diff --git a/www/firefox-esr/Makefile b/www/firefox-esr/Makefile
index af06f5cdf4e0..50e0c2f90e12 100644
--- a/www/firefox-esr/Makefile
+++ b/www/firefox-esr/Makefile
@@ -1,71 +1,70 @@
 PORTNAME=	firefox
-DISTVERSION=	115.14.0
-PORTREVISION=	2
+DISTVERSION=	115.15.0
 PORTEPOCH=	1
 CATEGORIES=	www wayland
 MASTER_SITES=	MOZILLA/${PORTNAME}/releases/${DISTVERSION}esr/source \
-		MOZILLA/${PORTNAME}/candidates/${DISTVERSION}esr-candidates/build2/source
+		MOZILLA/${PORTNAME}/candidates/${DISTVERSION}esr-candidates/build1/source
 PKGNAMESUFFIX=	-esr
 DISTFILES=	${DISTNAME}esr.source${EXTRACT_SUFX}
 
 MAINTAINER=	gecko@FreeBSD.org
 COMMENT=	Web browser based on the browser portion of Mozilla
 WWW=		https://www.mozilla.com/firefox
 
 BUILD_DEPENDS=	nspr>=4.32:devel/nspr \
 		nss>=3.90:security/nss \
 		icu>=73.1,1:devel/icu \
 		libevent>=2.1.8:devel/libevent \
 		harfbuzz>=7.3.0:print/harfbuzz \
 		graphite2>=1.3.14:graphics/graphite2 \
 		png>=1.6.39:graphics/png \
 		dav1d>=1.0.0:multimedia/dav1d \
 		libvpx>=1.13.0:multimedia/libvpx \
 		${PYTHON_PKGNAMEPREFIX}sqlite3>0:databases/py-sqlite3@${PY_FLAVOR} \
 		v4l_compat>0:multimedia/v4l_compat \
 		autoconf2.13:devel/autoconf2.13 \
 		nasm:devel/nasm \
 		yasm:devel/yasm \
 		zip:archivers/zip
 
 USE_GECKO=	gecko
 CPE_PRODUCT=	${PORTNAME}_esr
 CONFLICTS_INSTALL=	firefox
 USE_MOZILLA=	-sqlite
 CFLAGS_powerpc64le=	-DSQLITE_BYTEORDER=1234
 CONFIGURE_ENV+=	BINDGEN_CFLAGS="-I${LOCALBASE}/include"
 
 USES=		tar:xz
 
 FIREFOX_ICON=		${MOZILLA}.png
 FIREFOX_ICON_SRC=	${PREFIX}/lib/${MOZILLA}/browser/chrome/icons/default/default48.png
 FIREFOX_DESKTOP=	${MOZSRC}/taskcluster/docker/${MOZILLA}-snap/${MOZILLA}.desktop
 MOZ_OPTIONS=	--enable-application=browser \
 		--enable-official-branding
 
 .include "${.CURDIR}/../../www/firefox/Makefile.options"
 
 .include <bsd.port.options.mk>
 
 .if ${ARCH} == powerpc64
 MOZ_OPTIONS+=	--without-wasm-sandboxed-libraries
 .else
 BUILD_DEPENDS+= ${LOCALBASE}/share/wasi-sysroot/lib/wasm32-wasi/libc++abi.a:devel/wasi-libcxx${LLVM_VERSION} \
 		${LOCALBASE}/share/wasi-sysroot/lib/wasm32-wasi/libc.a:devel/wasi-libc \
 		wasi-compiler-rt${LLVM_VERSION}>0:devel/wasi-compiler-rt${LLVM_VERSION}
 MOZ_OPTIONS+=	--with-wasi-sysroot=${LOCALBASE}/share/wasi-sysroot
 .endif
 
 post-patch:
 	@${REINPLACE_CMD} -e 's/%u/%U/' -e '/X-MultipleArgs/d' \
 		-e '/^Icon/s/=.*/=${FIREFOX_ICON:R}/' \
 		${FIREFOX_DESKTOP}
 	@${REINPLACE_CMD} -e 's|%%LOCALBASE%%|${LOCALBASE}|g' \
 		${WRKSRC}/browser/app/nsBrowserApp.cpp
 
 post-install:
 	${INSTALL_DATA} ${FIREFOX_DESKTOP} ${STAGEDIR}${PREFIX}/share/applications/
 	${MKDIR} ${STAGEDIR}${PREFIX}/share/pixmaps
 	${LN} -sf ${FIREFOX_ICON_SRC} ${STAGEDIR}${PREFIX}/share/pixmaps/${FIREFOX_ICON}
 
 .include <bsd.port.mk>
diff --git a/www/firefox-esr/distinfo b/www/firefox-esr/distinfo
index 0e62e4632c43..1be978c18a8e 100644
--- a/www/firefox-esr/distinfo
+++ b/www/firefox-esr/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1722537520
-SHA256 (firefox-115.14.0esr.source.tar.xz) = 8955e1b5db83200a70c6dea4b614e19328d92b406ec9a1bde2ea86333a74dab4
-SIZE (firefox-115.14.0esr.source.tar.xz) = 507310580
+TIMESTAMP = 1724686968
+SHA256 (firefox-115.15.0esr.source.tar.xz) = effed92aa0d961871614c611259dfe3eab72e5ebfe8f2405f9bc92c5e7feae81
+SIZE (firefox-115.15.0esr.source.tar.xz) = 507920832