diff --git a/arch/chromium-fourier/PKGBUILD b/arch/chromium-fourier/PKGBUILD
index ebe4af22e..bbde315a8 100644
--- a/arch/chromium-fourier/PKGBUILD
+++ b/arch/chromium-fourier/PKGBUILD
@@ -8,13 +8,13 @@
 # NEXT.md alongside this PKGBUILD for the full rationale and the
 # validation log on PineTab2 (RK3566).
 #
-# Multi-arch: builds natively on x86_64 and aarch64. The x86_64 path
-# is primarily a development / CI host; the runtime target audience is
-# aarch64. The two patches are architecture-independent.
+# Cross-compiled from x86_64 using chromium's bundled clang (upstream
+# LLVM doesn't ship clang 23+ yet; chromium's internal fork is required).
+# Runtime target is aarch64. The three patches are architecture-independent.
 
 pkgname=chromium-fourier
-pkgver=147.0.7727.116
-pkgrel=2
+pkgver=148.0.7778.178
+pkgrel=1
 epoch=1
 pkgdesc='Chromium with V4L2VDA HW video decode unlocked for mainline Linux Wayland on Rockchip'
 arch=('aarch64' 'x86_64')
@@ -150,7 +150,6 @@ build() {
     'symbol_level=0'
     'is_cfi=false'
     'treat_warnings_as_errors=false'
-    'enable_nacl=false'
     'enable_widevine=false'
 
     # System toolchain (clang/lld from pacman)
diff --git a/arch/chromium-fourier/patches/nv12-external-oes-on-modifier-external-only.patch b/arch/chromium-fourier/patches/nv12-external-oes-on-modifier-external-only.patch
index 4b9614571..758b3a7f0 100644
--- a/arch/chromium-fourier/patches/nv12-external-oes-on-modifier-external-only.patch
+++ b/arch/chromium-fourier/patches/nv12-external-oes-on-modifier-external-only.patch
@@ -73,16 +73,15 @@ diff --git a/ui/ozone/common/native_pixmap_egl_binding.cc b/ui/ozone/common/nati
 index 31877f4459..6855c1093e 100644
 --- a/ui/ozone/common/native_pixmap_egl_binding.cc
 +++ b/ui/ozone/common/native_pixmap_egl_binding.cc
-@@ -6,10 +6,13 @@
- 
+@@ -6,9 +6,12 @@
+
  #include <array>
- 
+
 +#include "base/containers/flat_map.h"
  #include "base/logging.h"
  #include "base/memory/scoped_refptr.h"
 +#include "base/no_destructor.h"
  #include "base/notreached.h"
- #include "base/numerics/safe_conversions.h"
 +#include "base/synchronization/lock.h"
  #include "ui/gfx/linux/drm_util_linux.h"
  #include "ui/gl/gl_bindings.h"
diff --git a/debian/chromium-fourier/build-deb.sh b/debian/chromium-fourier/build-deb.sh
new file mode 100755
index 000000000..e7438a06d
--- /dev/null
+++ b/debian/chromium-fourier/build-deb.sh
@@ -0,0 +1,150 @@
+#!/bin/bash
+# Package pre-built chromium-fourier artifacts into a .deb.
+#
+# Chromium can't be compiled natively on any available aarch64 runner
+# (clang version wall — chromium requires its internal clang fork).
+# The build is cross-compiled on CT 220 (data, x86_64 Ryzen 7).
+# This script expects the build artifacts to exist at BUILD_DIR
+# (default: fetched from CT 220 via SSH).
+#
+# Sibling Arch package: ../../arch/chromium-fourier/PKGBUILD
+set -euo pipefail
+
+PKGVER=148.0.7778.178
+EPOCH=1
+PKGREL=1
+ARCH=arm64
+
+HERE=$(dirname "$(readlink -f "$0")")
+export SOURCE_DATE_EPOCH=1779854400  # 2026-05-24 09:00 UTC
+
+BUILD_DIR="${BUILD_DIR:-}"
+
+work=$(mktemp -d)
+trap "rm -rf $work" EXIT
+
+if [ -z "$BUILD_DIR" ]; then
+    echo "BUILD_DIR not set — fetching artifacts from CT 220 on data..."
