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.

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

This is a Desktop platform only release (Windows, macOS, and Linux), but Android should be available in the coming weeks. This release updates Firefox to 115.0.2esr, including bug fixes, stability improvements and important security updates. Tor Browser 13.0a1 is now available from the Tor Browser download page and also from our distribution directory.

Instal the new for android Tor 13.0.1