
+		if [[ ${lang} == en ]] || [[ ${lang} == en-US ]] ; then
+			continue
+		fi
+
+		# strip region subtag if $lang is in the list
+		if has ${lang} "${MOZ_TOO_REGIONALIZED_FOR_L10N[@]}" ; then
+			xflag=${lang%%-*}
+		else
+			xflag=${lang}
+		fi
+
+		if use l10n_"${xflag}"; then
+			emake langpack-"${lang}" LOCALE_MERGEDIR=.
+		fi
+	done
+}
+
+moz_install_xpi() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	if [[ ${#} -lt 2 ]] ; then
+		die "${FUNCNAME} requires at least two arguments"
+	fi
+
+	local DESTDIR=${1}
+	shift
+
+	insinto "${DESTDIR}"
+
+	local emid xpi_file xpi_tmp_dir
+	for xpi_file in "${@}" ; do
+		emid=
+		xpi_tmp_dir=$(mktemp -d --tmpdir="${T}")
+
+		# Unpack XPI
+		unzip -qq "${xpi_file}" -d "${xpi_tmp_dir}" || die
+
+		# Determine extension ID
+		if [[ -f "${xpi_tmp_dir}/install.rdf" ]] ; then
+			emid=$(sed -n -e '/install-manifest/,$ { /em:id/!d; s/.*[\">]\([^\"<>]*\)[\"<].*/\1/; p; q }' "${xpi_tmp_dir}/install.rdf")
+			[[ -z "${emid}" ]] && die "failed to determine extension id from install.rdf"
+		elif [[ -f "${xpi_tmp_dir}/manifest.json" ]] ; then
+			emid=$(sed -n -e 's/.*"id": "\([^"]*\)".*/\1/p' "${xpi_tmp_dir}/manifest.json")
+			[[ -z "${emid}" ]] && die "failed to determine extension id from manifest.json"
+		else
+			die "failed to determine extension id"
+		fi
+
+		einfo "Installing ${emid}.xpi into ${ED}${DESTDIR} ..."
+		newins "${xpi_file}" "${emid}.xpi"
+	done
+}
+
+mozconfig_add_options_ac() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	if [[ ${#} -lt 2 ]] ; then
+		die "${FUNCNAME} requires at least two arguments"
+	fi
+
+	local reason=${1}
+	shift
+
+	local option
+	for option in ${@} ; do
+		echo "ac_add_options ${option} # ${reason}" >>${MOZCONFIG}
+	done
+}
+
+mozconfig_add_options_mk() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	if [[ ${#} -lt 2 ]] ; then
+		die "${FUNCNAME} requires at least two arguments"
+	fi
+
+	local reason=${1}
+	shift
+
+	local option
+	for option in ${@} ; do
+		echo "mk_add_options ${option} # ${reason}" >>${MOZCONFIG}
+	done
+}
+
+mozconfig_use_enable() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	if [[ ${#} -lt 1 ]] ; then
+		die "${FUNCNAME} requires at least one arguments"
+	fi
+
+	local flag=$(use_enable "${@}")
+	mozconfig_add_options_ac "$(use ${1} && echo +${1} || echo -${1})" "${flag}"
+}
+
+mozconfig_use_with() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	if [[ ${#} -lt 1 ]] ; then
+		die "${FUNCNAME} requires at least one arguments"
+	fi
+
+	local flag=$(use_with "${@}")
+	mozconfig_add_options_ac "$(use ${1} && echo +${1} || echo -${1})" "${flag}"
+}
+
+# This is a straight copypaste from toolchain-funcs.eclass's 'tc-ld-is-lld', and is temporarily
+# placed here until toolchain-funcs.eclass gets an official support for mold linker.
+# Please see:
+# https://github.com/gentoo/gentoo/pull/28366 ||
+# https://github.com/gentoo/gentoo/pull/28355
+tc-ld-is-mold() {
+	local out
+
+	# Ensure ld output is in English.
+	local -x LC_ALL=C
+
+	# First check the linker directly.
+	out=$($(tc-getLD "$@") --version 2>&1)
+	if [[ ${out} == *"mold"* ]] ; then
+		return 0
+	fi
+
+	# Then see if they're selecting mold via compiler flags.
+	# Note: We're assuming they're using LDFLAGS to hold the
+	# options and not CFLAGS/CXXFLAGS.
+	local base="${T}/test-tc-linker"
+	cat <<-EOF > "${base}.c"
+	int main() { return 0; }
+	EOF
+	out=$($(tc-getCC "$@") ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} -Wl,--version "${base}.c" -o "${base}" 2>&1)
+	rm -f "${base}"*
+	if [[ ${out} == *"mold"* ]] ; then
+		return 0
+	fi
+
+	# No mold here!
