diff --git a/www-client/vivaldi/Manifest b/www-client/vivaldi/Manifest
index 40a4351d3e8a1..6ee36ba452a13 100644
--- a/www-client/vivaldi/Manifest
+++ b/www-client/vivaldi/Manifest
@@ -4,3 +4,6 @@ DIST vivaldi-stable_7.5.3735.62-1_armhf.deb 116461176 BLAKE2B 0760ee2e4411b30377
 DIST vivaldi-stable_7.5.3735.64-1_amd64.deb 125170388 BLAKE2B 681bf1583ccb16abd951a6f816da47575fc0be90c13ca7fb42ccad44db811863dca7f160428bd317f13d2e38f3a2365c8bcd6b70ce1a08e2c5f8d660206c69b8 SHA512 77fa91768bfff9703705f330bb48b353d81dd12911467bf98f30596eac1e80b6e7399e19b71dad6d1a108e77a663e81a9f9df4948c7a5ad889b3a30a175ffaa9
 DIST vivaldi-stable_7.5.3735.64-1_arm64.deb 115834632 BLAKE2B 6d69782d958ccade135c9ac2fd5147ba61b87df9d59a2450fb6b0d4f4c0376fe9502f88fe12b3550aa448319c6200775d4a951c1b5d759b0ac5dd8afb3f7e0d1 SHA512 926ddecd213aca5f9aedf44bc10d60084092cf6897ce10ee5df1d7ecf44f49dd550a740916520e877c2015b2c338658efb3ed265a13582bc11dbcbe6501391ae
 DIST vivaldi-stable_7.5.3735.64-1_armhf.deb 116425852 BLAKE2B 8af51e87dd4b3af7b8ea01f77434f47cf37d1d8823450207beced3fddd8153495a52800fb2266db94680da095acf94f77fffb28a72470d6e75ccf65abb6b876e SHA512 7a165430462184abd0bbd7b2f02d4a3cdcef6672dad62e368434926bae2bfbdc5d03deff972dc3175dba9b235a2ef94aa6e2e3808edadc536b4fffd537e35311
+DIST vivaldi-stable_7.5.3735.66-1_amd64.deb 125215140 BLAKE2B 13a08dd5b46f74c5c45567ce3c4d8876e72adbaf5e1cea6b89bd58012c290ee9d262b61745f599ebd2cd6cce25fcdd8b14c273aab2d8d923c80c3419a172fe18 SHA512 4ab1799c8435d6203fc15108de822f3c03ec206806a78e8fa1d560d9a2e4188d73f1b145d8c6cf5607029d96f0636ad1c0eea8e798a77d85af21ff7419f45a9b
+DIST vivaldi-stable_7.5.3735.66-1_arm64.deb 115847388 BLAKE2B 39d64897941164d4f99af452f0c4f346e3757fabed7aaee7d8c1de89e911c9ce41f746273c37abf9479c0b978153a524219a66df344aef5b57f80bc3318f02e2 SHA512 d143e7f2638041a4bacce8b0b767977c6e13da61ef14d8bce71af192422167968d598a0f5ec65da1f625eee8035ad7b97d421b43868fe06a876c819bee7efbfc
+DIST vivaldi-stable_7.5.3735.66-1_armhf.deb 116441136 BLAKE2B ed917f8af4707713b64717a46c4d79adce364c122db5bd8776dba5f23d06e0c400a584b9ff44793928b39f94c3b7a11963dc61736f2e79345ca2c21c983117d0 SHA512 373990cb86320db0fab7b952bfc6b7149a3d47beca0cbe2b4a844538d00ce3f3b5088e2a2dd2940b51867ccd75a31cc12e14668bbb386c30dd6adacebfbfcac9
diff --git a/www-client/vivaldi/vivaldi-7.5.3735.66.ebuild b/www-client/vivaldi/vivaldi-7.5.3735.66.ebuild
new file mode 100644
index 0000000000000..7851859811983
--- /dev/null
+++ b/www-client/vivaldi/vivaldi-7.5.3735.66.ebuild
@@ -0,0 +1,218 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+CHROMIUM_VERSION="138"
+CHROMIUM_LANGS="
+	af
+	am
+	ar
+	az
+	be
+	bg
+	bn
+	ca
+	ca-valencia
+	cs
+	da
+	de
+	de-CH
+	el
+	en-GB
+	en-US
+	eo
+	es
+	es-419
+	es-PE
+	et
+	eu
+	fa
+	fi
+	fil
+	fr
+	fy
+	gd
+	gl
+	gu
+	he
+	hi
+	hr
+	hu
+	hy
+	id
+	io
+	is
+	it
+	ja
+	jbo
+	ka
+	kab
+	kn
+	ko
+	lt
+	lv
+	mk
+	ml
+	mr
+	ms
+	nb
+	nl
+	nn
+	pa
+	pl
+	pt-BR
+	pt-PT
+	ro
+	ru
+	sc
+	sk
+	sl
+	sq
+	sr
+	sr-Latn
+	sv
+	sw
+	ta
+	te
+	th
+	tr
+	uk
+	ur
+	vi
+	zh-CN
+	zh-TW
+"
+
+inherit chromium-2 desktop linux-info toolchain-funcs unpacker xdg
+
+VIVALDI_PN="${PN/%vivaldi/vivaldi-stable}"
+VIVALDI_HOME="opt/${PN}"
+DESCRIPTION="A browser for our friends"
+HOMEPAGE="https://vivaldi.com/"
+
+if [[ ${PV} = *_p* ]]; then
