# 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/c76b89e2fd0e719eb012d5dccb507338bb122537

## Build platform

target
i686-pc-mingw32

## Build tools

Compiler | Version | Compiler flags
--- | --- | ---
/var/tmp/dist/mingw-w64-clang/bin/i686-w64-mingw32-clang | 21.1.8 | -mstackrealign -ffunction-sections -fdata-sections -fno-math-errno -D_HAS_EXCEPTIONS=0 -ffile-reproducible -fdiagnostics-absolute-paths -include _mingw.h
/var/tmp/dist/mingw-w64-clang/bin/i686-w64-mingw32-clang++ -std=gnu++20 | 21.1.8 | -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 -ffile-reproducible -fdiagnostics-absolute-paths -fms-extensions -include _mingw.h -g -gcodeview -O2 -fno-omit-frame-pointer -funwind-tables
/var/tmp/dist/rust/bin/rustc | 1.94.1 |

## Configure options

--target=i686-pc-windows-gnu 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 --enable-lto=cross MOZ_SOURCE_REPO=https://gitlab.torproject.org/tpo/applications/tor-browser MOZ_SOURCE_CHANGESET=c76b89e2fd0e719eb012d5dccb507338bb122537 --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 MOZ_WINDOWS_APP_SDK_DIR=/var/tmp/dist/windows-app-sdk WASI_SYSROOT=/var/tmp/dist/wasi-sysroot --disable-backgroundtasks --with-branding=browser/branding/tb-nightly 'MOZ_APP_REMOTINGNAME=Tor Browser Nightly' --disable-crashreporter --disable-parental-controls 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 --disable-zucchini --enable-base-browser-update --with-updater-url=https://nightlies.tbb.torproject.org/nightly-updates/updates/nightly-windows-i686 --disable-system-policies --disable-system-preferences --disable-legacy-profile-creation MOZ_WINDOWS_RS_DIR=/var/tmp/dist/windows-0.62.2 --enable-strip --with-relative-data-dir=TorBrowser/Data/Browser --with-base-browser-version=tbb-nightly.2026.09.05