+	return 1
+}
+
+virtwl() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	[[ $# -lt 1 ]] && die "${FUNCNAME} needs at least one argument"
+	[[ -n $XDG_RUNTIME_DIR ]] || die "${FUNCNAME} needs XDG_RUNTIME_DIR to be set; try xdg_environment_reset"
+	tinywl -h >/dev/null || die 'tinywl -h failed'
+
+	# TODO: don't run addpredict in utility function. WLR_RENDERER=pixman doesn't work
+	addpredict /dev/dri
+	local VIRTWL VIRTWL_PID
+	coproc VIRTWL { WLR_BACKENDS=headless exec tinywl -s 'echo $WAYLAND_DISPLAY; read _; kill $PPID'; }
+	local -x WAYLAND_DISPLAY
+	read WAYLAND_DISPLAY <&${VIRTWL[0]}
+
+	debug-print "${FUNCNAME}: $@"
+	"$@"
+	local r=$?
+
+	[[ -n $VIRTWL_PID ]] || die "tinywl exited unexpectedly"
+	exec {VIRTWL[0]}<&- {VIRTWL[1]}>&-
+	return $r
+}
+
+pkg_pretend() {
+	if [[ ${MERGE_TYPE} != binary ]] ; then
+		if use pgo ; then
+			if ! has usersandbox $FEATURES ; then
+				die "You must enable usersandbox as X server can not run as root!"
+			fi
+		fi
+
+		# Ensure we have enough disk space to compile
+		if use pgo || use lto || use debug ; then
+			CHECKREQS_DISK_BUILD="13500M"
+		else
+			CHECKREQS_DISK_BUILD="6600M"
+		fi
+
+		check-reqs_pkg_pretend
+	fi
+}
+
+pkg_setup() {
+	if [[ ${MERGE_TYPE} != binary ]] ; then
+		if use pgo ; then
+			if ! has userpriv ${FEATURES} ; then
+				eerror "Building ${PN} with USE=pgo and FEATURES=-userpriv is not supported!"
+			fi
+		fi
+
+		# Ensure we have enough disk space to compile
+		if use pgo || use lto || use debug ; then
+			CHECKREQS_DISK_BUILD="13500M"
+		else
+			CHECKREQS_DISK_BUILD="6400M"
+		fi
+
+		check-reqs_pkg_setup
+
+		llvm_pkg_setup
+
+		if use clang && use lto && tc-ld-is-lld ; then
+			local version_lld=$(ld.lld --version 2>/dev/null | awk '{ print $2 }')
+			[[ -n ${version_lld} ]] && version_lld=$(ver_cut 1 "${version_lld}")
+			[[ -z ${version_lld} ]] && die "Failed to read ld.lld version!"
+
+			local version_llvm_rust=$(rustc -Vv 2>/dev/null | grep -F -- 'LLVM version:' | awk '{ print $3 }')
+			[[ -n ${version_llvm_rust} ]] && version_llvm_rust=$(ver_cut 1 "${version_llvm_rust}")
+			[[ -z ${version_llvm_rust} ]] && die "Failed to read used LLVM version from rustc!"
+
+			if ver_test "${version_lld}" -ne "${version_llvm_rust}" ; then
+				eerror "Rust is using LLVM version ${version_llvm_rust} but ld.lld version belongs to LLVM version ${version_lld}."
+				eerror "You will be unable to link ${CATEGORY}/${PN}. To proceed you have the following options:"
+				eerror "  - Manually switch rust version using 'eselect rust' to match used LLVM version"
+				eerror "  - Switch to dev-lang/rust[system-llvm] which will guarantee matching version"
+				eerror "  - Build ${CATEGORY}/${PN} without USE=lto"
+				eerror "  - Rebuild lld with llvm that was used to build rust (may need to rebuild the whole "
+				eerror "    llvm/clang/lld/rust chain depending on your @world updates)"
+				die "LLVM version used by Rust (${version_llvm_rust}) does not match with ld.lld version (${version_lld})!"
+			fi
+		fi
+
+		python-any-r1_pkg_setup
+
+		# Avoid PGO profiling problems due to enviroment leakage
+		# These should *always* be cleaned up anyway
+		unset \
+			DBUS_SESSION_BUS_ADDRESS \
+			DISPLAY \
+			ORBIT_SOCKETDIR \
+			SESSION_MANAGER \
+			XAUTHORITY \
+			XDG_CACHE_HOME \
+			XDG_SESSION_COOKIE
+
+		# Build system is using /proc/self/oom_score_adj, bug #604394
+		addpredict /proc/self/oom_score_adj
+
+		if use pgo ; then
+			# Update 105.0: "/proc/self/oom_score_adj" isn't enough anymore with pgo, but not sure
+			# whether that's due to better OOM handling by Firefox (bmo#1771712), or portage
+			# (PORTAGE_SCHEDULING_POLICY) update...
+			addpredict /proc
+
+			# May need a wider addpredict when using wayland+pgo.
+			addpredict /dev/dri
+
+			# Allow access to GPU during PGO run
+			local ati_cards mesa_cards nvidia_cards render_cards
+			shopt -s nullglob
+
+			ati_cards=$(echo -n /dev/ati/card* | sed 's/ /:/g')
+			if [[ -n "${ati_cards}" ]] ; then
+				addpredict "${ati_cards}"
+			fi
+
+			mesa_cards=$(echo -n /dev/dri/card* | sed 's/ /:/g')
+			if [[ -n "${mesa_cards}" ]] ; then
+				addpredict "${mesa_cards}"
+			fi
+
+			nvidia_cards=$(echo -n /dev/nvidia* | sed 's/ /:/g')
+			if [[ -n "${nvidia_cards}" ]] ; then
+				addpredict "${nvidia_cards}"
+			fi
+
+			render_cards=$(echo -n /dev/dri/renderD128* | sed 's/ /:/g')
+			if [[ -n "${render_cards}" ]] ; then
+				addpredict "${render_cards}"
+			fi
+
+			shopt -u nullglob
+		fi
+
+		if ! mountpoint -q /dev/shm ; then
+			# If /dev/shm is not available, configure is known to fail with
+			# a traceback report referencing /usr/lib/pythonN.N/multiprocessing/synchronize.py
+			ewarn "/dev/shm is not mounted -- expect build failures!"
+		fi
+
+		# Ensure we use C locale when building, bug #746215
+		export LC_ALL=C
+	fi
+
+	linux-info_pkg_setup
+}
+
+src_prepare() {
+	if use lto; then
+		rm -v "${WORKDIR}"/firefox-patches/*-LTO-Only-enable-LTO-*.patch || die
+	fi
+
+	if ! use ppc64; then
+		rm -v "${WORKDIR}"/firefox-patches/*ppc64*.patch || die
+	fi
+
+	if use x86 && use elibc_glibc ; then
+		rm -v "${WORKDIR}"/firefox-patches/*-musl-non-lfs64-api-on-audio_thread_priority-crate.patch || die
+	fi
+
+	# Workaround for bgo#917599
+	if has_version ">=dev-libs/icu-74.1" && use system-icu ; then
+		eapply "${WORKDIR}"/firefox-patches/0029-bmo-1862601-system-icu-74.patch
+	fi
+	rm -v "${WORKDIR}"/firefox-patches/0029-bmo-1862601-system-icu-74.patch || die
+
+	# Workaround for bgo#915651 on musl
+	if use elibc_glibc ; then
+		rm -v "${WORKDIR}"/firefox-patches/*bgo-748849-RUST_TARGET_override.patch || die
+	fi
+
+	eapply "${WORKDIR}/firefox-patches"
+
+	# Allow user to apply any additional patches without modifing ebuild
+	eapply_user
+
+	# Make cargo respect MAKEOPTS
+	export CARGO_BUILD_JOBS="$(makeopts_jobs)"
+
+	# Workaround for bgo#915651
+	if ! use elibc_glibc ; then
+		if use amd64 ; then
+			export RUST_TARGET="x86_64-unknown-linux-musl"
+		elif use x86 ; then
+			export RUST_TARGET="i686-unknown-linux-musl"
+		else
+			die "Unknown musl chost, please post your rustc -vV along with emerge --info on Gentoo's bug #915651"
+		fi
+	fi
+
+	# Make LTO respect MAKEOPTS
+	sed -i \
+		-e "s/multiprocessing.cpu_count()/$(makeopts_jobs)/" \
+		"${S}"/build/moz.configure/lto-pgo.configure \
+		|| die "sed failed to set num_cores"
+
+	# Make ICU respect MAKEOPTS
+	sed -i \
+		-e "s/multiprocessing.cpu_count()/$(makeopts_jobs)/" \
+		"${S}"/intl/icu_sources_data.py \
+		|| die "sed failed to set num_cores"
+
+	# sed-in toolchain prefix
+	sed -i \
+		-e "s/objdump/${CHOST}-objdump/" \
+		"${S}"/python/mozbuild/mozbuild/configure/check_debug_ranges.py \
+		|| die "sed failed to set toolchain prefix"
+
+	sed -i \
+		-e 's/ccache_stats = None/return None/' \
+		"${S}"/python/mozbuild/mozbuild/controller/building.py \
+		|| die "sed failed to disable ccache stats call"
+
+	einfo "Removing pre-built binaries ..."
+
+	find "${S}"/third_party -type f \( -name '*.so' -o -name '*.o' \) -print -delete || die
+
+	# Clear cargo checksums from crates we have patched
+	# moz_clear_vendor_checksums crate
+	moz_clear_vendor_checksums audio_thread_priority
+
+	# Create build dir
+	BUILD_DIR="${WORKDIR}/${PN}_build"
+	mkdir -p "${BUILD_DIR}" || die
+
+	xdg_environment_reset
+}
+
+src_configure() {
+	# Show flags set at the beginning
+	einfo "Current BINDGEN_CFLAGS:\t${BINDGEN_CFLAGS:-no value set}"
+	einfo "Current CFLAGS:\t\t${CFLAGS:-no value set}"
+	einfo "Current CXXFLAGS:\t\t${CXXFLAGS:-no value set}"
+	einfo "Current LDFLAGS:\t\t${LDFLAGS:-no value set}"
+	einfo "Current RUSTFLAGS:\t\t${RUSTFLAGS:-no value set}"
+
+	local have_switched_compiler=
+	if use clang; then
+		# Force clang
+		einfo "Enforcing the use of clang due to USE=clang ..."
