diff --git a/www/waterfox/Makefile b/www/waterfox/Makefile
index 143c85cfbffe..ae3c2ae7b48e 100644
--- a/www/waterfox/Makefile
+++ b/www/waterfox/Makefile
@@ -1,95 +1,95 @@
 PORTNAME=	waterfox
-DISTVERSION=	6.6.2
+DISTVERSION=	6.6.3
 PORTEPOCH=	1
 CATEGORIES=	www
 
 MAINTAINER=	freebsd@sysctl.cz
 COMMENT=	Distilled fork of Firefox
 WWW=		https://www.waterfox.net/
 
 LICENSE=	MPL20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	nspr>=4.32:devel/nspr \
 		nss>=3.112:security/nss \
 		icu>=76.1:devel/icu \
 		libevent>=2.1.8:devel/libevent \
 		harfbuzz>=10.1.0:print/harfbuzz \
 		graphite2>=1.3.14:graphics/graphite2 \
 		png>=1.6.45:graphics/png \
 		dav1d>=1.0.0:multimedia/dav1d \
 		libvpx>=1.15.0:multimedia/libvpx \
 		${PYTHON_PKGNAMEPREFIX}sqlite3>0:databases/py-sqlite3@${PY_FLAVOR} \
 		v4l_compat>0:multimedia/v4l_compat \
 		nasm:devel/nasm \
 		yasm:devel/yasm \
 		zip:archivers/zip \
 		${LOCALBASE}/share/wasi-sysroot/lib/wasm32-wasi/libc++abi.a:devel/wasi-libcxx${LLVM_VERSION} \
 		${LOCALBASE}/share/wasi-sysroot/lib/wasm32-wasi/libc.a:devel/wasi-libc@${LLVM_VERSION} \
 		wasi-compiler-rt${LLVM_VERSION}>0:devel/wasi-compiler-rt${LLVM_VERSION}
 
 USE_GECKO=	gecko
 USE_GITHUB=	yes
 GH_ACCOUNT=	BrowserWorks
 GH_TUPLE=	BrowserWorks:l10n:394dfec:l10n/waterfox/browser/locales
 USE_MOZILLA=	-sqlite
 # work around bindgen not finding ICU, e.g.
 # dist/include/mozilla/intl/ICU4CGlue.h:8:10: fatal error: 'unicode/uenum.h' file not found, err: true
 CONFIGURE_ENV+=	BINDGEN_CFLAGS="-I${LOCALBASE}/include"
 CONFIGURE_ENV+=	MOZ_REQUIRE_SIGNING=""
 
 FIREFOX_ICON=		${MOZILLA}.png
 FIREFOX_ICON_SRC=	${PREFIX}/lib/${MOZILLA}/browser/chrome/icons/default/default48.png
 
 MOZILLA_CAP=	${MOZILLA:C/^(.).*/\1/:tu}${MOZILLA:C/^.//}
 
 MOZ_EXPORT=	MOZ_TELEMETRY_REPORTING="" \
 		MOZILLA_OFFICIAL="1" \
 		MOZ_OFFICIAL_BRANDING="1" \
 		MOZ_APP_DISPLAYNAME="${MOZILLA_CAP}" \
 		MOZ_APP_NAME="${MOZILLA}"
 
 MOZ_OPTIONS=	--enable-application=browser \
 		--with-wasi-sysroot=${LOCALBASE}/share/wasi-sysroot \
 		--allow-addon-sideload \
 		--disable-crashreporter \
 		--disable-debug \
 		--disable-default-browser-agent \
 		--disable-tests \
 		--disable-updater \
 		--enable-hardening \
 		--enable-optimize \
 		--enable-release \
 		--with-app-name=${MOZILLA} \
 		--with-unsigned-addon-scopes=app,system \
 		--enable-bootstrap \
 		MOZ_CRASHREPORTER=0 \
 		MOZ_DATA_REPORTING=0
 
 .include "${.CURDIR}/../../www/firefox/Makefile.options"
 
