New Alpha Release: Tor Browser 13.0a1 (Windows, macOS, Linux)

by richard | July 26, 2023

Tor Browser 13.0a1 is now available from the Tor Browser download page and also from our distribution directory.

This release updates Firefox to 115.2.0esr, including bug fixes, stability improvements and important security updates. This is a Desktop platform only release (Windows, macOS, and Linux), but Android should be available in the coming weeks.

This is our first alpha release in the 13.0 series and represents a transition from Firefox 102-esr to Firefox 115-esr. This builds on a year's worth of upstream Firefox changes, so alpha-testers should expect to run into issues. If you find any issues, please report them on our gitlab or on the Tor Project forum.

We have started our annual esr transition audit, where we review Mozilla's year's worth of work with an eye for privacy and security issues that would negatively affect Tor Browser users. This will be completed before we transition the 13.0 alpha series to stable. At-risk users should remain on the 102-esr based 12.5 stable series which will continue to receive security updates until 13.0 alpha is promoted to stable.

We would like to thank volunteer contributor cypherpunks1 for their fixes for tor-browser#26277, tor-browser#33955, tor-browser#41399, and tor-browser#41791. If you would like to contribute, our issue tracker can be found here.

Full changelog

The full changelog since Tor Browser 12.5a7 is:

This is a companion discussion topic for the original entry at
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