+
+		local version_clang=$(clang --version 2>/dev/null | grep -F -- 'clang version' | awk '{ print $3 }')
+		[[ -n ${version_clang} ]] && version_clang=$(ver_cut 1 "${version_clang}")
+		[[ -z ${version_clang} ]] && die "Failed to read clang version!"
+
+		if tc-is-gcc; then
+			have_switched_compiler=yes
+		fi
+
+		AR=llvm-ar
+		CC=${CHOST}-clang-${version_clang}
+		CXX=${CHOST}-clang++-${version_clang}
+		NM=llvm-nm
+		RANLIB=llvm-ranlib
+
+	elif ! use clang && ! tc-is-gcc ; then
+		# Force gcc
+		have_switched_compiler=yes
+		einfo "Enforcing the use of gcc due to USE=-clang ..."
+		AR=gcc-ar
+		CC=${CHOST}-gcc
+		CXX=${CHOST}-g++
+		NM=gcc-nm
+		RANLIB=gcc-ranlib
+	fi
+
+	if [[ -n "${have_switched_compiler}" ]] ; then
+		# Because we switched active compiler we have to ensure
+		# that no unsupported flags are set
+		strip-unsupported-flags
+	fi
+
+	# Ensure we use correct toolchain,
+	# AS is used in a non-standard way by upstream, #bmo1654031
+	export HOST_CC="$(tc-getBUILD_CC)"
+	export HOST_CXX="$(tc-getBUILD_CXX)"
+	export AS="$(tc-getCC) -c"
+	tc-export CC CXX LD AR AS NM OBJDUMP RANLIB PKG_CONFIG
+
+	# Pass the correct toolchain paths through cbindgen
+	if tc-is-cross-compiler ; then
+		export BINDGEN_CFLAGS="${SYSROOT:+--sysroot=${ESYSROOT}} --target=${CHOST} ${BINDGEN_CFLAGS-}"
+	fi
+
+	# Set MOZILLA_FIVE_HOME
+	export MOZILLA_FIVE_HOME="/usr/$(get_libdir)/${PN}"
+
+	# python/mach/mach/mixin/process.py fails to detect SHELL
+	export SHELL="${EPREFIX}/bin/bash"
+
+	# Set state path
+	export MOZBUILD_STATE_PATH="${BUILD_DIR}"
+
+	# Set MOZCONFIG
+	export MOZCONFIG="${S}/.mozconfig"
+
+	# Initialize MOZCONFIG
+	mozconfig_add_options_ac '' --enable-application=browser
+	mozconfig_add_options_ac '' --enable-project=browser
+
+	# Set Gentoo defaults
+	mozconfig_add_options_ac 'Gentoo default' \
+		--allow-addon-sideload \
+		--disable-cargo-incremental \
+		--disable-crashreporter \
+		--disable-eme \
+		--disable-gpsd \
+		--disable-install-strip \
+		--disable-parental-controls \
+		--disable-strip \
+		--disable-tests \
+		--disable-updater \
+		--disable-wmf \
+		--enable-legacy-profile-creation \
+		--enable-negotiateauth \
+		--enable-new-pass-manager \
+		--enable-official-branding \
+		--enable-release \
+		--enable-system-ffi \
+		--enable-system-pixman \
+		--enable-system-policies \
+		--host="${CBUILD:-${CHOST}}" \
+		--libdir="${EPREFIX}/usr/$(get_libdir)" \
+		--prefix="${EPREFIX}/usr" \
+		--target="${CHOST}" \
+		--without-ccache \
+		--without-wasm-sandboxed-libraries \
+		--with-intl-api \
+		--with-l10n-base="${S}/l10n" \
+		--with-libclang-path="$(llvm-config --libdir)" \
+		--with-system-nspr \
+		--with-system-nss \
+		--with-system-zlib \
+		--with-toolchain-prefix="${CHOST}-" \
+		--with-unsigned-addon-scopes=app,system \
+		--x-includes="${ESYSROOT}/usr/include" \
+		--x-libraries="${ESYSROOT}/usr/$(get_libdir)"
+
+	mozconfig_add_options_ac '' --update-channel=esr
+
+	if ! use x86 && [[ ${CHOST} != armv*h* ]] ; then
+		mozconfig_add_options_ac '' --enable-rust-simd
+	fi
+
+	# For future keywording: This is currently (97.0) only supported on:
+	# amd64, arm, arm64 & x86.
+	# Might want to flip the logic around if Firefox is to support more arches.
+	# bug 833001, bug 903411#c8
+	if use ppc64 || use riscv; then
+		mozconfig_add_options_ac '' --disable-sandbox
+	else
+		mozconfig_add_options_ac '' --enable-sandbox
+	fi
+
+	# Enable JIT on riscv64 explicitly
+	# Can be removed once upstream enable it by default in the future.
