Tor Browser 16.0a1 is now available from the Tor Browser download page (https://www.torproject.org/download/alpha/) and also from our distribution directory (https://www.torproject.org/dist/torbrowser/16.0a1/).

This is the first Tor Browser Alpha release based on Firefox Rapid Release: read more about this important change in The Future of Tor Browser Alpha (https://blog.torproject.org/future-of-tor-browser-alpha/).

This version includes important security updates (https://www.mozilla.org/en-US/security/advisories/) to Firefox.

Send us your feedback If you find a bug or have a suggestion for how we could improve this release, please let us know (https://support.torproject.org/misc/bug-or-feedback/).

⚠️ Reminder: Tor Browser Alpha release channel is for testing only (https://community.torproject.org/user-research/become-tester/). If you are at risk or need strong anonymity, stick with the stable release channel (https://www.torproject.org/download/).

Full changelog The full changelog (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/raw/main/projects/browser/Bundle-Data/Docs-TBB/ChangeLog.txt) since Tor Browser 15.0a4 is:

• All Platforms

• Updated NoScript to 13.5.1.90101984

• Bug tor-browser#43792 (https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/43792): Determine whether noscript_persist users need to have their NoScript settings migrated

• Bug tor-browser#43998 (https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/43998): Rebase Tor Browser Alpha onto 141.0

• Bug tor-browser#44118 (https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/44118): Decide how to deal with upstream feature gates in a RR world

• Bug tor-browser#44280 (https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/44280): Test stream isolation

• Bug tor-browser#44333 (https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/44333): Add the “No AI” version of DuckDuckGo to available search engines

• Bug tor-browser#44365 (https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/44365): Fix CSS linting errors introduced for firefox 145

• Bug tor-browser#44391 (https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/44391): Restrictions cascade blocks every capability in subframes (e.g. captchas)

• Bug tor-browser#44408 (https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/44408): Fix TorDomainIsolator in 146

• Bug tor-browser#44418 (https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/44418): Update built-in obfs4 bridges

• Bug tor-browser-build#41609 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41609): Move back to CDN77 for default snowflake bridge

• Bug tor-browser-build#41646 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41646): Update lyrebird version to v0.7.0

• Bug mullvad-browser#483 (https://gitlab.torproject.org/tpo/applications/mullvad-browser/-/issues/483): Add the “No AI” version of DuckDuckGo to available search engines

• Bug mullvad-browser#487 (https://gitlab.torproject.org/tpo/applications/mullvad-browser/-/issues/487): Search engines are sorted alphabetically rather than the desired order

• Windows + macOS + Linux

• Updated Firefox to 146.0a1esr

• Bug tor-browser#44302 (https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/44302): Fix the flags of some about pages

• Bug tor-browser#44310 (https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/44310): Default zoom always resets to 100%

• Bug tor-browser#44411 (https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/44411): DownloadsTorWarning.sys.mjs fails to load

• Bug tor-browser#44419 (https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/44419): Re-add the moz-toggle title attribute patch

• Linux

• Bug tor-browser#44273 (https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/44273): Restore Noto CJK as Jigmo has a too low readability

• Bug tor-browser#44315 (https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/44315): Font/text issue with self-upgrade window

• Android

• Updated GeckoView to 146.0a1esr

• Bug tor-browser#44303 (https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/44303): Extension update job might never work on Android

• Bug tor-browser#44324 (https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/44324): Refactor the NSS no proxy-bypass patch on A-S to avoid -Wunreachable-code

• Build System

• All Platforms

• Bug tor-browser#43951 (https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/43951): Include product with the component in triage CSVs

• Bug tor-browser-build#40903 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/40903): Make xz multi-threaded

• Bug tor-browser-build#41445 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41445): Better handle bugzilla “Web Compatibility” issues in generate-bugzilla-triage-csv

• Bug tor-browser-build#41607 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41607): Fix regression from #41373 in tools/count-mar-downloads

• Bug tor-browser-build#41608 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41608): Add per-platform numbers for incrementals in count-mar-downloads

• Bug tor-browser-build#41643 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41643): Update toolchains for Firefox 146

• Bug tor-browser-build#41644 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41644): Self-hosted browser extensions support in relprep.py

• Bug tor-browser-build#41647 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41647): Add a XZ_DEFAULTS to set_default_env

• Bug tor-browser-build#41648 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41648): Add a mozconfig to projects/geckoview

• Bug tor-browser-build#41654 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41654): Make relprep.py update Moat settings

• Windows + macOS + Linux

• Bug tor-browser-build#41662 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41662): Add python-zstandard to desktop containers

• Windows + Linux + Android

• Bug tor-browser-build#41580 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41580): Update Go major to 1.25.x

• Updated Go to 1.25.5

• macOS

• Bug tor-browser-build#41665 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41665): Update macos signing wrapper for new executable gpu-helper.app

• Linux

• Bug tor-browser-build#41601 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41601): Upstream dropped Linux i686 support

• Bug tor-browser-build#41627 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41627): Firefox build system needs a more recent version of OpenSSL on Linux

• Bug tor-browser-build#41632 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41632): Ship Linux aarch64 builds in Alpha Release Channel

• Bug tor-browser-build#41639 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41639): Remove linux-arm target

• Bug tor-browser-build#41640 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41640): Clean the GCC config file

• Android

• Bug tor-browser#44360 (https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/44360): Patch the vendored Gradle Nimbus plugin

• Bug tor-browser#44370 (https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/44370): Always produce target.maven.zip

• Bug tor-browser-build#41485 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41485): Retire get_gradle_dependencies_list and create a simple way to update gradle deps

• Bug tor-browser-build#41573 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41573): Remove Android x86 support

• Bug tor-browser-build#41617 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41617): Pass page size to zipalign

• Bug tor-browser-build#41620 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41620): Do not rerun zipalign when signing

• Bug tor-browser-build#41621 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41621): Remove support using older android build tools when signing 14.5 releases in tools/signing/wrappers/sign-apk

• Bug tor-browser-build#41628 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41628): android_ndk_version and revision can be grouped together

• Bug tor-browser-build#41636 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41636): Update the scripts to manage Gradle dependencies

• Bug tor-browser-build#41666 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41666): Normalize the path to tor-expert-bundle.aar

• Bug tor-browser-build#41669 (https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41669): Restore UglifyJS but for Android x86_64

•

      applications
     (https://blog.torproject.org/category/applications)

•

      releases
     (https://blog.torproject.org/category/releases)