diff --git a/srcpkgs/firefox/template b/srcpkgs/firefox/template
index 2ccac1dabbe..da04ad2de51 100644
--- a/srcpkgs/firefox/template
+++ b/srcpkgs/firefox/template
@@ -3,7 +3,7 @@
 # THIS PKG MUST BE SYNCHRONIZED WITH "srcpkgs/firefox-i18n".
 #
 pkgname=firefox
-version=132.0
+version=133.0
 revision=1
 build_helper="rust"
 short_desc="Mozilla Firefox web browser"
@@ -11,12 +11,12 @@ maintainer="Duncaen <duncaen@voidlinux.org>"
 license="MPL-2.0, GPL-2.0-or-later, LGPL-2.1-or-later"
 homepage="https://www.mozilla.org/firefox/"
 distfiles="${MOZILLA_SITE}/firefox/releases/${version/beta/b}/source/firefox-${version/beta/b}.source.tar.xz"
-checksum=8908b144895b354460c6975291b75ea804b07bf9bb0ee386eafeaf3c82c55c7e
+checksum=492b2c9a3b6d215e38ce490624e8b2b9473419accdeaddb24ba00bc6adc3cc60
 
 lib32disabled=yes
-
+_llvmver=19
 hostmakedepends="autoconf213 unzip zip pkg-config perl python3 yasm rust
- cargo llvm18 clang18 lld18 nodejs cbindgen nasm which tar"
+ cargo llvm${_llvmver} clang${_llvmver} lld${_llvmver} nodejs cbindgen nasm which tar"
 makedepends="nss-devel libjpeg-turbo-devel gtk+3-devel icu-devel
  pixman-devel libevent-devel libnotify-devel libvpx-devel libwebp-devel
  libXrender-devel libXcomposite-devel libSM-devel libXt-devel rust-std
@@ -78,6 +78,8 @@ do_build() {
 			exec clang \
 				--target="${XBPS_CROSS_TRIPLET}" \
 				--sysroot="${XBPS_CROSS_BASE}" \
+				--gcc-toolchain=/usr \
+				-isystem "${XBPS_CROSS_BASE}/usr/include" \
 				"\$@"
 			!
 
@@ -86,6 +88,11 @@ do_build() {
 			exec clang++ \
 				--target="${XBPS_CROSS_TRIPLET}" \
 				--sysroot="${XBPS_CROSS_BASE}" \
+				--gcc-toolchain=/usr \
+				-isystem "${XBPS_CROSS_BASE}/usr/include/c++/${gcc_version%.*}" \
+				-isystem "${XBPS_CROSS_BASE}/usr/include/c++/${gcc_version%.*}/${XBPS_CROSS_TRIPLET}" \
+				-isystem "${XBPS_CROSS_BASE}/usr/include/c++/${gcc_version%.*}/backward" \
+				-isystem "${XBPS_CROSS_BASE}/usr/include" \
 				"\$@"
 			!