+	use riscv && mozconfig_add_options_ac 'Enable JIT for RISC-V 64' --enable-jit
+
+	mozconfig_use_with system-av1
+	mozconfig_use_with system-harfbuzz
+	mozconfig_use_with system-harfbuzz system-graphite2
+	mozconfig_use_with system-icu
+	mozconfig_use_with system-jpeg
+	mozconfig_use_with system-libevent
+	mozconfig_use_with system-libvpx
+	mozconfig_use_with system-png
+	mozconfig_use_with system-webp
+
+	mozconfig_use_enable dbus
+	mozconfig_use_enable libproxy
+
+	mozconfig_use_enable geckodriver
+
+	if use hardened ; then
+		mozconfig_add_options_ac "+hardened" --enable-hardening
+		append-ldflags "-Wl,-z,relro -Wl,-z,now"
+	fi
+
+	local myaudiobackends=""
+	use jack && myaudiobackends+="jack,"
+	use sndio && myaudiobackends+="sndio,"
+	use pulseaudio && myaudiobackends+="pulseaudio,"
+	! use pulseaudio && myaudiobackends+="alsa,"
+
+	mozconfig_add_options_ac '--enable-audio-backends' --enable-audio-backends="${myaudiobackends::-1}"
+
+	mozconfig_use_enable wifi necko-wifi
+
+	if use X && use wayland ; then
+		mozconfig_add_options_ac '+x11+wayland' --enable-default-toolkit=cairo-gtk3-x11-wayland
+	elif ! use X && use wayland ; then
+		mozconfig_add_options_ac '+wayland' --enable-default-toolkit=cairo-gtk3-wayland-only
+	else
+		mozconfig_add_options_ac '+x11' --enable-default-toolkit=cairo-gtk3
+	fi
+
+	if use lto ; then
+		if use clang ; then
+			# Upstream only supports lld or mold when using clang.
+			if tc-ld-is-mold ; then
+				mozconfig_add_options_ac "using ld=mold due to system selection" --enable-linker=mold
+			else
+				mozconfig_add_options_ac "forcing ld=lld due to USE=clang and USE=lto" --enable-linker=lld
+			fi
+
+			mozconfig_add_options_ac '+lto' --enable-lto=cross
+
+		else
+			# ThinLTO is currently broken, see bmo#1644409.
+			# mold does not support gcc+lto combination.
+			mozconfig_add_options_ac '+lto' --enable-lto=full
+			mozconfig_add_options_ac "linker is set to bfd" --enable-linker=bfd
+		fi
+
+		if use pgo ; then
+			mozconfig_add_options_ac '+pgo' MOZ_PGO=1
+
+			if use clang ; then
+				# Used in build/pgo/profileserver.py
+				export LLVM_PROFDATA="llvm-profdata"
+			fi
+		fi
+	else
+		# Avoid auto-magic on linker
+		if use clang ; then
+			# lld is upstream's default
+			if tc-ld-is-mold ; then
+				mozconfig_add_options_ac "using ld=mold due to system selection" --enable-linker=mold
+			else
+				mozconfig_add_options_ac "forcing ld=lld due to USE=clang" --enable-linker=lld
+			fi
+
+		else
+			if tc-ld-is-mold ; then
+				mozconfig_add_options_ac "using ld=mold due to system selection" --enable-linker=mold
+			else
+				mozconfig_add_options_ac "linker is set to bfd due to USE=-clang" --enable-linker=bfd
+			fi
+		fi
+	fi
+
+	# LTO flag was handled via configure
+	filter-lto
+
+	mozconfig_use_enable debug
+	if use debug ; then
+		mozconfig_add_options_ac '+debug' --disable-optimize
+		mozconfig_add_options_ac '+debug' --enable-real-time-tracing
+	else
+		mozconfig_add_options_ac 'Gentoo defaults' --disable-real-time-tracing
+
+		if is-flag '-g*' ; then
+			if use clang ; then
+				mozconfig_add_options_ac 'from CFLAGS' --enable-debug-symbols=$(get-flag '-g*')
+			else
+				mozconfig_add_options_ac 'from CFLAGS' --enable-debug-symbols
+			fi
+		else
+			mozconfig_add_options_ac 'Gentoo default' --disable-debug-symbols
+		fi
+
+		if is-flag '-O0' ; then
+			mozconfig_add_options_ac "from CFLAGS" --enable-optimize=-O0
+		elif is-flag '-O4' ; then
+			mozconfig_add_options_ac "from CFLAGS" --enable-optimize=-O4
+		elif is-flag '-O3' ; then
+			mozconfig_add_options_ac "from CFLAGS" --enable-optimize=-O3
+		elif is-flag '-O1' ; then
+			mozconfig_add_options_ac "from CFLAGS" --enable-optimize=-O1
+		elif is-flag '-Os' ; then
+			mozconfig_add_options_ac "from CFLAGS" --enable-optimize=-Os
+		else
+			mozconfig_add_options_ac "Gentoo default" --enable-optimize=-O2
+		fi
+	fi
+
+	# Debug flag was handled via configure
+	filter-flags '-g*'
+
+	# Optimization flag was handled via configure
+	filter-flags '-O*'
+
+	# Modifications to better support ARM, bug #553364
+	if use cpu_flags_arm_neon ; then
+		mozconfig_add_options_ac '+cpu_flags_arm_neon' --with-fpu=neon
+
+		if ! tc-is-clang ; then
+			# thumb options aren't supported when using clang, bug 666966
+			mozconfig_add_options_ac '+cpu_flags_arm_neon' \
+				--with-thumb=yes \
+				--with-thumb-interwork=no
+		fi
+	fi
+
+	if [[ ${CHOST} == armv*h* ]] ; then
+		mozconfig_add_options_ac 'CHOST=armv*h*' --with-float-abi=hard
+
+		if ! use system-libvpx ; then
+			sed -i \
+				-e "s|softfp|hard|" \
+				"${S}"/media/libvpx/moz.build \
+				|| die
+		fi
+	fi
+
+	# With profile 23.0 elf-hack=legacy is broken with gcc.
+	# With Firefox-115esr elf-hack=relr isn't available (only in rapid).
+	# Solution: Disable build system's elf-hack completely, and add "-z,pack-relative-relocs"
+	#  manually with gcc.
+	#
+	# elf-hack configure option isn't available on ppc64/riscv, #916259, #929244, #930046.
+	if use ppc64 || use riscv ; then
+		:;
+	else
+		mozconfig_add_options_ac 'elf-hack disabled' --disable-elf-hack
+	fi
+
+	if use amd64 || use x86 ; then
+		! use clang && append-ldflags "-z,pack-relative-relocs"
+	fi
+
+	# Additional ARCH support
+	case "${ARCH}" in
+		arm)
+			# Reduce the memory requirements for linking
+			if use clang ; then
+				# Nothing to do
+				:;
+			elif use lto ; then
+				append-ldflags -Wl,--no-keep-memory
+			else
+				append-ldflags -Wl,--no-keep-memory -Wl,--reduce-memory-overheads
+			fi
+			;;
+	esac
+
+	if ! use elibc_glibc; then
+		mozconfig_add_options_ac '!elibc_glibc' --disable-jemalloc
+	fi
+
+	# Allow elfhack to work in combination with unstripped binaries
+	# when they would normally be larger than 2GiB.
+	append-ldflags "-Wl,--compress-debug-sections=zlib"
+
+	# Make revdep-rebuild.sh happy; Also required for musl
+	append-ldflags -Wl,-rpath="${MOZILLA_FIVE_HOME}",--enable-new-dtags
+
+	# Pass $MAKEOPTS to build system
+	export MOZ_MAKE_FLAGS="${MAKEOPTS}"
+
+	# Use system's Python environment
+	export PIP_NETWORK_INSTALL_RESTRICTED_VIRTUALENVS=mach
+
+	if use system-python-libs; then
+		export MACH_BUILD_PYTHON_NATIVE_PACKAGE_SOURCE="system"
+	else
+		export MACH_BUILD_PYTHON_NATIVE_PACKAGE_SOURCE="none"
+	fi
+
+	# Disable notification when build system has finished
+	export MOZ_NOSPAM=1
+
+	# Portage sets XARGS environment variable to "xargs -r" by default which
+	# breaks build system's check_prog() function which doesn't support arguments
+	mozconfig_add_options_ac 'Gentoo default' "XARGS=${EPREFIX}/usr/bin/xargs"
+
+	# Set build dir
+	mozconfig_add_options_mk 'Gentoo default' "MOZ_OBJDIR=${BUILD_DIR}"
+
+	# Show flags we will use
+	einfo "Build BINDGEN_CFLAGS:\t${BINDGEN_CFLAGS:-no value set}"
+	einfo "Build CFLAGS:\t\t${CFLAGS:-no value set}"
+	einfo "Build CXXFLAGS:\t\t${CXXFLAGS:-no value set}"
+	einfo "Build LDFLAGS:\t\t${LDFLAGS:-no value set}"
+	einfo "Build RUSTFLAGS:\t\t${RUSTFLAGS:-no value set}"
+
+	# Handle EXTRA_CONF and show summary
+	local ac opt hash reason
+
+	# Apply EXTRA_ECONF entries to $MOZCONFIG
+	if [[ -n ${EXTRA_ECONF} ]] ; then
+		IFS=\! read -a ac <<<${EXTRA_ECONF// --/\!}
+		for opt in "${ac[@]}"; do
+			mozconfig_add_options_ac "EXTRA_ECONF" --${opt#--}
+		done
+	fi
+
+	echo
+	echo "=========================================================="
+	echo "Building ${PF} with the following configuration"
+	grep ^ac_add_options "${MOZCONFIG}" | while read ac opt hash reason; do
+		[[ -z ${hash} || ${hash} == \# ]] \
+			|| die "error reading mozconfig: ${ac} ${opt} ${hash} ${reason}"
+		printf "    %-30s  %s\n" "${opt}" "${reason:-mozilla.org default}"
+	done
+	echo "=========================================================="
+	echo
+
+	./mach configure || die
+}
+
+src_compile() {
+	local virtx_cmd=
+
+	if tc-ld-is-mold && use lto; then
+		# increase ulimit with mold+lto, bugs #892641, #907485
+		if ! ulimit -n 16384 1>/dev/null 2>&1 ; then
+			ewarn "Unable to modify ulimits - building with mold+lto might fail due to low ulimit -n resources."
+			ewarn "Please see bugs #892641 & #907485."
+		else
+			ulimit -n 16384
+		fi
+	fi
+
+	if use pgo; then
+		# Reset and cleanup environment variables used by GNOME/XDG
+		gnome2_environment_reset
+
+		addpredict /root
+
+		if ! use X; then
+			virtx_cmd=virtwl
+		else
+			virtx_cmd=virtx
+		fi
+	fi
+
+	if ! use X; then
+		local -x GDK_BACKEND=wayland
+	else
+		local -x GDK_BACKEND=x11
+	fi
+
+	${virtx_cmd} ./mach build --verbose || die
+
+	# Build language packs
+	moz_build_xpi
+}
+
+src_install() {
+	# xpcshell is getting called during install
+	pax-mark m \
+		"${BUILD_DIR}"/dist/bin/xpcshell \
+		"${BUILD_DIR}"/dist/bin/${PN} \
+		"${BUILD_DIR}"/dist/bin/plugin-container
+
+	DESTDIR="${D}" ./mach install || die
+
+	# Upstream cannot ship symlink but we can (bmo#658850)
+	rm "${ED}${MOZILLA_FIVE_HOME}/${PN}-bin" || die
+	dosym ${PN} ${MOZILLA_FIVE_HOME}/${PN}-bin
+
+	# Don't install llvm-symbolizer from sys-devel/llvm package
+	if [[ -f "${ED}${MOZILLA_FIVE_HOME}/llvm-symbolizer" ]] ; then
+		rm -v "${ED}${MOZILLA_FIVE_HOME}/llvm-symbolizer" || die
+	fi
+
+	# Install policy (currently only used to disable application updates)
+	insinto "${MOZILLA_FIVE_HOME}/distribution"
+	newins "${FILESDIR}"/distribution.ini distribution.ini
+	newins "${FILESDIR}"/disable-auto-update.policy.json policies.json
+
+	# Install system-wide preferences
+	local PREFS_DIR="${MOZILLA_FIVE_HOME}/browser/defaults/preferences"
+	insinto "${PREFS_DIR}"
+	newins "${FILESDIR}"/gentoo-default-prefs.js gentoo-prefs.js
+
+	local GENTOO_PREFS="${ED}${PREFS_DIR}/gentoo-prefs.js"
+
+	# Set dictionary path to use system hunspell
+	cat >>"${GENTOO_PREFS}" <<-EOF || die "failed to set spellchecker.dictionary_path pref"
+	pref("spellchecker.dictionary_path",       "${EPREFIX}/usr/share/myspell");
+	EOF
+
+	# Set installDistroAddons to true so that language packs work
+	cat >>"${GENTOO_PREFS}" <<-EOF || die "failed to set extensions.installDistroAddons pref"
+	pref("extensions.installDistroAddons",     true);
+	pref("extensions.langpacks.signatures.required",     false);
+	EOF
+
+	# Disable signatures for language packs so that unsigned just built language packs work
+	cat >>"${GENTOO_PREFS}" <<-EOF || die "failed to disable langpacks signatures"
+	pref("extensions.langpacks.signatures.required",       false);
+	EOF
+
+	# Force hwaccel prefs if USE=hwaccel is enabled
+	if use hwaccel ; then
+		cat "${FILESDIR}"/gentoo-hwaccel-prefs.js-r2 \
+		>>"${GENTOO_PREFS}" \
+		|| die "failed to add prefs to force hardware-accelerated rendering to all-gentoo.js"
+
+		if use wayland; then
+			cat >>"${GENTOO_PREFS}" <<-EOF || die "failed to set hwaccel wayland prefs"
+			pref("gfx.x11-egl.force-enabled",          false);
+			EOF
+		else
+			cat >>"${GENTOO_PREFS}" <<-EOF || die "failed to set hwaccel x11 prefs"
+			pref("gfx.x11-egl.force-enabled",          true);
+			EOF
+		fi
+	fi
+
+	# Force the graphite pref if USE=system-harfbuzz is enabled, since the pref cannot disable it
+	if use system-harfbuzz ; then
+		cat >>"${GENTOO_PREFS}" <<-EOF || die "failed to set gfx.font_rendering.graphite.enabled pref"
+		sticky_pref("gfx.font_rendering.graphite.enabled", true);
+		EOF
+	fi
+
+	# Install language packs
+	local langpacks=( $(find "${BUILD_DIR}"/dist/linux-x86_64/xpi -type f -name '*.xpi') )
+	if [[ -n "${langpacks}" ]] ; then
+		moz_install_xpi "${MOZILLA_FIVE_HOME}/distribution/extensions" "${langpacks[@]}"
+	fi
+
+	# Install geckodriver
+	if use geckodriver ; then
+		einfo "Installing geckodriver into ${ED}${MOZILLA_FIVE_HOME} ..."