+    BUILD_DIR="$work/artifacts"
+    mkdir -p "$BUILD_DIR"
+    ssh root@data "pct exec 220 -- tar -cf - -C /build/chromium/src/out/Default \
+        chrome chrome_crashpad_handler \
+        libEGL.so libGLESv2.so libvk_swiftshader.so libvulkan.so.1 \
+        vk_swiftshader_icd.json \
+        chrome_100_percent.pak chrome_200_percent.pak resources.pak \
+        v8_context_snapshot.bin snapshot_blob.bin icudtl.dat \
+        locales/" | tar -xf - -C "$BUILD_DIR"
+fi
+
+ROOT="$work/pkgroot"
+
+install -Dm755 "$BUILD_DIR/chrome"                   "$ROOT/usr/lib/chromium/chromium"
+install -Dm755 "$BUILD_DIR/chrome_crashpad_handler"  "$ROOT/usr/lib/chromium/chrome_crashpad_handler"
+
+for so in libEGL.so libGLESv2.so libvk_swiftshader.so libvulkan.so.1; do
+    [ -f "$BUILD_DIR/$so" ] && install -Dm755 "$BUILD_DIR/$so" "$ROOT/usr/lib/chromium/$so"
+done
+
+for icd in "$BUILD_DIR"/*_icd.json; do
+    [ -f "$icd" ] && install -Dm644 "$icd" "$ROOT/usr/lib/chromium/$(basename "$icd")"
+done
+
+for f in chrome_100_percent.pak chrome_200_percent.pak resources.pak \
+         v8_context_snapshot.bin snapshot_blob.bin icudtl.dat; do
+    [ -f "$BUILD_DIR/$f" ] && install -Dm644 "$BUILD_DIR/$f" "$ROOT/usr/lib/chromium/$f"
+done
+
+if [ -d "$BUILD_DIR/locales" ]; then
+    install -dm755 "$ROOT/usr/lib/chromium/locales"
+    cp -r "$BUILD_DIR/locales/"* "$ROOT/usr/lib/chromium/locales/"
+fi
+
+install -dm755 "$ROOT/usr/bin"
+cat > "$ROOT/usr/bin/chromium-fourier" <<'LAUNCHER'
+#!/bin/bash
+USER_HANDLES_VULKAN=0
+for arg in "$@"; do
+  case "$arg" in
+    --use-vulkan*|--enable-features=*Vulkan*|--disable-features=*Vulkan*|--use-angle=vulkan*)
+      USER_HANDLES_VULKAN=1
+      break
+      ;;
+  esac
+done
+
+vulkan_default=()
+if [ "$USER_HANDLES_VULKAN" = 0 ]; then
+  vulkan_default=(--disable-features=Vulkan)
+fi
+
+exec /usr/lib/chromium/chromium \
+  --ozone-platform=wayland \
+  --use-gl=angle --use-angle=gles \
+  --enable-features=AcceleratedVideoDecoder \
+  "${vulkan_default[@]}" \
+  "$@"
+LAUNCHER
+chmod 0755 "$ROOT/usr/bin/chromium-fourier"
+
+mkdir -p "$ROOT/usr/share/doc/chromium-fourier" "$ROOT/DEBIAN"
+install -Dm644 "$HERE/debian/copyright" \
+    "$ROOT/usr/share/doc/chromium-fourier/copyright"
+install -Dm644 "$HERE/debian/changelog" \
+    "$ROOT/usr/share/doc/chromium-fourier/changelog.Debian"
+gzip -9 -n "$ROOT/usr/share/doc/chromium-fourier/changelog.Debian"
+
+ISIZE=$(du -sk "$ROOT" | awk '{print $1}')
+cat > "$ROOT/DEBIAN/control" <<EOF
+Package: chromium-fourier
+Version: ${EPOCH}:${PKGVER}-${PKGREL}
+Section: web
+Priority: optional
+Architecture: ${ARCH}
+Installed-Size: ${ISIZE}
+Depends: libasound2,
+         libatk-bridge2.0-0,
+         libatk1.0-0,
+         libcairo2,
+         libcups2,
+         libdbus-1-3,
+         libdrm2,
+         libexpat1,
+         libfontconfig1,
+         libfreetype6,
+         libgbm1,