+	DEB_REV="${PV#*_p}"
+else
+	DEB_REV=1
+fi
+
+VIVALDI_BASE_URI="https://downloads.vivaldi.com/${VIVALDI_PN#vivaldi-}/${VIVALDI_PN}_${PV%_p*}-${DEB_REV}_"
+
+SRC_URI="
+	amd64? ( ${VIVALDI_BASE_URI}amd64.deb )
+	arm? ( ${VIVALDI_BASE_URI}armhf.deb )
+	arm64? ( ${VIVALDI_BASE_URI}arm64.deb )
+"
+
+S="${WORKDIR}"
+LICENSE="Vivaldi"
+SLOT="0"
+KEYWORDS="-* ~amd64 ~arm ~arm64"
+IUSE="ffmpeg-chromium gtk proprietary-codecs qt6 widevine"
+RESTRICT="bindist mirror"
+#REQUIRED_USE="ffmpeg-chromium? ( proprietary-codecs )"
+
+RDEPEND="
+	>=app-accessibility/at-spi2-core-2.46.0:2
+	dev-libs/expat
+	dev-libs/glib:2
+	dev-libs/nspr
+	dev-libs/nss
+	media-libs/alsa-lib
+	media-libs/mesa[gbm(+)]
+	net-print/cups
+	sys-apps/dbus
+	x11-libs/cairo
+	x11-libs/libdrm
+	x11-libs/libX11
+	x11-libs/libxcb
+	x11-libs/libXcomposite
+	x11-libs/libXdamage
+	x11-libs/libXext
+	x11-libs/libXfixes
+	x11-libs/libxkbcommon
+	x11-libs/libXrandr
+	x11-libs/pango
+	gtk? ( gui-libs/gtk:4 x11-libs/gtk+:3 )
+	proprietary-codecs? (
+		!ffmpeg-chromium? ( >=media-video/ffmpeg-6.1-r1:0/58.60.60[chromium] )
+		ffmpeg-chromium? ( media-video/ffmpeg-chromium:${CHROMIUM_VERSION} )
+	)
+	qt6? ( dev-qt/qtbase:6[gui,widgets] )
+	widevine? ( www-plugins/chrome-binary-plugins )
+"
+
+QA_PREBUILT="*"
+CONFIG_CHECK="~CPU_FREQ"
+
+src_unpack() {
+	unpack_deb ${A}
+}
+
+src_prepare() {
+	# Rename docs directory to our needs.
+	mv usr/share/doc/{${VIVALDI_PN},${PF}}/ || die
+
+	# Decompress the docs.
+	gunzip usr/share/doc/${PF}/changelog.gz || die
+
+	# The appdata directory is deprecated.
+	mv usr/share/{appdata,metainfo}/ || die
+
+	# Remove cron job for updating from Debian repos.
+	rm etc/cron.daily/${PN} ${VIVALDI_HOME}/cron/${PN} || die
+	rmdir etc/{cron.daily/,} ${VIVALDI_HOME}/cron/ || die
+
+	# Remove scripts that will most likely break things.
+	rm -vf ${VIVALDI_HOME}/update-ffmpeg || die
+
+	pushd ${VIVALDI_HOME}/locales > /dev/null || die
+	rm ja-KS.pak || die # No flag for Kansai as not in IETF list.
+	rm kmr.pak || die # No flag for Kurmanji.
+	chromium_remove_language_paks
+	popd > /dev/null || die
+
+	if use proprietary-codecs; then
+		einfo Bundled $($(tc-getSTRINGS) ${VIVALDI_HOME}/lib/libffmpeg.so | grep -m1 "^FFmpeg version ")
+		rm ${VIVALDI_HOME}/lib/libffmpeg.so || die
+		rmdir ${VIVALDI_HOME}/lib || die
+	fi
+
+	# Qt5 is obsolete now.
+	rm ${VIVALDI_HOME}/libqt5_shim.so || die
+
+	if ! use qt6; then
+		rm ${VIVALDI_HOME}/libqt6_shim.so || die
+	fi
+
+	eapply_user
+}
+
+src_install() {
+	mv */ "${D}" || die
+	dosym ../../${VIVALDI_HOME}/${PN} /usr/bin/${VIVALDI_PN}
+	fperms 4711 /${VIVALDI_HOME}/vivaldi-sandbox
+
+	local logo size
+	for logo in "${ED}"/${VIVALDI_HOME}/product_logo_*.png; do
+		size=${logo##*_}
+		size=${size%.*}
+		newicon -s "${size}" "${logo}" ${PN}.png
+	done
+
+	if use proprietary-codecs; then
+		dosym ../../usr/$(get_libdir)/chromium/libffmpeg.so$(usex ffmpeg-chromium .${CHROMIUM_VERSION} "") \
+			  /${VIVALDI_HOME}/libffmpeg.so.$(ver_cut 1-2)
+	fi
+
+	if use widevine; then
+		dosym ../../usr/$(get_libdir)/chromium-browser/WidevineCdm \
+			  /${VIVALDI_HOME}/WidevineCdm
+	fi
+
+	case ${PN} in
+		vivaldi) dosym ${VIVALDI_PN} /usr/bin/${PN} ;;
+		vivaldi-snapshot) dosym ${PN} /${VIVALDI_HOME}/vivaldi ;;
+	esac
+}