+		pax-mark m "${BUILD_DIR}"/dist/bin/geckodriver
+		exeinto "${MOZILLA_FIVE_HOME}"
+		doexe "${BUILD_DIR}"/dist/bin/geckodriver
+
+		dosym ${MOZILLA_FIVE_HOME}/geckodriver /usr/bin/geckodriver
+	fi
+
+	# Install icons
+	local icon_srcdir="${S}/browser/branding/official"
+	local icon_symbolic_file="${FILESDIR}/icon/icecat-symbolic.svg"
+
+	insinto /usr/share/icons/hicolor/symbolic/apps
+	newins "${icon_symbolic_file}" ${PN}-symbolic.svg
+
+	local icon size
+	for icon in "${icon_srcdir}"/default*.png ; do
+		size=${icon%.png}
+		size=${size##*/default}
+
+		if [[ ${size} -eq 48 ]] ; then
+			newicon "${icon}" ${PN}.png
+		fi
+
+		newicon -s ${size} "${icon}" ${PN}.png
+	done
+
+	# Install menu
+	local app_name="GNU IceCat"
+	local desktop_file="${FILESDIR}/icon/${PN}-r3.desktop"
+	local desktop_filename="${PN}-esr.desktop"
+	local exec_command="${PN}"
+	local icon="${PN}"
+	local use_wayland="false"
+
+	if use wayland ; then
+		use_wayland="true"
+	fi
+
+	cp "${desktop_file}" "${WORKDIR}/${PN}.desktop-template" || die
+
+	sed -i \
+		-e "s:@NAME@:${app_name}:" \
+		-e "s:@EXEC@:${exec_command}:" \
+		-e "s:@ICON@:${icon}:" \
+		"${WORKDIR}/${PN}.desktop-template" \
+		|| die
+
+	newmenu "${WORKDIR}/${PN}.desktop-template" "${desktop_filename}"
+
+	rm "${WORKDIR}/${PN}.desktop-template" || die
+
+	# Install wrapper script
+	[[ -f "${ED}/usr/bin/${PN}" ]] && rm "${ED}/usr/bin/${PN}"
+	newbin "${FILESDIR}/${PN}-r1.sh" ${PN}
+
+	# Update wrapper
+	sed -i \
+		-e "s:@PREFIX@:${EPREFIX}/usr:" \
+		-e "s:@DEFAULT_WAYLAND@:${use_wayland}:" \
+		"${ED}/usr/bin/${PN}" \
+		|| die
+
+	readme.gentoo_create_doc
+}
+
+pkg_preinst() {
+	xdg_pkg_preinst
+
+	# If the apulse libs are available in MOZILLA_FIVE_HOME then apulse
+	# does not need to be forced into the LD_LIBRARY_PATH
+	if use pulseaudio && has_version ">=media-sound/apulse-0.1.12-r4" ; then
+		einfo "APULSE found; Generating library symlinks for sound support ..."
+		local lib
+		pushd "${ED}${MOZILLA_FIVE_HOME}" &>/dev/null || die
+		for lib in ../apulse/libpulse{.so{,.0},-simple.so{,.0}} ; do
+			# A quickpkg rolled by hand will grab symlinks as part of the package,
+			# so we need to avoid creating them if they already exist.
+			if [[ ! -L ${lib##*/} ]] ; then
+				ln -s "${lib}" ${lib##*/} || die
+			fi
+		done
+		popd &>/dev/null || die
+	fi
+}
+
+pkg_postinst() {
+	xdg_pkg_postinst
+
+	elog "Cloudflare browser checks are broken with GNU IceCats anti fingerprinting measures."
+	elog "You can fix cloudflare browser checks by undoing them in about:config like below:"
+	# Specifying (X11) is necessary for it to work, even in a Wayland session
+	elog "   general.appversion.override: ${PV%.[0-9]*} (X11)"
+	elog "   general.oscpu.override: Linux x86_64"
+	elog "   general.platform.override: Linux x86_64"
+
+	if use pulseaudio && has_version ">=media-sound/apulse-0.1.12-r4" ; then
+		elog "Apulse was detected at merge time on this system and so it will always be"
+		elog "used for sound.  If you wish to use pulseaudio instead please unmerge"
+		elog "media-sound/apulse."
+		elog
+	fi
+
+	# bug 835078
+	if use hwaccel && has_version "x11-drivers/xf86-video-nouveau"; then
+		ewarn "You have nouveau drivers installed in your system and 'hwaccel' "
+		ewarn "enabled for Firefox. Nouveau / your GPU might not support the "
+		ewarn "required EGL, so either disable 'hwaccel' or try the workaround "
+		ewarn "explained in https://bugs.gentoo.org/835078#c5 if Firefox crashes."
+	fi
+
+	readme.gentoo_print_elog
+
+	optfeature_header "Optional programs for extra features:"
+	optfeature "desktop notifications" x11-libs/libnotify
+	optfeature "fallback mouse cursor theme e.g. on WMs" gnome-base/gsettings-desktop-schemas
+
+	if use hwaccel && has_version "x11-drivers/nvidia-drivers"; then
+		optfeature "hardware acceleration with NVIDIA cards" media-libs/nvidia-vaapi-driver
+	fi
+
+	if ! has_version "sys-libs/glibc"; then
+		elog
+		elog "glibc not found! You won't be able to play DRM content."
+		elog "See Gentoo bug #910309 or upstream bug #1843683."
+		elog
+	fi
+}