# New Release: Tor Browser 15.0.21

**URL:** https://forum.torproject.org/t/new-release-tor-browser-15-0-21/22067
**Category:** News
**Tags:** tor-browser
**Created:** [September 1, 2026, 9:14pm UTC](https://forum.torproject.org/t/new-release-tor-browser-15-0-21/22067 "2026-09-01T21:14:33Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![system](https://forum.torproject.org/uploads/default/original/2X/d/d3424bed34f4ec18b2e99178c2801ba6dfb655d6.png) [@system](https://forum.torproject.org/u/system)
#### Post date: [September 1, 2026, 9:14pm UTC](https://forum.torproject.org/t/new-release-tor-browser-15-0-21/22067/1 "2026-09-01T21:14:33Z")

</div>

by [ma1](https://blog.torproject.org/author/ma1) | September 1, 2026

 ![](https://forum.torproject.org/uploads/default/original/2X/d/d3c658a783b059e1a77f87e39d5d33b9dde85f68.jpeg)

Tor Browser 15.0.21 is now available from the [Tor Browser download page](https://www.torproject.org/download/) and also from our [distribution directory](https://www.torproject.org/dist/torbrowser/15.0.21/).

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/).

## Full changelog

The [full changelog](https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/raw/maint-15.0/projects/browser/Bundle-Data/Docs-TBB/ChangeLog.txt) since Tor Browser 15.0.20 is:

- All Platforms
- Windows + macOS + Linux
- Android
  - Updated GeckoView to 140.15.0esr

- Build System
  - Windows + Linux + Android

* * *
This is a companion discussion topic for the original entry at [https://blog.torproject.org/new-release-tor-browser-15021/](https://blog.torproject.org/new-release-tor-browser-15021/)