 .include <bsd.port.options.mk>
 
 .if ${ARCH} == i386 && ${MACHINE_CPU:Msse2}
 # is not enabled on i386 by default
 # Fix for error: always_inline function '_mm_setzero_si64' requires target feature 'sse2'
 CFLAGS_i386+=	-msse2
 .endif
 
 .if ${ARCH} == amd64
 MOZ_OPTIONS+=	--enable-rust-simd
 .endif
 
 post-extract:
 	@${SED} -e 's|@FIREFOX_ICON@|${FIREFOX_ICON:R}|;s|@MOZILLA@|${MOZILLA}|' \
 		<${FILESDIR}/waterfox.desktop.in >${WRKDIR}/${MOZILLA_EXEC_NAME}.desktop
 post-patch:
 	@${REINPLACE_CMD} -e 's|%%LOCALBASE%%|${LOCALBASE}|g' \
 		${WRKSRC}/browser/app/nsBrowserApp.cpp
 
 post-install:
 	${INSTALL_DATA} ${WRKDIR}/${MOZILLA_EXEC_NAME}.desktop ${STAGEDIR}${DESKTOPDIR}
 	${MKDIR} ${STAGEDIR}${PREFIX}/share/pixmaps
 	${LN} -sf ${FIREFOX_ICON_SRC} ${STAGEDIR}${PREFIX}/share/pixmaps/${FIREFOX_ICON}
 
 .include <bsd.port.mk>
diff --git a/www/waterfox/distinfo b/www/waterfox/distinfo
index 033a8be82fe8..e1c1b4d089a7 100644
--- a/www/waterfox/distinfo
+++ b/www/waterfox/distinfo
@@ -1,5 +1,5 @@
-TIMESTAMP = 1756464808
-SHA256 (BrowserWorks-waterfox-6.6.2_GH0.tar.gz) = 2492b86359d433b800d2f4786619037679202cafefb1295897edd58f56ef9db5
-SIZE (BrowserWorks-waterfox-6.6.2_GH0.tar.gz) = 919738463
+TIMESTAMP = 1757593056
+SHA256 (BrowserWorks-waterfox-6.6.3_GH0.tar.gz) = 5a5cac40a23e0a4a0f3f0a6086ef6b4665dc5dc2b4416718558a36d95285cf15
+SIZE (BrowserWorks-waterfox-6.6.3_GH0.tar.gz) = 919750321
 SHA256 (BrowserWorks-l10n-394dfec_GH0.tar.gz) = 79f5f995c918f9768c7f7d6c38bbd131e1faa631575f18fcc862bc1bdb119ed6
 SIZE (BrowserWorks-l10n-394dfec_GH0.tar.gz) = 23704241
diff --git a/www/waterfox/files/patch-bug1874059 b/www/waterfox/files/patch-bug1874059
deleted file mode 100644
index 3fa954ef9def..000000000000
--- a/www/waterfox/files/patch-bug1874059
+++ /dev/null
@@ -1,25 +0,0 @@
-commit 56c888446600991803fd92d668349101ad4bf160
-Author: Christoph Moench-Tegeder <cmt@burggraben.net>
-Date:   Tue Feb 6 22:51:27 2024 +0100
-
-    switch to -fvisibility flags
-    
-    this fixes linkage with llvm18 (which does not like the former
-    approach via the #pragma in gcc_hidden.h
-    
-    PR: 276746
-    Submitted by: dim@
-
-diff --git build/moz.configure/toolchain.configure build/moz.configure/toolchain.configure
-index d08b748db250..4696f69153f6 100644
---- build/moz.configure/toolchain.configure
-+++ build/moz.configure/toolchain.configure
-@@ -2186,7 +2186,7 @@ set_define("_LIBCPP_HIDE_FROM_ABI", libcxx_override_visibility.hide_from_abi)
- @depends(target, build_environment)
- def visibility_flags(target, env):
-     if target.os != "WINNT":
--        if target.kernel == "Darwin":
-+        if target.kernel == "Darwin" or target.kernel == "FreeBSD":
-             return ("-fvisibility=hidden", "-fvisibility-inlines-hidden")
-         return (
-             "-I%s/system_wrappers" % os.path.join(env.dist),