+         libglib2.0-0,
+         libgtk-3-0,
+         libnspr4,
+         libnss3,
+         libpango-1.0-0,
+         libpulse0,
+         libva2,
+         libwayland-client0,
+         libx11-6,
+         libxcb1,
+         libxkbcommon0,
+         libpipewire-0.3-0,
+         fonts-liberation,
+         v4l-utils
+Provides: www-browser
+Conflicts: chromium
+Maintainer: Markus Fritsche <mfritsche@reauktion.de>
+Homepage: https://www.chromium.org/
+Description: Chromium with V4L2 HW video decode for Rockchip (Wayland + mainline)
+ Chromium ${PKGVER} with three patches enabling V4L2 hardware video
+ decoding on mainline Linux / Wayland for Rockchip SoCs (RK3566 hantro,
+ RK3588 VDPU381).
+ .
+ Cross-compiled from x86_64 using chromium's bundled clang (upstream
+ LLVM cannot compile chromium). Runtime target is aarch64.
+ .
+ Patches: enable-v4l2-decoder-default, wayland-allow-direct-egl-gles2,
+ nv12-external-oes-on-modifier-external-only.
+ .
+ Launcher at /usr/bin/chromium-fourier defaults to Wayland + ANGLE/GLES
+ with Vulkan disabled (panvk on RK3566 breaks V4L2 dispatch).
+EOF
+
+DEB_OUT="chromium-fourier_${EPOCH}%3a${PKGVER}-${PKGREL}_${ARCH}.deb"
+dpkg-deb --root-owner-group --build "$ROOT" "$HERE/$DEB_OUT"
+echo "built: $HERE/$DEB_OUT"
diff --git a/debian/chromium-fourier/debian/changelog b/debian/chromium-fourier/debian/changelog
new file mode 100644
index 000000000..6ae7568c5
--- /dev/null
+++ b/debian/chromium-fourier/debian/changelog
@@ -0,0 +1,8 @@
+chromium-fourier (1:148.0.7778.178-1) trixie; urgency=medium
+
+  * Chromium 148.0.7778.178 with V4L2 HW decode patches for Rockchip.
+  * Cross-compiled from x86_64 using chromium's bundled clang.
+  * Three fourier patches: enable-v4l2-decoder-default,
+    wayland-allow-direct-egl-gles2, nv12-external-oes-on-modifier-external-only.
+
+ -- Markus Fritsche <mfritsche@reauktion.de>  Sat, 24 May 2026 09:00:00 +0200
diff --git a/debian/chromium-fourier/debian/copyright b/debian/chromium-fourier/debian/copyright
new file mode 100644
index 000000000..39646f94e
--- /dev/null
+++ b/debian/chromium-fourier/debian/copyright
@@ -0,0 +1,32 @@
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: Chromium
+Upstream-Contact: chromium-dev@chromium.org
+Source: https://www.chromium.org/
+
+Files: *
+Copyright: The Chromium Authors
+License: BSD-3-Clause
+
+Files: debian/*
+Copyright: 2026 Markus Fritsche <mfritsche@reauktion.de>
+License: BSD-3-Clause
+
+License: BSD-3-Clause
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+ .
+ 1. Redistributions of source code must retain the above copyright notice,
+    this list of conditions and the following disclaimer.
+ .
+ 2. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+ .
+ 3. Neither the name of the copyright holder nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+ .
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED.