Build Configuration

Please be aware that this page doesn't reflect all the options used to build Tor Browser Nightly.

Source

Built from https://gitlab.torproject.org/tpo/applications/tor-browser/-/commit/51b4993cf9d823439984ed82caa7864f4208f70b

Build platform

target
i686-w64-mingw32

Build tools

Compiler	Version	Compiler flags
/var/tmp/dist/mingw-w64-clang/bin/i686-w64-mingw32-clang	19.1.7	-mstackrealign -ffunction-sections -fdata-sections -fno-math-errno -D_HAS_EXCEPTIONS=0 -include _mingw.h
/var/tmp/dist/mingw-w64-clang/bin/i686-w64-mingw32-clang++	19.1.7	-Wno-incompatible-ms-struct -mstackrealign -fno-rtti -fno-sized-deallocation -fno-aligned-new -ffunction-sections -fdata-sections -fno-math-errno -fno-exceptions -D_HAS_EXCEPTIONS=0 -fms-extensions -include _mingw.h -g -gcodeview -O2 -fno-omit-frame-pointer -funwind-tables
/var/tmp/dist/rust/bin/rustc	1.86.0

Configure options

--target=i686-w64-mingw32 MOZILLA_OFFICIAL=1 --enable-update-channel=nightly 'CFLAGS=-include _mingw.h' 'CXXFLAGS=-fms-extensions -include _mingw.h' LDFLAGS=-Wl,--no-seh --with-toolchain-prefix=i686-w64-mingw32- CC=i686-w64-mingw32-clang CXX=i686-w64-mingw32-clang++ HOST_CC=clang HOST_CXX=clang++ AR=llvm-ar MOZ_SOURCE_REPO=https://gitlab.torproject.org/tpo/applications/tor-browser MOZ_SOURCE_CHANGESET=51b4993cf9d823439984ed82caa7864f4208f70b --with-distribution-id=org.torproject 'BINDGEN_CFLAGS=-I/var/tmp/dist/mingw-w64-clang/i686-w64-mingw32/include/c++/v1 -I/var/tmp/dist/mingw-w64-clang/i686-w64-mingw32/include' --enable-js-shell --enable-rust-simd --disable-eme MOZ_TELEMETRY_REPORTING= --disable-webrtc --enable-proxy-bypass-protection --disable-bits-download WASI_SYSROOT=/var/tmp/dist/wasi-sysroot --disable-backgroundtasks MAR_CHANNEL_ID=torbrowser-torproject-nightly ACCEPTED_MAR_CHANNEL_IDS=torbrowser-torproject-nightly --enable-nss-mar --disable-maintenance-service --disable-default-browser-agent --disable-notification-server --enable-base-browser-update --with-updater-url=https://nightlies.tbb.torproject.org/nightly-updates/updates/nightly-windows-i686 --with-branding=browser/branding/tb-nightly 'MOZ_APP_REMOTINGNAME=Tor Browser Nightly' --disable-crashreporter --disable-parental-controls --disable-system-policies --disable-legacy-profile-creation MOZ_WINDOWS_RS_DIR=/var/tmp/dist/windows-0.58.0 --enable-strip --with-relative-data-dir=TorBrowser/Data/Browser --with-base-browser-version=tbb-nightly.2025.12.08