Tor Browser 15.0 released

[Posted October 29, 2025 by jzb]

Version 15.0 of the Tor Browser has been released:

This is our first stable release based on Firefox ESR 140, incorporating a year's worth of changes that have been shipped upstream in Firefox. As part of this process, we've also completed our annual ESR transition audit, where we reviewed and addressed around 200 Bugzilla issues for changes in Firefox that may negatively affect the privacy and security of Tor Browser users. Our final reports from this audit are now available in the tor-browser-spec repository on our GitLab instance.

This release inherits the vertical tabs feature, unified search button, as well as other new features and usability improvements in Firefox that have passed the Tor Project's audit.